WO2011008922A2

WO2011008922A2 - Endoscopic robotic catheter system

Info

Publication number: WO2011008922A2
Application number: PCT/US2010/042080
Authority: WO
Inventors: Jeffery B. Alvarez; Federico Barbagli; Christopher R. Carlson; Christopher M. Sewell; Gregory J. Stahler; Neal A. Tanner
Original assignee: Hansen Medical, Inc.
Priority date: 2009-07-16
Filing date: 2010-07-15
Publication date: 2011-01-20
Also published as: WO2011008922A3

Abstract

A robotic catheter system includes an instrument driver in communication with a controller and having an elongate instrument interface including a plurality of instrument drive elements responsive to control signals generated, at least in part, by user input through a master input device operatively coupled to the controller, and an elongate instrument having a guide instrument base operatively coupled to the guide instrument interface. The elongate instrument comprises additional lumens to accommodate instruments such as an optics bundle, a light bundle, a laser fiber, and flush irrigation. The working lumen preferably is configured to accommodate a grasping or capturing tool, such as a collapsible basket or grasper, for use in procedures such as kidney stone interventions.

Description

ENDOSCOPIC ROBOTIC CATHETER SYSTEM FIELD OF THE INVENTION The invention relates generally to robotically controlled systems, such as telerobotic surgical systems, and more particularly to a robotic catheter system for performing minimally invasive diagnostic and therapeutic procedures.

BACKGROUND

Robotic surgical systems and devices are well suited for use in performing minimally invasive medical procedures, as opposed to conventional techniques wherein the patient's body cavity is open to permit the surgeon's hands access to internal organs. For example, there is a need for a highly controllable yet minimally sized system to facilitate imaging, diagnosis, and treatment of tissues which may lie deep within a patient, and which may be preferably accessed only via naturally- occurring pathways such as blood vessels, gastrointestinal tract, or urinary tract.

SUMMARY

Embodiments of the invention are directed to a robotic catheter system, comprising a robotically steerable catheter instrument comprising a housing and an elongate flexible body, the elongate flexible body defining one or more instrument lumens longitudinally therethrough; an electromechanical instrument driver comprising a housing, a plurality of motors, and an instrument interface configured to removably engage the catheter instrument housing and transfer a plurality of steering actuations to the catheter instrument when engaged thereto; an elongate medical instrument slidably positioned through one of the one or more instrument lumens; an electromechanical device actuation assembly coupled to the proximal end of the elongate medical instrument and configured to actuate the medical instrument independently of steering actuations transferred to the robotically steerable catheter instrument; and a controller configured to operate the instrument driver and device actuation assembly to respectively steer the catheter instrument and actuate the elongate medical instrument subject to commands imparted by an operator to a master input device operably coupled to the controller.

The one or more instrument lumens may be configured to separately and simultaneously accommodate an optics bundle, a light bundle, and a laser fiber, and to define a flush channel. The instrument housing may comprise an optics bundle connection interface. Alternatively or additionally, the instrument housing may comprise a light bundle connection interface. Alternatively or additionally, the instrument housing may comprise a laser fiber coupling interface. Alternatively or additionally, the instrument housing may comprise a flush channel supply interface. In one embodiment, one of the one or more instrument lumens may be sized to accommodate slidable coupling of a collapsible basket tool. An optics bundle connection interface may comprise a translucent light transmission interface between fibers comprising the optics bundle in the housing and fibers comprising an external optics bundle coupled to a video processing device. Alternatively or additionally, the optics bundle connection interface may comprise a translucent light transmission interface between fibers comprising the optics bundle in the housing and a digital image capture chip.

The elongate flexible body may comprise a substantially square cross sectional shape having corners. The corners may be rounded in shape. Alternatively or additionally, the elongate flexible body may comprise a polymeric coextrusion. Alternatively or additionally, the elongate flexible body may define four integrated instrument lumens arranged immediately adjacent the corners. By way of non-limiting example, the elongate flexible body may define four control wire lumens arranged between the four integrated instrument lumens. The working instrument lumen may have a diameter which is greater than that of the integrated instrument lumens, and the control wire lumens may have a diameter which is smaller than that of the integrated instrument lumens. The elongate body may have a first portion with a first flexibility and a second portion extending distally from the first portion, the second portion having a second flexibility substantially greater than the first flexibility. The catheter system may further comprise a flexible sheath body defining a working lumen sized to accommodate slidable engagement of the elongate flexible body, and an outer cross sectional shape that is substantially circular. The shape of the working lumen of the sheath body and outer shape of the elongate flexible body may be jointly configured to limit rotational movement of the elongate flexible body relative to the sheath body.

In one embodiment, the device actuation assembly may be configured to controllably insert and retract the medical instrument relative to the catheter instrument. The device actuation assembly may comprise two or more pinch roller wheels movably coupled to the medical instrument. The device actuation assembly may comprise a lead screw assembly coupled to the medical instrument. The device actuation assembly may comprise a recirculatory tension member assembly movably coupled to the medical instrument. The medical instrument may be selected from the group consisting of a laser fiber, a guidewire, a collapsible basket tool, a flexible needle, a grasper, and a balloon tool. In one embodiment, the device actuation assembly may be configured to controllably roll the medical instrument relative to the catheter instrument. In one embodiment, the device actuation assembly comprises two surfaces configured to engage opposite sides of the medical instrument, and to roll the medical instrument as at least one of such surfaces is moved relative to each other through a motion plane substantially parallel to an axis of roll motion defined as the medical instrument is rolled, wherein one of the two surfaces may be substantially planar. In another embodiment, one of the two surfaces may comprise a pinch roller wheel surface. In one embodiment, the device actuation assembly comprises a rolling subassembly that is coupled to a coupling element configured to removably and fixedly couple to the medical instrument, and wherein the rolling subassembly is rotatably coupled to a base element configured to not rotate relative to the instrument driver.

The medical instrument may be selected from the group consisting of a laser fiber, a guidewire, a collapsible basket tool, a flexible needle, a grasper, and a balloon tool. In one embodiment, the device actuation assembly may comprise an elongate tension element operably coupled between an actuator coupled to a housing of the device actuation assembly and a distally operable element of the medical device such that activation of the actuator creates tension in the tension element and a pulling actuation of the distally operable element. The distally operable element may be selected from the group consisting of a grasper closure element, a grasper opener element, a collapsible basket collapse element, and a collapsible basket expand element. In another embodiment, the device actuation assembly may comprise an elongate compression element operably coupled between an actuator coupled to a housing of the device actuation assembly and a distally operable element of the medical device such that activation of the actuator creates compression in the tension element and a pushing actuation of the distally operable element. The distally operable element may be selected from the group consisting of a grasper closure element, a grasper opener element, a collapsible basket collapse element, and a collapsible basket expand element.

The device actuation assembly may comprise an injection pump fluidly coupled with one of the lumens defined through the elongate flexible body and configured to inject or suction out fluid through said lumen. The injection pump may comprise a piston operably coupled to an actuator and movably coupled to a fluid reservoir housing. The injection pump may comprise a reservoir configured to contain an injectible fluid selected from the group consisting of liquid contrast agent, saline, and liquid therapeutics. The medical instrument may comprise a balloon tool or a flexible needle. In one embodiment, the medical instrument may have a proximal end comprising a manual control interface, wherein the device actuation assembly comprises one or more fittings configured to removably couple to one or more portions of the manual control interface to substantially reproduce relative motions of such portions when operated manually. At least one of said one or more fittings may comprise a pin array. At least one of said one or more fittings may comprise a post array. At least one of said one or more fittings may be coupled to a motion subassembly selected from the group consisting of an assembly of one or more leadscrews and a recirculatory tension member assembly. At least one of said one or more fittings may be coupled to an assembly of two lead screws configured to move orthogonally relative to each other. At least one of the one or more fittings may be configured to be electromechanically rotated relative to other portions of the manual control interface. The device actuation assembly may comprise a torquable coupling configured to allow for misalignment between an axis of rotation of a rotation actuator providing electromechanical rotation and an axis of rotation of the fitting configured to be electromechanically rotated. The torquable coupling may comprise a Schmidt type coupling. Some embodiments of the invention is directed to a robotic instrument system, comprising an operator workstation comprising one or more displays and one or more input devices; a controller operatively coupled to the operator workstation; an instrument driver operatively coupled to the controller, the instrument driver comprising one or more motors operatively coupled to an instrument interface and being operably coupled to and supported by a lockably mobile instrument driver base configured to rest upon a floor of an operating room adjacent a patient; and an elongate flexible guide instrument having a longitudinal axis and a base portion operably coupled to the instrument interface; wherein the controller is configured to selectively actuate the one or more motors to thereby selectively move a distal end portion of the guide instrument in response to control signals generated, at least in part, by the one or more input devices. In one such embodiment, the instrument driver may be rotatable relative to the mounting structure. In another such embodiment, the instrument driver, when mounted upon the mounting structure, may be substantially fixed relative to the mounting structure. In yet another embodiment, the instrument driver may be mechanically integrated into the mounting structure. In still another embodiment, the mounting structure may comprise at least one configurable revolute joint. This at least one configurable revolute joint may comprise a braked joint, such as an electronically braked joint.

