JP7257385B2 - medical instruments - Google Patents

Description

The present invention relates to medical devices.

2. Description of the Related Art In medical practice, it is common practice to introduce a hollow medical elongate body such as a catheter into a biological lumen such as a blood vessel. When introducing a catheter, as a preparation, the lumen of the catheter is filled with physiological saline or the like to expel the internal air (bubbles) or the like. Such an action is called priming (see Patent Document 1).

U.S. Patent Application Publication No. 2017/333001

Although the priming operation is generally performed by an operator pushing a syringe, it is not easy to reliably remove air bubbles from, for example, a portion of the catheter where air bubbles tend to remain.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a medical instrument capable of more reliably removing air bubbles from a catheter device.

A medical device according to the present invention for achieving the above object comprises: a storage section capable of storing a liquid to be fed to a catheter device; a filling section communicating with the storage section and capable of receiving the liquid from the storage section; a gripping portion that can be gripped by a user's fingers; an operating portion that increases or decreases the internal pressure of the filling portion in accordance with the user's operation of applying a gripping force for gripping the gripping portion; and the internal pressure of the filling portion. a switching unit capable of switching between a state in which the accommodating portion and the filling portion are in communication and a state in which the accommodating portion and the filling portion are not in communication according to an increase or decrease in . The catheter device is provided with a lumen capable of moving back and forth through a drive shaft having a transducer unit for transmitting and receiving signals at the tip, and a communication hole at the tip that communicates the lumen with the outside. and a sheath having an outer surface exposed to face the exterior.

According to the above medical device, a predetermined amount of liquid (priming liquid) can be pumped to the catheter device each time the user performs an operation of gripping the grip portion and an operation of releasing the grip of the grip portion. Therefore, it is possible to more reliably remove air bubbles remaining in the catheter device.

1 illustrates a medical system including a medical instrument and a catheter device according to an embodiment of the invention; FIG. 2 is a cross-sectional view showing the distal end of the catheter device shown in FIG. 1; FIG. FIG. 2 is a cross-sectional view of the medical device shown in FIG. 1; FIG. 4 is a cross-sectional view showing a state in which the filling portion is filled with liquid from the state shown in FIG. 3 in the medical device of FIG. 1; FIG. 5 is a cross-sectional view showing a state in which the liquid filled in the filling portion is pushed out from the state shown in FIG. 4 for the medical device of FIG. 1; FIG. 6 is a cross-sectional view showing a state in which the filling portion is filled with a liquid from the state shown in FIG. 5 in the medical device of FIG. 1; 3 is a cross-sectional view showing the evacuation of air bubbles from the drive shaft of the catheter device shown in FIG. 2; FIG. FIG. 10 is a cross-sectional view showing a medical device according to a modified example of the present invention; FIG. 9 is a cross-sectional view showing a state in which the filling portion is filled with liquid from the state shown in FIG. 8 ; FIG. 10 is a cross-sectional view showing a state in which the liquid filled in the filling portion is pushed out from the state shown in FIG. 9;

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. The following description does not limit the technical scope or the meaning of terms described in the claims. Also, the dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from the actual ratios.

(First embodiment)
1 and 2 are diagrams showing a medical instrument 200 and a catheter device 100 primed by the medical instrument 200 according to a first embodiment of the present invention.

The medical instrument 200 according to this embodiment can be used, for example, when priming a catheter device 100 such as an ultrasound diagnostic catheter.

First, before describing the medical instrument 200, the medical system 1 including the catheter device 100 will be described. The medical system 1 has a catheter device 100, a medical instrument 200, and an external device 300, if outlined with reference to FIG. Details will be described below.

(catheter device)
A catheter device (image catheter) 100 according to the present embodiment is configured as an IVUS catheter that is applied to intravascular ultrasound diagnosis. Catheter device 100 is driven to perform a predetermined operation by being connected to external device 300 .