Another embodiment is directed to a flexible instrument assembly, comprising an elongate flexible body defining a plurality of integrated instrument lumens longitudinally therethrough, as well as an interchangeable working instrument lumen therethrough which is positioned approximately coincident with the longitudinal axis of the elongate flexible body; an instrument housing coupled to a proximal portion of the elongate body; a plurality of radially spaced-apart control wires coupled to a distal end portion of the elongate flexible body, the control wires extending proximally through a wall of the elongate body and out at least one opening defined by the proximal end of said elongate body; and a plurality of control wire interface assemblies carried in the instrument housing, each interface assembly comprising a pulley that is rotatable relative to the housing, the guide instrument control wires each having a proximal end extending out of the at least one opening defined by the proximal end of the elongate body and wound onto a respective pulley, such that movement of the guide instrument distal end may be controlled by rotational movement of the one or more pulleys.

The instrument lumens of the flexible instrument assembly may be configured to separately and simultaneously accommodate an optics bundle, a light bundle, and a laser fiber, and to define a flush channel, and the instrument housing may comprise an optics bundle connection interface, a light bundle connection interface, a laser fiber coupling interface, and/or a flush channel supply interface. The working instrument lumen may be sized to accommodate slidable coupling of a collapsible basket tool. In one embodiment, an optics bundle connection interface may comprise a translucent light transmission interface between fibers comprising the optics bundle in the housing and fibers comprising an external optics bundle coupled to a video processing device. The optics bundle connection interface may comprise a translucent light transmission interface between fibers comprising the optics bundle in the housing and a digital image capture chip.

The elongate flexible body of the flexible instrument assembly may comprise a substantially square cross sectional shape having corners, and in one embodiment the corners may be rounded in shape. The elongate flexible body may comprise a polymeric coextrusion, and/or may define four integrated instrument lumens arranged immediately adjacent the corners. The elongate flexible body may further define four control wire lumens arranged between the four integrated instrument lumens. The working instrument lumen may have a diameter which is greater than that of the integrated instrument lumens, and the control wire lumens may have a diameter which is smaller than that of the integrated instrument lumens. In one embodiment, respective control wire interface assemblies each comprise a mechanical fitting coupled to or defined into the respective pulley, each mechanical fitting configured to engage a respective motor drive assembly.

In one embodiment the elongate body of the flexible instrument assembly may have a first portion with a first flexibility and a second portion extending distally from the first portion, the second portion having a second flexibility substantially greater than the first flexibility. The assembly may further comprise a flexible sheath body defining a working lumen sized to accommodate slidable engagement of the elongate flexible body, and an outer cross sectional shape that is substantially circular. In one embodiment, the shape of the working lumen of the sheath body and outer shape of the elongate flexible body may be jointly configured to limit rotational movement of the elongate flexible body relative to the sheath body.

One embodiment is directed to a method for conducting a kidney stone intervention using embodiments of the invention and for the purpose of better understanding the invention, comprising advancing a distal tip of a robotically- steerable catheter assembly through a ureter to a position inside of the kidney adjacent a kidney stone, the catheter assembly comprising an electromechanically steerable elongate body coupled to a light bundle, an image capture device having a field of view, and a laser fiber, the elongate body defining a flush lumen and a working tool lumen which is positioned substantially coincident to a longitudinal axis of the elongate body; utilizing light projected from the light bundle and received within the field of view of the image capture device to confirm the position of a kidney stone relative to the distal portion of the catheter assembly; advancing a stone capture device through the working lumen and at least a portion of the field of view of the optics bundle, capturing the stone, and pulling it proximally toward the distal end of the elongate body wherein it can be viewed within at least a portion of the field of view of the image capture device and held substantially in place by the stone capture device; advancing the laser fiber into contact with the kidney stone; and destroying at least a portion of the kidney stone with energy delivered by the laser fiber.

In one embodiment, advancing may comprise electromechanically moving a carriage on an instrument driver toward the patient in response to signals generated by an operator with a master input device, the carriage being removably coupled to a housing comprising the proximal end of the robotically steerable catheter assembly.

In one embodiment, the stone capture device may comprise a collapsible basket, wherein pulling the basket proximally causes it to collapse upon and capture the stone. In another embodiment, the stone capture device may comprise a grasper. In one embodiment, advancing a stone capture device may comprise actuating a motor as commanded by an operator. In another embodiment, advancing a laser fiber comprises actuating a motor as commanded by an operator. Destroying at least a portion of the kidney stone may comprise delivering energy to the stone in an incremental patterned fashion.

The method may further comprise registering an image of the kidney anatomy to an in situ coordinate system associated with navigation of the robotically-steerable catheter assembly. In one embodiment, the image may comprise a contrast agent envelope image from fluoroscopy. In another embodiment, the image may comprise an image captured with an imaging modality selected from the list including fluoroscopy, radiography, computed tomography, magnetic resonance imaging, and ultrasound. The method may further comprise segmenting the image to generate a model of the imaged matter before registering it to the in situ coordinate system, and/or utilizing a real-time image capture device to observe the position of portions of the catheter assembly relative to other surrounding structures. In one embodiment, the real-time image capture device may be one selected from the list including endocorporeal ultrasound, transcutaneous ultrasound, and fluoroscopy.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 illustrates a system comprising an operator workstation, an instrument driver, an elongate steerable instrument, and other components in accordance with one embodiment of the subject invention.

Figure 2 illustrates an alternative configuration wherein an articulated mounting system couples an instrument driver to an operating table.

Figures 3A-3D illustrate additional embodiments of instrument driver support structures, each of such embodiments having a mobile base.

Figures 4A-4L depict aspects of embodiments of an elongate steerable catheter configuration suitable for use with the subject system.

Figure 5 depicts a lockable elongate member infrastructure suitable for use in various embodiments of the invention.

Figures 6A-6F illustrate various embodiments of a diagnostic and/or interventional navigation of components toward the kidney through the urethra, bladder, and ureters.

Figures 6G-6N illustrate various embodiments of an interventional navigation of the subject system into one of the calices of the kidney to destroy a kidney stone. Figures 60-6U illustrate various embodiments of an interventional navigation of the subject system into one of the inferior calices of the kidney to destroy a kidney stone.

Figure 6S illustrates a method using embodiments of the invention for conducting a kidney stone intervention.

Figures 7A-7D illustrate embodiments for actuating or inserting/retracting various types of instruments operatively coupled with a steerable catheter system.

Figures 8A and 8B illustrate an embodiment for imparting roll or rotational actuation to various types of instruments operatively coupled with a steerable catheter system.

Figures 9A and 9B illustrate another embodiment for imparting roll or rotational actuation to various types of instruments operatively coupled with a steerable catheter system.

Figures 1 OA and 1 OB illustrate embodiments for imparting distal end effector actuation for an elongate instrument operatively coupled with a steerable catheter system.