As shown in FIG. 1, the catheter device 100 is inserted into a sheath 110 inserted into a body cavity of a living body, an outer tube 120 provided on the proximal end side of the sheath 110, and the outer tube 120 so as to be movable forward and backward. and an inner shaft 130 .

As shown in FIGS. 1 and 2, the catheter device 100 includes a transducer unit 145 at its tip that transmits and receives signals, a drive shaft 140 that is rotatable and movable back and forth within the sheath 110, a sheath 110 and an outer sheath. and a relay connector 170 that connects the tube 120 .

Catheter device 100 also includes unit connector 150 that receives drive shaft 140 in its lumen, and hub 160 provided proximal to inner shaft 130 .

Hereinafter, the side of the catheter device 100 that is inserted into the body cavity will be referred to as the distal side, the hub 160 side will be referred to as the proximal side, and the extending direction of the sheath 110 will be referred to as the axial direction.

Drive shaft 140 extends through sheath 110 , relay connector 170 , outer tube 120 , inner shaft 130 and unit connector 150 to the interior of hub 160 .

The hub 160, the inner shaft 130, the drive shaft 140, and the vibrator unit 145 are configured to integrally move back and forth in the axial direction. Therefore, for example, when the hub 160 is pushed toward the distal side, the inner shaft 130 connected to the hub 160 is pushed into the outer tube 120 and the unit connector 150, and the drive shaft 140 and vibration are pushed. The child unit 145 moves inside the sheath 110 to the distal side. For example, when the hub 160 is pulled proximally, the inner shaft 130 is pulled out from the outer tube 120 and the unit connector 150 as indicated by the arrow a1 in FIG. moves proximally inside the sheath 110 as indicated by arrow a2.

When the inner shaft 130 is pushed all the way to the distal end, the distal end of the inner shaft 130 reaches the vicinity of the relay connector 170 . At this time, the transducer unit 145 is positioned near the tip of the sheath 110 .

As shown in FIG. 2, the drive shaft 140 includes a flexible tubular body 140a and a signal line 140b inserted through the tubular body 140a. The tubular body 140a can be composed of, for example, a multi-layered coil with different winding directions around the axis. Although the material of the coil is not particularly limited, examples thereof include stainless steel and Ni--Ti alloys. The signal line 140b can be composed of, for example, a twisted pair cable or a coaxial cable.

The transducer unit 145 includes an ultrasonic transducer 145a that transmits and receives ultrasonic waves, and a housing 145b that accommodates the ultrasonic transducer 145a.

The ultrasonic transducer 145a transmits ultrasonic waves as examination waves to the body cavity and receives ultrasonic waves reflected from the body cavity. The ultrasonic transducer 145a is electrically connected to an electrode terminal (not shown) via the signal line 140b.

A piezoelectric material such as ceramics or crystal can be used as the ultrasonic transducer 145a.

The sheath 110, as shown in FIG. 2, has a lumen 110a into which the drive shaft 140 is inserted so as to move back and forth. A guide wire insertion portion 114 provided in parallel with the lumen 110 a is attached to the distal end portion of the sheath 110 . The guidewire insertion portion 114 includes a lumen 114a through which the guidewire W can be inserted. The sheath 110 and the guide wire insertion portion 114 can be integrally configured by heat sealing or the like. The guide wire insertion portion 114 is provided with a marker 115 having X-ray imaging properties. The marker 115 is composed of a highly radiopaque metal coil such as Pt, Au, Ir.

As shown in FIG. 2, the distal end of the sheath 110 is formed with a communication hole 116 that communicates the inside and the outside of the lumen 110a. A reinforcing member 117 for supporting the guide wire insertion portion 114 is provided at the distal end portion of the sheath 110 . The reinforcing member 117 is formed with a communicating passage 117 a that communicates the communicating hole 116 with the interior of the lumen 110 a arranged on the proximal side of the reinforcing member 117 . Note that the reinforcing member 117 may not be provided at the distal end of the sheath 110 .