Figures 1 1A and 1 1 B illustrate embodiments wherein fluid actuation may be utilized in injection and expandable balloon related therapies or diagnostics.

Figures 12A-12C illustrate three embodiments for electromechanically actuating a proximal manipulation interface configured for manual actuation.

DETAILED DESCRIPTION

Referring to Figure 1 , a system (14) is depicted wherein an operator (2) is seated at an operator workstation (6) in a position such that he has access to one or more displays (4), in addition to one or more input devices, such as a master input device (10) and an operator button console or pendant (12). A computing system or controller (8) comprising a processor is operably coupled via a cable (16) to a robotic instrument driver (40), which is coupled to an operating table (36) with a fixed mounting member (38). Similar systems have been described, for example, in U.S. Patent Publication Numbers 2005-0222554; 2006-0095022; 2006-0100610; 2006- 0293643; 2007-0043338; 2006-0200026; 2007-0197896; 2007-0156123; 2007- 0233044; 2007-0265503; 2008-0140087; 2008-0027464; 2008-0058836; 2008- 0082109; 2008-01 19727; 2008-0167750; and 2008-0262480.

Referring again to Figure, 1 , the computing system is operably coupled to a laser therapy system (28), a video system (26), and a lighting system (24) configured to provide endoscopic lighting for the video system (26) by respective cables (22, 20, 18) connecting such systems to the computing system (8). The computing system, via such couplings, is configured to control lighting, video image capture, and laser energy emission, preferably in response to commands input by the operator (2) to interfaces such as the pendant (12) or master input device (10) at the operator workstation (6). Other input devices, such as a foot pedal (not shown), may also be operably coupled to the computing system (8) to enable an operator (2) to execute commands, such as video capture, laser energy emission, and/or lighting, via such input. The laser system (28) is operably coupled to the depicted robotic instrument assembly (42) via a laser energy transmission fiber assembly, or "laser fiber", (34) while the video system (26) is operably coupled to the instrument assembly (42) via an optics bundle (32) comprising a plurality of optical transmission fibers. The lighting system (24) is similarly operably coupled to the robotic instrument assembly (42) via a light transmission bundle (30) preferably comprising optical transmission fibers. Further details regarding such operable couplings are described in reference to Figures 4A-4L.

Referring to Figure 2, another embodiment of an instrument driver (40) mounting structure (44) is depicted coupling the instrument driver (40) to an operating table (36) in an adjustable configuration such that a plurality of revolute joints assist in providing adjustable degrees of freedom. While such a configuration may be desirable for diagnostic and/or interventional procedures wherein a frontal transcutaneous access is to be used, procedures wherein the entry point is at a different orientation, such as through the urethra of a patient lying flat on their back on an operating table (36), may be more desirably accessed using setup structures such as those depicted in Figures 3A-3D.

Referring to Figure 3A, an instrument driver (40) having a robotic catheter instrument assembly (42) coupled thereto is depicted coupled to a mobile setup structure base (48) comprising lockable wheels (50) configured to facilitate movement of the apparatus (46) around the operating room using the depicted handle (52), as well as stability when the wheels (50) are locked into position. The instrument driver (40) is coupled to the mobile base (48) by a mounting frame comprising a distal member (56) coupled to the instrument driver either fixedly or rotatably with a lockable joint (not shown). The distal member (56) is rotatably and lockably coupled to a middle member (60) with a distal member revolute joint (58). The proximal end of the middle member is rotatably and lockably coupled to a proximal member with a proximal member revolute joint (62). The proximal member (64) may be configured to lockably rotate or roll relative to the mobile base (48). Any of these lockable joints may be manually or electromechanically locked, such as by one or more electronic brakes which may be controlled utilizing the controller within the computing system (8) of the operator workstation (6), subject to operator commands at the input devices, or automatically triggered braking conditions, such as by safety logic operated by the computing system (8). Referring to Figure 3B, another embodiment of a mobile instrument driver (40) mounting system is depicted, this embodiment comprising an arcuate member (66) rotatably coupled to the proximal end of the middle member with a lockable revolute joint (62). The version of the mobile base (48) depicted in Figure 3B shows an electromechanically lockable roll joint (68) comprising an electric brake. The arcuate member (66) may be desired in certain scenarios wherein clearance and slight elevation provided by the geometry of such arcuate member (66) is important. In other embodiments, the lockable joints described in reference to Figures 3A and 3B may not be lockable, but merely joints which are maintained in position via motors (for example, including gravity compensation systems), timing belts, springs, and the like - or in another embodiment, not maintained strictly in position, wherein continual freedom of motion is desired in a certain scenario.

Referring to Figure 3C, another embodiment of a mobile instrument driver (40) mounting system is depicted, this embodiment comprising a simple coupling structure (70) coupling the instrument driver (40) to the mobile base (48). The simple coupling structure may be a simple fixture without degrees of freedom, or may allow for rotation of the simple coupling structure relative to the mobile base (48) and/or instrument driver (40). Referring to Figure 3D, an embodiment is depicted wherein electromechanical instrument driver components (72), such as motors and instrument interfaces, have been mechanically integrated into a mobile base (48). With such embodiment, the instrument (42) is mounted directly to the mobile base assembly.

Referring to Figures 4A-4L, aspects of an elongate steerable instrument assembly (42) are described, such assembly being configured for endoscopic diagnosis and/or intervention in an environment wherein direct optical visualization (for example, with an optical image capture device such as a fiberscope or camera chip) is desired, such as with kidney stone interventions using trans-urethral endolumenal access.

Referring to Figure 4A, an instrument assembly (42) is depicted comprising an inner elongate member, or "guide member", (81 ) proximally coupled to a specialized inner instrument base housing (77) which is removably coupleable to an image capture device member (1 1 1 ) preferably comprising a camera chip (not shown). The midsection and distal portion of the inner elongate member (81 ) are shown slidably coupled and inserted through a working lumen defined through an outer elongate member, or "sheath member", (79). Also depicted are the outer instrument base housing (75) and a clamp (83) configured to assist with coupling to aspects instrument driver (40 - such as that shown in Figure 1 ). Figure 4B is a cross sectional view of the instrument assembly (42) depicted in Figure 4A. Referring to Figure 4B, the inner elongate member (81 ) is threaded through a working lumen (181 ) defined by the outer elongate member (79). The geometric interaction of the outer elongate member working lumen (181 ), having a substantially square cross sectional shape with rounded corner surfaces (99), and the outer shape of the inner elongate member (81 ), which in the depicted embodiment has a square cross sectional outer shape with rounded corners (97), is designed to allow for slidable coupling of the two elongate members (for example, to allow insertion of one relative to the other without a great degree of load applied), while also preventing relative rolling, or rotation, of the two elongate members relative to each other - at least in the areas where they are coupled.

Referring again to Figure 4B, a relatively complex embodiment is shown for illustrative purposes, wherein the outer elongate instrument member (79) defines four lumens (89) for four control elements (85), such as metallic, semi-metallic, polymeric, or natural pull or pushwires, to enable relatively sophisticated steering of the outer elongate instrument member (79), when such control elements (85) are coupled to a distal portion of the outer elongate instrument member (79), and also coupled to actuator motors within an instrument driver (40) via a mechanical interfacing with rotatable members coupled to the outer instrument base housing (75). In other words, in one embodiment, the outer instrument may comprise a 4- wire electromechanically steerable sheath instrument capable of omnidirectional steering (for example, when three or four wires terminate at the same position distally), and capable of more complex shapes when one or more wires terminate more proximally than others. Preferably each wire is actuated utilizing an independently operable motor assembly in the instrument driver (40). In other embodiments, the outer instrument may be much more simple - for example, with only one, two, or even zero control elements. The outer (79) and inner (81 ) elongate instrument members may comprise polymeric coextrusions.