The communication hole 116 is provided for discharging gas such as air during priming. When using the catheter device 100, in order to reduce the attenuation of ultrasonic waves by the air in the sheath 110 and transmit and receive the ultrasonic waves efficiently, the priming liquid is priming inside the sheath 110 until it is released from the communication hole 116 to the outside. Inject liquid. As a result, gas such as air is discharged from the interior of the sheath 110 together with the priming liquid.

The sheath 110 is made of a material that is highly transparent to ultrasonic waves. The distal end portion of the sheath 110, which is the range in which the ultrasonic transducer 145a moves in the axial direction of the sheath 110, constitutes a portion having a higher ultrasonic permeability than other portions.

The sheath 110, the guide wire insertion portion 114, and the reinforcing member 117 can be made of a material having flexibility, and the material is not particularly limited. Examples include various thermoplastic elastomers such as styrene, polyolefin, polyurethane, polyester, polyamide, polyimide, polybutadiene, transpolyisoprene, fluororubber, and chlorinated polyethylene. One or a combination of two or more of them (polymer alloy, polymer blend, laminate, etc.) can be used. The outer surface of the sheath 110 can be provided with a hydrophilic lubricating coating layer that exhibits lubricity when wet.

(external device)
The catheter device 100 is connected to and driven by an external device (motor drive unit) 300, as shown in FIG. The external device 300 is connected to a connector portion 165 provided on the base end side of the hub 160 .

The external device 300 has a motor 300b that is a power source for axially moving the drive shaft 140, and a ball screw 300c that converts the rotational motion of the motor 300b into axial motion.

The operation of the external device 300 is controlled by a control device (console) 320 . The control device 320 includes a CPU, a memory, and the like as main components. Data acquired by catheter device 100 is processed by controller 320 . The data is also displayed on monitor 330 after being processed by controller 320 .

(medical equipment)
Next, a medical device (priming liquid injection device) 200 according to this embodiment will be described. 3 to 6 are diagrams for explaining the medical device 200 according to this embodiment.

3 to 6, the medical device 200 includes a housing portion 210, a filling portion 220, a grasping portion 230, an operating portion 240, a switching portion 250, a counting portion 260, and an elastic member 270. FIG. Details will be described below.

(Accommodation part)
The storage section 210 is provided to store a liquid (priming liquid) to be sent to the catheter device 100 . The housing portion 210 is configured as a space having a predetermined volume inside the housing B that constitutes the main body portion of the medical device 200 . Although the liquid used for priming is not particularly limited, for example, physiological saline can be used. In addition, it is preferable that the storage unit 210 is configured to be able to store 5 ml or more of liquid.

The storage section 210 is connected to, for example, a storage tank R (see FIG. 1) that supplies liquid to the storage section 210 through a predetermined tube T1. The storage tank R can be configured with, for example, a known syringe or the like capable of storing a predetermined volume of liquid. In addition, the housing part 210 has a check valve that allows the liquid to flow only from the storage tank R side to the housing part 210 side, a stopcock that can be opened and closed as necessary, etc. at the port portion connected to the tube T1. You may prepare.

(Filling part)
The filling section 220 communicates with the storage section 210 via the switching section 250 and is configured to be able to receive the liquid from the storage section 210 . The filling section 220 is formed as an internal space of the housing B that constitutes the medical device 200, like the housing section 210. As shown in FIG. The housing portion 210 is formed in a substantially rectangular parallelepiped space in this embodiment. Moreover, the filling part 220 is formed in a substantially cylindrical space in this embodiment. However, the specific shapes of the storage portion 210 and the filling portion 220 are not limited to the above as long as the liquid from the storage tank R can be temporarily stored.

As shown in FIG. 3 , the filling section 220 is provided with an on-off valve 221 that allows the liquid filled in the filling section 220 to flow toward the catheter device 100 . The on-off valve 221 opens when the internal pressure of the filling section 220 is increased by the pusher 241 of the operation section 240, and allows the inside of the filling section 220 and the tube T2 of the catheter device 100 to communicate with each other. The on-off valve 221 is maintained in a closed state in cases other than the above. Therefore, the user can automatically replenish the filling portion 220 with liquid in conjunction with the operation of gripping and releasing the gripping portion 230 .

The on-off valve 221 is configured by a known spring-equipped check valve in this embodiment. However, the on-off valve 221 is not limited to a specific structure as long as it can be opened when the internal pressure is increased by the pusher 241 and can be kept closed in other cases.

(Grip part)
The grip part 230 is configured as a part that can be gripped by the fingers of the user. When the user grips the grip portion 230, the grip portion 230 is applied with a pressing force from the power point a4 shown in FIG. In this embodiment, as shown in FIG. 4, the grip part 230 is configured to be rotatable with respect to the fulcrum a3, and is configured to include a rotating member capable of applying a pressing force of the user's fingers. By configuring the grip part 230 in this way, the pressing force applied by the user's fingers is transmitted to the pusher 241, and the internal pressure of the filling part 220 is increased, making it possible to deliver the liquid to the catheter device 100. . In addition, since the movement of the pusher 241 can be operated by gripping the grip portion 230 with fingers, a gripping force for moving the pusher 241 can be easily applied, and operability is improved. .

In addition, it is more preferable that the grip portion 230 has a shape that allows the user to hold each finger including the little finger and grip it firmly. Therefore, the grip portion 230 may be formed with concave grooves for hooking the fingers. By configuring the grip portion 230 in this way, liquid can be supplied to the filling portion 220 with a smaller force, thereby improving convenience.

(operation part)
The operation unit 240 increases or decreases the internal pressure of the filling unit 220 according to the user's operation of increasing the gripping force of gripping the gripping unit 230 and the user's operation of releasing the gripping of the gripping unit 230 . The operation unit 240 includes a pusher 241 and connecting members 242 and 243 as shown in FIG.

Pusher 241 is configured to be able to push the liquid filled in filling portion 220 toward catheter device 100 . The pusher 241 has a substantially cylindrical shape that matches the cross section of the filling section 220 at the portion that is arranged in the internal space of the filling section 220 in this embodiment. However, the specific shape of the pusher 241 is not particularly limited as long as the liquid filled in the filling portion 220 can be pushed out toward the catheter device 100 .

Connecting members 242 , 243 are provided to convert rotational motion produced by gripper 230 into translational motion of pusher 241 .

The connection member 242 is configured by an elongated plate member as shown in FIG. The connection member 242 is connected to the grasping portion 230 as a connection point a6 near one end, and is connected to the pusher 241 near the other end as an action point a5 for moving the pusher 241. As shown in FIG. As shown in FIG. 4, the distance from the force point a4 where the user applies the pressing force to the fulcrum a3 is longer than the distance from the action point a5 to the fulcrum a3. The connection member 242 retracts the pusher 241 by the contractile force of the elastic member 270 when the user releases the grip of the grip portion 230 .

The connecting member 243 is configured by an elongated plate-like member like the connecting member 242 . The connecting member 243 is fixed to the housing B in the vicinity of one end thereof as shown in FIG. In addition, the connection member 243 is formed with an elongated hole near the other end for moving the position of the connection point a6 with the grip portion 230 .

As shown in FIGS. 3 to 6, a user such as a doctor displaces the pusher 241 between a retracted state and an advanced state as the grasping portion 230 is grasped and released. can be made That is, the grasping portion 230 functions as a driving portion that drives the pusher 241 to move forward and backward. The connection members 242 and 243 function here as a link mechanism that applies the pressing force generated by the rotating member of the gripper 230 to the pusher 241 .