Referring again to Figure 4B, the depicted embodiment of the inner elongate instrument member is also relatively sophisticated, defining four instrumentation lumens (93) and a central, larger diameter, working lumen (91 ) preferably substantially aligned with the longitudinal axis of the inner elongate member (81 ) and sized to accommodate desired working tools, such as a mini-grasper tool, such as those available from suppliers such as Novare, Inc., or a collapsible basket tool, such as those available from suppliers such as Boston Scientific, Inc. Like the depicted embodiment of the outer elongate instrument member (79), the inner elongate instrument member (81 ) comprises four control elements (192), such as pushwires and/or pullwires made from metallic, semimetallic, polymeric, or natural materials, threaded through four control element lumens (87). As described above in reference to the outer elongate member (79), this embodiment may be omnidirectionally steerable and/or capable of complex curvatures, via operable coupling of such control elements (191 ) between distal portions of the inner elongate member (81 ) and actuation motors within an instrument driver (40). In other embodiments, a simpler configuration comprising one, two, or three control elements (192) may be desired.

Referring again to Figure 4B, the four instrumentation lumens (93) defined within the depicted embodiment of the inner elongate instrument member (81 ) are configured to accommodate relatively fixed (in other words, the lumens are large enough to accommodate assembly of the instrument, but small enough to provide a relatively close fit thereafter to prevent significant relative motion) positioning of a light bundle (30) and video/optics bundle (32). Another instrumentation lumen (93) is more loosely and slidably coupled to a laser fiber (34), to allow for relative insertion, retraction, and sometimes roll (depending upon the curvature of the overall assembly) intraoperatively. The fourth instrumentation lumen (93) may be utilized as a saline or other fluid (for example, a contrast agent or medicinal fluid) infusion or flush channel (95) for intraoperative use. Referring to Figure 4C, in one embodiment, it is desirable that about twelve centimeters of a more flexible, steerable distal portion (105) of the inner elongate instrument member (81 ) be able to protrude out the distal end of the outer elongate instrument member (79), and that the inner elongate instrument member (81 ) be capable with such protrusion of forming a bend radius (103) of approximately eight millimeters, with a maximum bend angle (101 ) of approximately 250 degrees. Referring to Figure 4D, in one embodiment, it is desirable that the outer elongate instrument member (79) have a more flexible, steerable distal portion (109) approximately 2.5 centimeters in length (109), with a maximum bend angle (107) of approximately 120 degrees, defined as illustrated relative to the longitudinal axis of the unbent portion of the instrument member (79).

Referring to Figure 4E, a side view of the inner elongate instrument housing assembly (77) is depicted, showing at least two control element interface assemblies (132) protruding downward for removable coupling with instrument driver sockets that are coupled with actuator motors move the control elements within the elongate instrument and cause controlled bending or steering, in response to control signals generated in response to operator actions at the operator workstation (for example, the master input device). In image capture device member (1 1 1 ) is removably coupled to the housing (77) to provide coupling of the light bundle and optics bundle to the housing, and ports are provided for integrating flush, laserfiber, working tools, and irrigation with the inner elongate instrument assembly. As shown in Figure 4E, for example, a laser fiber interface, comprising an adjustable seal, is coupled to the housing (77), as is a tubular flush interface (1 15), and a working lumen interface comprising an adjustable seal arranged adjacent a purging port (172). Referring to Figure 4F, a bottom portion of an inner elongate instrument base (132) partial assembly is depicted to show how the various components may be intercoupled. For example, the inner instrument elongate member (81 ) is coupled to the inner elongate instrument base (132) assembly and has a proximally coupled working instrument port (170) with adjustable seal and purge port (172). Apertures (1 19) are defined within the wall of the inner elongate instrument member (81 ) to facilitate routing of the control elements (192) from their distal coupling locations within the elongate member (81 ), out the apertures, around pulleys comprising the control element interface assemblies (132) which also comprise drive axles configured to interface with instrument driver actuation sockets. Referring to Figures 4G and 4H, an embodiment of removable coupling between the image capture device / lighting member (1 1 1 ) is illustrated. Referring to Figure 4G, the image capture device / lighting member (1 1 1 ) is inserted and twisted in a combined motion (183) into the interface (1 13) defined into the housing (77), whereby a BNC type mechanical coupling is formed utilizing fixtures and fittings on the outer surface of the image capture device / lighting member (1 1 1 ) and interface (1 13), as shown in Figure 4H. Figure 4I depicts a photograph of such a coupling being conducted with the help of an operator's hand. Referring to Figures 4J-4L, sterility issues associated with such removable coupling of the image capture device / lighting member (1 1 1 ) are illustrated. Generally the inner elongate instrument assembly, including the housing (77), will be sterile when unwrapped for a medical procedure. Referring to Figure 4J, in one embodiment, sterility of the image capture device / lighting member (1 1 1 ) may be handled using a drape (123) having an optically translucent window (121 ) positioned to allow efficient optical signal transfer between the housing interface (1 13) and the image capture hardware (such as a camera chip) and lighting hardware (such as a fiber bundle termination) residing within the image capture device / lighting member (1 1 1 ); thus the image capture device / lighting member (1 1 1 ) may remain nonstehle. Referring to Figure 4K, the drape (123) of Figure 4J may be avoided with the depicted embodiment wherein the image capture device / lighting member (1 1 1 ) and associated elongate couplings (30, 32) are sterile (125). Referring to Figure 4L, another draping (123) embodiment is depicted, but in this variation, rather than having a translucent window as in the embodiment of Figure 4J, the nonstehle image capture device / lighting member (1 1 1 ) is simply kept out of contact with the housing (77) by virtue of a precision sterile fitting (127) configured to couple the drape, image capture device / lighting member (1 1 1 ), and housing interface (1 13) without allowing direct contact between the image capture device / lighting member (1 1 1 ) and the housing interface (1 13).

Referring to Figure 5, in one embodiment it is desirable to have an inner elongate instrument assembly that is controllably lockable. Such a lockable embodiment may be useful and desirable, for example, after an instrument assembly has been advanced to a targeted tissue structure theater, such as the renal pelvis, to enable the operator to controllably lock one or more of the segments (90, 92, 94, 96, 98, for example) relative to each other, to provide a predictable conduit for the working tool or catheter assembly (88) which may be passed through the working lumen of such lockable catheter assembly and exposed distally (154), where the distal portion (154) may be utilized for diagnosis and/or intervention. Such a locked conduit may not only provide a predictable pathway for accessing the desired interventional theater, but also may descrease loads required to navigate working tools and/or catheters, and improve their steerability and maneuverability within such theather.

Referring to Figures 6A-6U, various aspects of diagnostic and/or interventional procedures and technologies are illustrated in reference to a urological clinical example. Referring to Figure 6A, an inner instrument elongate body (81 ) and outer instrument elongate body (79), slidably assembled together, are inserted through the urethra of a female patient (129) to access the bladder. Referring to Figure 6B, a similar instrument assembly is inserted through the urethra of a male patient, and through the prostate gland (141 ). Referring to Figure 6C, the instrument assembly may be further advanced through the bladder, into one of the ureters (133) to access the pelvis (143) of the kidney (131 ). As shown in Figure 6C, the optics bundle preferably has a forward-oriented field of view (147) with an included angle of about 80 degrees. Also shown in Figure 6C is an expandable support member (145), such as an inflatable balloon, configured to controllably expand out against the walls of adjacent tissue structures and provide stability to the instrument assembly once the outer elongate instrument member (79) has been at least temporarily desirably placed (should movement be required, the operator may controllably retract or deflate such expandable support member 145). Referring to Figure 6D, contrast agent (149) may be injected through the irrigation channel (95) and into the calices of the kidney (131 ) to facilitate fluoroscopic examination of the region. Referring to Figure 6E, such a contrast agent utilization may reveal a geometric envelope (151 ) illustrating the volume of the inside of the kidney (131 ), as in the depicted fluoroscopy image (153). Utilizing bi-plane or multiplanar fluoroscopy images, a knowledge of the plane angles, and segmentation and registration techniques, the inside of the kidney may be turned into a mathematical model (for example, using a triangular mesh to model the surface), registered to the navigation environment and coordinate system of the robotic catheter assembly, and utilized for navigation of the instrumentation. Further imaging modalities may also be used preoperatively, intraoperatively, or postoperatively, as illustrated in the flow chart of Figure 6F.