(Switching part)
The switching part 250 enables switching between a state in which the accommodating part 210 and the filling part 220 are in communication and a state in which they are not in communication according to an increase or decrease in the internal pressure of the filling part 220 . The switching portion 250 allows the accommodating portion 210 and the filling portion 220 to communicate with each other when the internal pressure of the filling portion 220 is reduced due to the pusher 241 retreating while the filling portion 220 does not contain liquid. Further, as shown in FIG. 4 , the switching portion 250 blocks communication between the accommodating portion 210 and the filling portion 220 when the space of the filling portion 220 is filled with the liquid and the internal pressure of the filling portion 220 increases. The switching unit 250 is configured by a spring-equipped check valve in the same manner as the on-off valve 221 in this embodiment. However, the specific structure of the switching unit 250 is not particularly limited.

The switching unit 250 is configured to open a valve to allow communication between the filling unit 220 and the storage unit 210 when the internal pressure of the filling unit 220 reaches a predetermined value or more (eg, 5 MPa or more). Since the switching part 250 is configured in this way, if an obstruction or the like occurs on the catheter device 100 side and the internal pressure in the filling part 220 rises excessively, the internal pressure of the filling part 220 can be adjusted appropriately. It is possible to depressurize. Therefore, damage to the catheter device 100 and damage to the medical instrument 200 can be suitably prevented.

(count part)
A counting unit 260 is provided to count whether the liquid fed by the pusher 241 reaches a predetermined amount. The counting unit 260 counts the number of stroke operations performed by the pusher 241 each time the rotating member of the grip unit 230 contacts the counting unit 260 . The number of times counted by the counting unit 260 may be displayed outside the housing B, for example. A user or the like can easily grasp the current liquid feeding amount by multiplying the liquid feeding amount per stroke of the pusher 241 by the number of strokes.

The medical system 1 may also include a lock mechanism that restricts insertion (connection) of the catheter device 100 to the external device 300 unless the count unit 260 confirms that the count has been performed a predetermined number of times. By providing such a lock mechanism, it is possible to prompt the user to perform appropriate priming using the medical device 200 . Note that the locking mechanism may be, for example, a structure that covers the connector portion 165 located at the proximal end portion of the catheter device 100, and the above-described locking mechanism may be applied only when priming is performed a predetermined number of times. A structure that allows the cover to be removed can be employed. Further, the mechanism for removing the cover can be configured to be electrically controlled or mechanically configured by mounting a microcomputer in the counting section, for example.

(elastic member)
The elastic member 270 has one end connected to the housing B and the other end connected to the pusher 241 . The elastic member 270 applies an urging force (contraction force in this embodiment) to the pusher 241 in a direction to retract the pusher 241 . As a result, the pusher 241 is held in the retracted position by the elastic member 270 (the position shown in FIGS. 4 and 6) when the gripping portion 230 is not gripped.

(Example of use)
Next, a usage example of the medical device 200 according to this embodiment will be described.

In the state where the medical device 200 is prepared, the grasping portion 230 is held at a position where the pusher 241 is advanced by, for example, a locking mechanism (not shown) (see FIG. 3). When starting priming, the pusher 241 may be held at the advanced position by the user gripping the grip portion 230 without intervening the lock mechanism or the like.

When the lock mechanism is released, the pusher 241 is retracted by the biasing force applied by the elastic member 270, as shown in FIG. When the pusher 241 is retracted while the filling part 220 is not filled with the liquid, the pressure of the filling part 220 becomes lower than that of the storage part 210, and the switching part 250 brings the storage part 210 and the filling part 220 into communication. . Thereby, as shown in FIG. 4, the liquid stored in the storage section 210 moves to the filling section 220, and the filling section 220 is filled with the liquid.

In this state, when the user grips the gripping portion 230 and applies a pressing force to the gripping portion 230, the rotating member of the gripping portion 230 rotates, and the rotational movement of the gripping portion 230 through the connecting members 242 and 243 causes the pressing force. 241 translational motions. As a result, the pusher 241 receives the pressing force from the grip portion 230 and advances against the biasing force of the elastic member 270 . As a result, the open/close valve 221 is opened as shown in FIG.