Referring to Figure 6F, preoperative imaging, such as transcutaneous or endolumenal ultrasound, fluoroscopy, radiography, computed tomography, and/or magnetic resonance imaging may be utilized to generate images of pertinent anatomy, and these images maybe turned into models, voxel volumes, triangular mesh surfaces, and the like (155). The instrument system may be navigated into the urethra (157), then into the bladder (159), into the ureter (161 ), and to the kidney in the region of the pelvis of the kidney and/or proximal ureter (163). During all of this navigation, and during the entire procedure, for that matter, intraoperative imaging may be conducted to have confirmation regarding positioning of various instrumentation aspects, utilizing, for example, the light and imaging bundles on board the instrument assembly, fluoroscopy, ultrasound, etc. In the depicted embodiment, the catheter assembly, once in a desirable home position in the targeted kidney anatomic theater, may be stabilized (165), using, for example, a lockable spine mechanism or an expandable member such as a balloon. Preoperative and intraoperative images may be registered to the coordinate system of the robotic catheter assembly, so that the catheter may be navigated instinctively relative to such images and/or models (167). Newer intraoperative images may be utilized to improve upon or supplement the images, models, surfaces, etc derived from preoperative analysis, or earlier intraoperative activity (169). The system is then in one configuration for a complex diagnostic or interventional process, such as a kidney stone intervention (171 ). Referring to Figures 6G-6N, a kidney stone intervention in one of the middle calices of a kidney utilizing one embodiment of the subject invention is illustrated. Referring to Figure 6G, the inner elongate instrument assembly (81 ) preferably is electromechanically advanced and navigated, subject to commands initiated by the operator at the operator workstation (for example, with a master input device or pendant) and executed by the computing system and instrument driver, toward the kidney stone (155) of interest. The forward-oriented field of view (147) of the optics bundle and lighting by the light bundle provide additional feedback to the operator through the displays on the operator workstation, which present images from the video system, as described in reference to Figure 1. A working tool such as a collapsible basket tool may be utilized to capture stones. For example, referring to Figures 6H and 6I, a typical collapsible basket tool assembly (169) comprises a proximal actuation handle (171 ), a flexible elongate body (173), and a distally located, controllably collapsible, basket (175). Such tools are available from suppliers such as Boston Scientific Corporation, CR Bard Corporation, and Cook Medical, Inc. Figure 6I depicts a close up view of the distally located basket (175). Referring to Figure 6J, the basket (175) is advanced forward, preferably through the field of view (147), to capture the stone (155). Such advancing may be conducted by manual contact with the basket tool through the working lumen port of the inner elongate instrument assembly, or via operable coupling with an insertion/retraction and/or actuation means, such as a motor-based instrument actuator. Referring to Figure 6K, the basket (175) and inner elongate instrument assembly (81 ) are retracted proximally toward the outer elongate instrument assembly (79), and, as illustrated in Figure 6L, the laser fiber tip (177) may be advanced forward (either manually or electromechanically, as described above in reference to the basket tool), preferably into the field of view (147) for optical confirmation of the intervention, and utilized to incrementally destroy the stone (155) via controlled emission of laser- based energy into the stone, preferably as controlled by the operator at the operator workstation using an input device such as a foot pedal, pendant button, or master input device command. Figure 6M depicts a typical laser fiber (34) tool having a proximal coupling element (179) configured to interface with the laser system and a distal tip (177) configured to emit laser-based energy to destroy items such as kidney stones. Referring to Figure 6N, preferably a stone is attacked with the laser tip in a pattern, to incrementally break the stone into smaller pieces of sub-critical geometry. For example, referring to Figure 6N, a "painting" pattern may be utilized wherein the laser tip addresses the stone (155) from point A (157) to point B (159), then from point C (161 ) to point D (163), then from point E (165) to point F (167), and so on.

Referring to Figures 60 to 6T, another stone intervention embodiment is illustrated wherein the subject stone (155) is located in the lower pole of the kidney (131 ), as depicted in Figure 60. The inner elongate instrument (81 ) may be advanced toward the stone (155), captured with a working tool such as a grasper or basket tool, as shown in Figure 6P, withdrawn toward a central working location, such as the pelvis of the kidney, as depicted in Figures 6Q and 6R, and incrementally destroyed with controlled advancement and actuation of the laser tip (177), as depicted in Figure 6S. Subsequently, the entire tool assembly may be withdrawn, as depicted in Figure 6T.

Referring to Figure 6U, aspects of such intervention embodiments are illustrated in a flow chart. After an instrument is navigated toward a targeted stone (181 ), it may be captured with a working tool (185). Intraoperative imaging may be utilized throughout the procedure (183) for confirmation of relative locations of instruments, tissue structures, and the stone. The stone may be pulled proximally toward the inner elongate instrument tip (187), and the inner elongate instrument itself may be retracted toward the distal portion of the outer elongate instrument tip for an easier, and potentially safer, working environment (189) for destroying the stone incrementally (191 ). Stone remnants of nonchtical size may be released or left in place (193), and the instrument assembly may be withdrawn from the kidney and ureters after collapsing, unlocking, and/or withdrawing any expanded or locked stabilizing structures.

As described above, various medical instruments or tools, such as laser fibers, guidewires, collapsible basket tools, injection tools, and balloon inflation tools, may be electromechanically actuated to perform as part of the subject system. Such actuation may take the form of electromechanically assisted insertion and/or retraction, roll actuation, tool actuation, injectible actuation, and/or manual instrument interface actuation for one or more instruments, simultaneously. For illustrative purposes, embodiments of such actuation modes are illustrated serially in Figures 7A-12C. It is important to note that such modes may be combined to, for example, both controllably insert and roll a subject instrument.

Referring to Figures 7A-7D, four electromechanical insertion and/or retraction modalities are depicted for a tool, here a guidewire (200), in relation to a flexible catheter set (79, 81 , 75, 77). Referring to Figure 7A, a set of pinch roller wheels (218, 220) is interfaced with the proximally exposed aspect of the guidewire (200) and configured to insert or retract the guidewire (200) relative to the catheter set (79, 81 , 75, 77) in accordance with rotational actuation imparted to one or both of the pinch roller wheels by one or two motors (not shown), each of which preferably is associated with an encoder to detect rotational motion with high precision. In an embodiment wherein one or both pinch roller wheels (218, 220) are rotationally actuated by motors, and rotation thereof is detected by two independent encoders, slippage may be detected as differences in the rotations, and insertion/retraction force imparted upon the guidewire (200) or other tool shaft may be backed out given a predetermined relationship between slippage and axial load. The pinch roller wheel assembly (216) preferably is mounted to an instrument driver or catheter instrument housing. In another embodiment wherein one pinch roller wheel is actively rotated and the other is passively rotated, encoders on both may similarly assist in the detection of slippage between the tool shaft and the pinch roller wheels to determine or estimate insertion/retraction load. In the depicted embodiment, load sensors (336, 338) assist in the sensing of forces applied normally to the surface of the guidewire, which also may be utilized in the aforementioned insertion/retraction force estimation technique, as friction forces are proportional to surface normal forces and friction coefficients. Insertion/retraction loads may also be estimated from predetermined relationships between applied motor current and insertion/retraction deflection. Such sensed information preferably is returned electronically to the controller, to enable load control loops, haptic feedback to the operator through a haptic master input device, safety monitoring, and other control and operational features.