When the pressing force applied to the grasping portion 230 is released, the pusher 241 is retracted by the elastic force of the elastic member 270, and the on-off valve 221 is closed. The pusher 241 pushes the liquid from the on-off valve 221 toward the tube T2, thereby reducing the liquid contained in the filling section 220. As shown in FIG. As the pusher 241 retreats in this state, the internal pressure of the filling section 220 decreases again, and the switching section 250 allows the accommodating section 210 and the filling section 220 to communicate with each other. Then, as shown in FIG. 6, the filling portion 220 is filled with the liquid contained in the containing portion 210 .

In this manner, the user repeats the operation of gripping and releasing the gripping portion 230, thereby causing the pusher 241 to push out the liquid in the filling portion 220 and move the liquid from the containing portion 210 to the filling portion 220. The action to do is repeated.

A user can use the medical device 200 to pump liquid from the filling portion 220 to the lumen 110a of the sheath 110 in which the drive shaft 140 is housed. By pumping the liquid from the medical device 200, the coil provided in the tubular body 140a of the drive shaft 140 is deformed such that the pitch of the turns increases, as shown in FIG. Each time the user repeatedly grips and releases the grip portion 230, pressure is applied to axially stretch the coil provided in the tubular body 140a. Further, by gripping and releasing the gripping portion 230 at a constant rhythm, the liquid can be pressure-fed at a variable speed, so that the coil can be easily expanded and contracted. Therefore, by using the medical device 200, it becomes possible to preferably remove the air (bubbles) Ba remaining between the coils. Moreover, it is possible to suitably remove the air (bubbles) Ba remaining in a member having many uneven shapes such as the vibrator unit 145 .

As described above, the medical device 200 according to the present embodiment includes the storage section 210 that can store the liquid to be sent to the catheter device 100, and the storage section 210 that communicates with the storage section 210 and can receive the liquid from the storage section 210. A filling part 220, a gripping part 230 that can be gripped by a user's fingers, and the internal pressure of the filling part 220 is increased or decreased according to the operation of increasing or weakening the gripping force of gripping the gripping part 230 by the user. an operation unit 240; a switching unit 250 capable of switching between a state in which the housing unit 210 and the filling unit 220 are in communication and a state in which the housing unit 210 and the filling unit 220 are not in communication according to an increase or decrease in the internal pressure of the filling unit 220; is configured to have

The medical device 200 can pump a predetermined amount of liquid (priming liquid) to the sheath 110 each time the user performs an action of gripping the grip portion 230 and an action of releasing the grip of the grip portion 230 . Therefore, it is possible to more reliably remove air bubbles remaining in the sheath 110 .

Further, the operation section 240 includes a pusher 241 capable of pushing out the liquid filled in the filling section 220 toward the catheter device 100 . The switching portion 250 allows the liquid contained in the containing portion 210 to move to the filling portion 220 when the pusher 241 moves to reduce the internal pressure of the filling portion 220 . As a result, when the liquid filled in the filling section 220 is reduced, the liquid can be filled into the filling section 220 from the storage section 210, and the liquid can be quickly fed a plurality of times.

The filling section 220 also includes an on-off valve 221 that allows the liquid filled in the filling section 220 to be sent toward the catheter device 100 . The on-off valve 221 is configured to open when the internal pressure of the filling section 220 is increased by the pusher 241 . As a result, the on-off valve 221 is opened when the pusher 241 is moved, and the liquid filled in the filling section 220 can be delivered to the catheter device 100 with good timing.

Moreover, the grip part 230 is configured to be rotatable on the basis of the fulcrum a3, and is provided with a rotating member capable of applying a pressing force of the user's fingers. The operating portion 240 includes connection members 242 and 243 having an action point a5 for applying a pressing force generated by the rotating member of the grip portion 230 to the pusher 241 . The distance from the force point a4 where the user applies a pressing force to the fulcrum a3 on the rotating member of the grip part 230 is longer than the distance from the action point a5 to the fulcrum a3. Therefore, even if the pressing force applied to the grip portion 230 is relatively weak, the force acting on the pusher 241 can be increased by the above positional relationship, and the liquid feeding operation can be performed efficiently.