Referring to Figure 7B, another embodiment is depicted featuring a lead screw assembly (222) to actuate insertion/retraction of a tool. As shown in Figure 7B, a coupling sleeve (228) is configured to be removably coupled to a proximally exposed aspect of the tool, here a guidewire (200). Such removable coupling may be the result of changeable inner geometric features of the coupling sleeve (228), such as set screws, inflatable balloon lumens, electromagnetically movable locking features movable relative to the sleeve body, and the like. The sleeve (228) is coupled to a lead screw (226), which is coupled to a motor (224) and encoder (not shown) configured to monitor rotation of the motor and thereby translation of the lead screw, sleeve, and guidewire, in accordance with the pitch configuration of the lead screw (226). A load cell (not shown) may be utilized to sense insertion/retraction forces, or such loads may be backed out of the system utilizing relationships between motor current and insertion/retraction deflection.

Referring to Figure 7C, a similar coupling sleeve (228) is depicted removably coupled to a proximally exposed aspect of a guidewire (220). Coupled to the sleeve to impart axial deflection is a recirculatory tension member (234), such as a belt or cable, which may be recirculated in one of two directions about a simple network of pulleys (230) and a motor capstan (232) directly coupled to a motor, and preferably an encoder to sense rotational positioning and thereby tension member (234), coupling sleeve (228), and tool shaft deflection. The depicted embodiment features an looped type recirculatory tension member (234) capable of being infinitely recirculated; in another embodiment, the recirculatory tension member (234) may comprise an incomplete loop, capable of a certain prescribed range of motion, but not infinite recirculation. A load cell (not shown) placed on a rotational idler pulley (230) or capstan (232) suspension may be used to sense tension in the tension member (234) and thereby insertion/retraction load. Loads may also be backed out of the system utilizing relationships between motor current and insertion/retraction deflection.

Referring to Figure 7D, another coupling sleeve (228) is depicted removably coupled to a proximally exposed aspect of a guidewire (220). Coupled to the coupling sleeve is an exposed pin (240) configured to rotatably and slidably interface with a scotch yoke member (238) which is coupled to a rotating motor (244) by an arm member (242). As the motor is rotated clockwise or counterclockwise, insertion or retraction loads are imparted through the arm, yoke, pin, and sleeve to the guidewire (220). Load or torsion sensors, or motor current may be utilized to determine imparted insertion/retraction loads. Referring to Figures 8A-9B, roll deflection, or rotational deflection, actuation configurations are depicted for elongate instruments placed through lumens of the above described steerable instrument assembly (79, 81 , 75, 77). Referring to Figure 8A, a configuration similar to that depicted in Figure 7A is depicted, with the exception that a roll actuation assembly (246) is coupled to a proximally exposed aspect of the depicted guidewire (200). Figure 8B illustrates a close up cross sectional view of the roll actuation assembly (246) coupled to the guidewire (200). Referring to Figure 8B, two roll engagement members (248, 250) are moved (258, 260) in opposite directions in planes parallel to each other and parallel to the axis of roll rotation (256) of the guidewire (200) coupled between them. The deflections (258, 260) may both be actively actuated, as in the illustrated embodiment with two lead screw (224) and motor (226) assemblies coupled to the assembly (246) housing (262). Alternatively, one of these defections (258, 260) may be passive. The motors (226) preferably are associated with encoders to sense the deflections (258, 260). One or more load cells may be placed in line with one or both lead screws (224) to detect imparted loads, and motor currents also may be utilized in the determination of deflection load imparted. In the depicted embodiment, the roll engagement contract surfaces (252, 254) of the roll engagement members (248, 250) are planar. In another embodiment, they may be nonplanar surface portions of, for example, larger pulleys or capstans, such as those depicted in Figure 7A.

Referring to Figure 9A, another roll subassembly (246) embodiment is depicted coupled to the exposed proximal aspect of a guidewire (200). Figure 9B illustrates a close up cross sectional view of the assembly (246) as interfaced with the tool shaft, here a guidewire (200) shaft. Referring to Figure 9B, the guidewire shaft (200) preferably is removably coupled within a coupler (264) by a plurality of spaced apart coupling members (280, 282, 284) configured to be controllably engaged upon the guidewire shaft (200) using set screws, inflatable features, electromagnetically movable features, and the like. When engaged upon the guidewire shaft (200), rotation of the coupler (264) rotates the guidewire. The coupler (264) preferably is rotatably coupled to a housing (272) using a plurality of bearings (266) coupled in place relative to the housing by mounting members (268, 270), and may be rotationally actuated relative to the housing with a flexible tension member (234), such as a belt or cable, which preferably is routed around a capstan (278) and actuator motor/encoder assembly 274) also coupled (276) to the housing (272). Rotational loads or torques applied upon the shaft may be determined utilizing motor currents, encoder readings, and/or load cells associated with idler pulley (not shown) or capstan (278) suspension elements.

Referring to Figure 1 OA, a grasper tool (202) is depicted positioned through a lumen of an instrument set (79, 81 , 75, 77). The illustrated grasper tool (202) embodiment comprises a proximal shaft and a grasper end effector (214) that is spring-biased to stay in an open configuration unless closed by tension on a tension actuation member (288) that leads to a proximal exposure, as depicted in Figure 10A. In another embodiment, a grasper tool spring biased to stay closed may be utilized, with a tension or compression actuation member configured to open or close the grasper end effector; similarly, in other embodiments, scissors and other tools may be actuated. Referring to Figure 10A, the tension actuation member (286) may be inserted or retracted, for example, in accordance with each of the insertion/retraction embodiments described in reference to Figures IfK-ID. A motorized (224) lead screw (226) variation is depicted in Figure 10A. Figure 10B depicts a similar embodiment, wherein the grasper tool (202) end effector (214) is spring biased to stay closed unless pushed open with a compression actuation member (288), such as an elongate push rod. As shown in Figure 10B, the compression actuation member may be electromechanically inserted or retracted, for example, in accordance with the insertion/retraction embodiments described in reference to Figures IfK-ID. A motorized (224) lead screw (226) variation is depicted in Figure 10B.

Referring to Figures 1 1A and 1 1 B, injection actuation embodiments are depicted, wherein an electromechanical subassembly is utilized to controllably inject fluid from a reservoir (296) to the distal end of an instrument, which in Figure 1 1A comprises an injection needle (208), and in Figure 1 1 B comprises an inflatable balloon (212) similar to the expandable stabilizer (145) described above, but located at the distal tip of the illustrated elongate instrument. Injectable fluids may comprise contrast agents, saline, medicines or treatment solutions, inert gases, carbon dioxide, and the like. Preferably the injection actuation assembly (290) comprises a fluid reservoir (296) encapsulated by a reservoir structure (298) and a piston (300), the piston being electromechanically movable relative to the reservoir structure (298) by a translation actuation means, such as those described in reference to Figures 7A-7D, to produce increased or decreased pressure in the reservoir, and thereby variations of injection or suction at the distal end of the instrument through a fluid coupling (via lumens defined in tubular couplings and the elongate instrument body) between the reservoir and the distal aspect of the instrument. A motorized (224) lead screw (226) assembly is shown in each of the assemblies in Figures 1 1A and 11 B. Preferably a pressure sensor (294) is located in line with the fluid coupling between the reservoir (296) and distal portion to detect output pressures from the piston (300) and reservoir structure (298) configuration, to allow for closed loop control of applied injection or suction profiles versus time, utilizing the computerized system controller. Precise volumes and pressure versus time profiles may be produced with such system, to allow for precision injection of contrast agent, medicines, saline, gases, and the like, as described above.

Referring to Figures 12A-12C, embodiments for electromechanically actuating proximal interfaces configured for manual (i.e., by human hand) actuation. Referring to Figures 12A-12C, a conventional endoscopic tool comprising a dissection scissor tip (206) and proximal manual actuation interface (306) is depicted threaded through a steerable instrument assembly (79, 81 , 75, 77). Other manual actuation interfaces (i.e., other than the scissor type finger eyelets depicted in Figures 12A-12C), such as knobs, sliding interfaces, and the like, may also be electromechanically actuated utilizing these techniques. Referring to Figure 12A, two substantially square pin matrix platforms (326), similar to those available from manufacturers such as Endeavor Tool Company of Boylston, MA, under the tradename, "Gator Grip", may be pressed against and conformed around the two handle portions (302, 304) in a direction substantially orthogonal to the desired plane of rotation (312, 314) relative to an axis of rotation (316) of the handle portions (302, 304), or Cartesian translation (318, 320) of the handle portions (302, 304). Preferably the Cartesian (318, 320) and/or rotational (312, 314) motion imparted to the handle portions (302, 304) is conducted with one of the aforementioned electromechanical displacement configurations. For example, in one embodiment, independent Cartesian translation (318, 320) of each handle portion (302, 304) is produced approximately in the plane of the page of Figures 12A and 12B utilizing a stack of two motorized lead screw assemblies to produce X-Y deflection. Rotational motion (312, 314) may be actuated with two independent motors having rotational axes approximately coincident with the axis of rotation of the handle portions (302, 304), and arm members (not shown) coupling the motors to the pin platforms (326). In some embodiments, it is desirable to provide such rotational motion using a torquable coupling interposed between a motor interface and the instrument interface that is specifically configured to allow for some misalignment between the axis of rotation of the actuator motor and the axis of rotation of the fitting associated with the instrument interface, such as a Schmidt type mechanical movement coupling. Figure 12B depicts an embodiment wherein simple post elements (322, 324) are utilized rather than pin arrays to engage the handle portions (302, 304). Figure 12C depicts an embodiment wherein a separate motorized (224) lead screw (226) assembly is coupled between a housing (330) and each of the handle portions (302, 304) for direct engagement, via a pair of coupling figures (328) and electromechanical actuation of the tool.

Claims

Claims:

1. A robotic catheter system, comprising:

a. a robotically steerable catheter instrument comprising a housing and an elongate flexible body, the elongate flexible body defining one or more instrument lumens longitudinally therethrough;

b. an electromechanical instrument driver comprising a housing, a

plurality of motors, and an instrument interface configured to removably engage the catheter instrument housing and transfer a plurality of steering actuations to the catheter instrument when engaged thereto; c. an elongate medical instrument slidably positioned through one of the one or more instrument lumens;

d. an electromechanical device actuation assembly coupled to the

proximal end of the elongate medical instrument and configured to actuate the medical instrument independently of steering actuations transferred to the robotically steerable catheter instrument; and e. a controller configured to operate the instrument driver and device actuation assembly to respectively steer the catheter instrument and actuate the elongate medical instrument subject to commands imparted by an operator to a master input device operably coupled to the controller.

2. The catheter system of claim 1 , wherein the one or more instrument lumens are configured to separately and simultaneously accommodate an optics bundle, a light bundle, and a laser fiber, and to define a flush channel.

3. The catheter system of claim 1 or 2, wherein the instrument housing

comprises an optics bundle connection interface.

4. The catheter system of claim 1 or 2, wherein the instrument housing

comprises a light bundle connection interface.

5. The catheter system of claim 1 or 2, wherein the instrument housing comprises a laser fiber coupling interface.

6. The catheter system of any of claims 1 -5, wherein the instrument housing comprises a flush channel supply interface.

7. The catheter system of any of claims 1 -6, wherein one of the one or more instrument lumens is sized to accommodate slidable coupling of a collapsible basket tool.

8. The catheter system of claim 4, wherein the optics bundle connection

interface comprises a translucent light transmission interface between fibers comprising the optics bundle in the housing and fibers comprising an external optics bundle coupled to a video processing device.

9. The catheter system of claim 4, wherein the optics bundle connection

interface comprises a translucent light transmission interface between fibers comprising the optics bundle in the housing and a digital image capture chip.

10. The catheter system of any of claims 1 -9, wherein the elongate flexible body comprises a substantially square cross sectional shape having corners.

1 1. The catheter system of claim 10, wherein the corners are rounded in shape.

12. The catheter system of claim 10, wherein the elongate flexible body defines four integrated instrument lumens arranged immediately adjacent the corners.

13. The catheter system of claim 12, wherein the elongate flexible body defines four control wire lumens arranged between the four integrated instrument lumens, and wherein the working instrument lumen has a diameter which is greater than that of the integrated instrument lumens, and wherein the control wire lumens have a diameter which is smaller than that of the integrated instrument lumens.

14. The catheter system of claim 2, wherein the elongate body has a first portion with a first flexibility and a second portion extending distally from the first portion, the second portion having a second flexibility substantially greater than the first flexibility.

15. The catheter system of claim 2, further comprising a flexible sheath body defining a working lumen sized to accommodate slidable engagement of the elongate flexible body, and an outer cross sectional shape that is substantially circular, wherein the shape of the working lumen of the sheath body and outer shape of the elongate flexible body are jointly configured to limit rotational movement of the elongate flexible body relative to the sheath body.

16. The catheter system of any of claims 1-15, wherein the device actuation

assembly is configured to controllably insert and retract the medical instrument relative to the catheter instrument.

17. The catheter system of claim 16, wherein the device actuation assembly

comprises two or more pinch roller wheels movably coupled to the medical instrument.

18. The catheter system of claim 16, wherein the device actuation assembly

comprises a lead screw assembly coupled to the medical instrument.

19. The catheter assembly of claim 16, wherein the device actuation assembly comprises a recirculatory tension member assembly movably coupled to the medical instrument.

20. The catheter assembly of claim 16, wherein the medical instrument is

selected from the group consisting of a laser fiber, a guidewire, a collapsible basket tool, a flexible needle, a grasper, and a balloon tool.

21. The catheter system of any of claims 1-15, wherein the device actuation assembly is configured to controllably roll the medical instrument relative to the catheter instrument.

22. The catheter system of claim 21 , wherein the device actuation assembly

comprises two surfaces configured to engage opposite sides of the medical instrument, and to roll the medical instrument as at least one of such surfaces is moved relative to each other through a motion plane substantially parallel to an axis of roll motion defined as the medical instrument is rolled.

23. The catheter system of claim 22, wherein one of the two surfaces is

substantially planar.

24. The catheter system of claim 22, wherein one of the two surfaces comprises a pinch roller wheel surface.

25. The catheter system of claim 21 , wherein the device actuation assembly

comprises a rolling subassembly that is coupled to a coupling element configured to removably and fixedly couple to the medical instrument, and wherein the rolling subassembly is rotatably coupled to a base element configured to not rotate relative to the instrument driver.

26. The catheter system of claim 21 , wherein the medical instrument is selected from the group consisting of a laser fiber, a guidewire, a collapsible basket tool, a flexible needle, a grasper, and a balloon tool.

27. The catheter system of any of claims 1-15, wherein the device actuation

assembly comprises an elongate tension element operably coupled between an actuator coupled to a housing of the device actuation assembly and a distally operable element of the medical device such that activation of the actuator creates tension in the tension element and a pulling actuation of the distally operable element, wherein the distally operable element is selected from the group consisting of a grasper closure element, a grasper opener element, a collapsible basket collapse element, and a collapsible basket expand element.

28. The catheter system of any of claims 1-15, wherein the device actuation

assembly comprises an elongate compression element operably coupled between an actuator coupled to a housing of the device actuation assembly and a distally operable element of the medical device such that activation of the actuator creates compression in the tension element and a pushing actuation of the distally operable element, wherein the distally operable element is selected from the group consisting of a grasper closure element, a grasper opener element, a collapsible basket collapse element, and a collapsible basket expand element.

29. The catheter system of claim 1 , wherein the device actuation assembly

comprises an injection pump fluidly coupled with one of the lumens defined through the elongate flexible body and configured to inject or suction out fluid through said lumen.

30. The catheter system of claim 29, wherein the medical instrument comprises a balloon tool or a flexible needle.

31. The catheter system of any of claims 1-30, wherein the medical instrument has a proximal end comprising a manual control interface, and wherein the device actuation assembly comprises one or more fittings configured to removably couple to one or more portions of the manual control interface to substantially reproduce relative motions of such portions when operated manually.

32. The catheter system of claim 31 , wherein at least one of said one or more fittings comprises a pin array or a post array.

33. The catheter system of claim 31 , wherein at least one of said one or more fittings is coupled to a motion subassembly selected from the group consisting of an assembly of one or more leadscrews and a recirculatory tension member assembly.

34. The catheter system of claim 31 , wherein at least one of said one or more fittings is coupled to an assembly of two lead screws configured to move orthogonally relative to each other.

35. The catheter system of claim 31 , wherein at least one of the one or more

fittings is configured to be electromechanically rotated relative to other portions of the manual control interface, and wherein the device actuation assembly comprises a torquable coupling configured to allow for misalignment between an axis of rotation of a rotation actuator providing electromechanical rotation and an axis of rotation of the fitting configured to be

electromechanically rotated.

36. The catheter system of claim 35, wherein the torquable coupling comprises a Schmidt type coupling.

37. A flexible instrument assembly, comprising: a. an elongate flexible body defining a plurality of integrated instrument lumens longitudinally therethrough, as well as an interchangeable working instrument lumen therethrough which is positioned approximately coincident with the longitudinal axis of the elongate flexible body;

b. an instrument housing coupled to a proximal portion of the elongate body;

c. a plurality of radially spaced-apart control wires coupled to a distal end portion of the elongate flexible body, the control wires extending proximally through a wall of the elongate body and out at least one opening defined by the proximal end of said elongate body; and d. a plurality of control wire interface assemblies carried in the instrument housing, each interface assembly comprising a pulley that is rotatable relative to the housing, the guide instrument control wires each having a proximal end extending out of the at least one opening defined by the proximal end of the elongate body and wound onto a respective pulley, such that movement of the guide instrument distal end may be controlled by rotational movement of the one or more pulleys.

38. The flexible instrument assembly of claim 37, wherein the plurality of

instrument lumens are configured to separately and simultaneously accommodate an optics bundle, a light bundle, and a laser fiber, and to define a flush channel.

39. The flexible instrument assembly of claim 37, wherein the instrument housing comprises one or more of an optics bundle connection interface, a light bundle connection interface, and a laser fiber coupling interface.

40. The flexible instrument assembly of any of claims 35-39, wherein the

instrument housing comprises a flush channel supply interface.

41 . The flexible instrument assembly of any of claims 35-40, wherein the working instrument lumen is sized to accommodate slidable coupling of a collapsible basket tool.

42. The flexible instrument assembly of claim 37, wherein the instrument housing comprises an optics bundle connection interface, the optics bundle connection interface comprising a translucent light transmission interface between fibers comprising the optics bundle in the housing and fibers comprising an external optics bundle coupled to a video processing device.

43. The flexible instrument assembly of claim 37, wherein the instrument housing comprises an optics bundle connection interface, the optics bundle connection interface comprising a translucent light transmission interface between fibers comprising the optics bundle in the housing and a digital image capture chip.

44. The flexible instrument assembly of of any of claims 37-43, wherein the elongate flexible body comprises a substantially square cross sectional shape having corners.

45. The flexible instrument assembly of claim 44, wherein the corners are

rounded in shape.

46. The flexible instrument assembly of claim 55, wherein the elongate flexible body defines four integrated instrument lumens arranged immediately adjacent the corners, and wherein the elongate flexible body defines four control wire lumens arranged between the four integrated instrument lumens.

47. The flexible instrument assembly of claim 46, wherein the working instrument lumen has a diameter which is greater than that of the integrated instrument lumens, and wherein the control wire lumens have a diameter which is smaller than that of the integrated instrument lumens.

48. The flexible instrument assembly of claim 37, wherein the respective control wire interface assemblies each comprise a mechanical fitting coupled to or defined into the respective pulley, each mechanical fitting configured to engage a respective motor drive assembly.

49. The flexible instrument assembly of claim 37, wherein the elongate body has a first portion with a first flexibility and a second portion extending distally from the first portion, the second portion having a second flexibility substantially greater than the first flexibility.

50. The flexible instrument assembly of claim 37, further comprising a flexible sheath body defining a working lumen sized to accommodate slidable engagement of the elongate flexible body, and an outer cross sectional shape that is substantially circular.

51 . The flexible instrument assembly of claim 50, wherein the shape of the working lumen of the sheath body and outer shape of the elongate flexible body are jointly configured to limit rotational movement of the elongate flexible body relative to the sheath body.

52. A robotic instrument system, comprising: a. an operator workstation comprising one or more displays and one or more input devices;

b. a controller operatively coupled to the operator workstation;

c. an instrument driver operatively coupled to the controller, the

instrument driver comprising one or more motors operatively coupled to an instrument interface and being operably coupled to and supported by a lockably mobile instrument driver base configured to rest upon a floor of an operating room adjacent a patient; and

d. an elongate flexible guide instrument having a longitudinal axis and a base portion operably coupled to the instrument interface; wherein the controller is configured to selectively actuate the one or more motors to thereby selectively move a distal end portion of the guide instrument in response to control signals generated, at least in part, by the one or more input devices.

53. The system of claim 52, wherein the instrument driver is rotatable relative to the mounting structure.

54. The system of claim 52, wherein the instrument driver, when mounted upon the mounting structure, is substantially fixed relative to the mounting structure.

55. The system of claim 52, wherein the instrument driver is mechanically

integrated into the mounting structure.

56. The system of claim 53, wherein the mounting structure comprises at least one configurable revolute braked joint.

57. The system of claim 56, wherein the at least one configurable revolute braked joint is an electronically braked joint.

58. A method for conducting a kidney stone intervention, comprising: a. advancing a distal tip of a robotically-steerable catheter assembly through a ureter to a position inside of the kidney adjacent a kidney stone, the catheter assembly comprising an electromechanically steerable elongate body coupled to a light bundle, an image capture device having a field of view, and a laser fiber, the elongate body defining a flush lumen and a working tool lumen which is positioned substantially coincident to a longitudinal axis of the elongate body; b. utilizing light projected from the light bundle and received within the field of view of the image capture device to confirm the position of a kidney stone relative to the distal portion of the catheter assembly; c. advancing a stone capture device through the working lumen and at least a portion of the field of view of the optics bundle, capturing the stone, and pulling it proximally toward the distal end of the elongate body wherein it can be viewed within at least a portion of the field of view of the image capture device and held substantially in place by the stone capture device;

d. advancing the laser fiber into contact with the kidney stone; and e. destroying at least a portion of the kidney stone with energy delivered by the laser fiber.

59. The method of claim 58, wherein advancing comprises electromechanically moving a carriage on an instrument driver toward the patient in response to signals generated by an operator with a master input device, the carriage being removably coupled to a housing comprising the proximal end of the robotically steerable catheter assembly.

60. The method of claim 58 or 59, wherein the stone capture device comprises a collapsible basket, and wherein pulling the basket proximally causes it to collapse upon and capture the stone.

61 . The method of claim 58 or 59, wherein the stone capture device comprises a grasper.

62. The method of any of claims 58-61 , wherein the act of advancing a stone capture device comprises actuating a motor as commanded by an operator.

63. The method of any of claims 58-62, wherein the act of advancing a laser fiber comprises actuating a motor as commanded by an operator.

64. The method of any of claims 58-63, wherein destroying at least a portion of the kidney stone comprises delivering energy to the stone in an incremental patterned fashion.

65. The method of any of claims 58-64, further comprising registering an image of the kidney anatomy to an in situ coordinate system associated with navigation of the robotically-steerable catheter assembly.

66. The method of claim 65, wherein the image comprises a contrast agent

envelope image from fluoroscopy.

67. The method of claim 65, wherein the image comprises an image captured with an imaging modality selected from the list including fluoroscopy, radiography, computed tomography, magnetic resonance imaging, and ultrasound.

68. The method of any of claims 65-67, further comprising segmenting the image to generate a model of the imaged matter before registering it to the in situ coordinate system.

69. The method of claim 58, further comprising utilizing a real-time image capture device to observe the position of portions of the catheter assembly relative to other surrounding structures.

70. The method of claim 69, wherein the real-time image capture device is one selected from the list including endocorporeal ultrasound, transcutaneous ultrasound, and fluoroscopy.