The medical device 200 is also configured to include an elastic member 270 that biases the pusher 241 so that the internal pressure of the filling portion 220 is reduced. Therefore, when the pressing force is not applied by the grip part 230, the pusher 241 can be retracted, and the next liquid feeding operation can be performed in a state where the pressing force is not applied.

The medical device 200 is also configured to include a counting section 260 that counts the number of times the pusher 241 pushes out the liquid filled in the filling section 220 by the grip section 230 . By configuring in this way, it is possible to more objectively grasp whether the operation for removing air bubbles is being performed without depending on the user's intuition.

Moreover, the switching unit 250 includes an on-off valve. The on-off valve of the switching section 250 allows liquid to flow from the storage section 210 to the filling section 220 when the internal pressure of the filling section 220 is lower than that of the storage section 210 . Further, the switching section 250 is configured to discharge the liquid from the filling section 220 to the storage section 210 when the internal pressure of the filling section 220 exceeds a predetermined value. With this configuration, the liquid is normally delivered to the filling section 220, and when the internal pressure reaches a predetermined value, the liquid is discharged to the storage section 210, thereby delivering the liquid to the catheter device 100. It is possible to suppress a sudden increase in pressure due to

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the claims. 8 to 10 are cross-sectional views showing medical instruments according to modifications of the present invention.

An embodiment has been described above in which the gripping portion 230 is a rotating member that can rotate about the fulcrum a3, and the rotating motion of the rotating member of the gripping portion 230 is converted into the translational motion of the pusher 241 by the connecting members 242 and 243. However, as long as the pressing force applied to the gripping portion 230 can be transmitted to the pusher 241, the configuration of the gripping portion is not limited to the above.

In addition to the above, the grasping portion 230a may be configured by a movable member capable of translational movement similar to the pusher 241, as shown in FIGS. Alternatively, the connection member 242a may be configured by a plate-like member bent around the fulcrum a3 as shown in FIG. The connection member 242a is rotatably attached to the housing B1 at the fulcrum a3. Further, the connection member 242a has an elongated hole at a power point a4 that is connected to the grip portion 230a. Also, the connection member 242a has an action point a5 connected to the pusher 241 formed in an elongated hole in the same manner as described above. 8 and the like, the elastic member 270a urges the grasping portion 230a so that the internal pressure of the filling portion 220 is reduced and the pusher 241 is retracted via the connecting member 242a.

With this configuration, the pusher 241 can be retracted by the elastic force of the elastic member 270a when no pressing force is applied to the grip portion 230a. On the other hand, in a state where the pressing force is applied to the grip portion 230a, the pusher 241 is advanced against the urging force of the elastic member 270a, thereby directing the liquid filled in the filling portion 220 toward the catheter device 100. Liquid can be delivered.

In addition to the above, the unit connector 150 may not be connected until the counting unit 260 confirms that the liquid has been transferred a predetermined number of times. Further, although it has been described that the storage portion 210 is connected to the storage tank R through the tube T1, the storage portion 210 may be prefilled with liquid.

In addition, in the description of the embodiments, the medical device configured to increase and decrease the internal pressure of the filling section in conjunction with the user's operation of gripping the gripping section and the operation of releasing the gripping of the gripping section was exemplified. The medical device can also be configured to electrically (automatically) increase or decrease the internal pressure of the filling section without requiring the above operation by the user.

Note that the catheter device to which the medical instrument 200 is used is not particularly limited as long as it requires priming. For example, it may be a dual diagnostic catheter capable of acquiring IVUS and OCT images, or other catheter device.

This application is based on Japanese Patent Application No. 2018-065327 filed on March 29, 2018, the disclosure of which is incorporated herein by reference.

1 medical system,
100 catheter device,
200 medical instruments,
210 containment unit,
220 filling section,
221 on-off valve,
230 gripping portion (rotating member),
240 operation unit,
242, 243 connecting member (link mechanism),
241 Pusher,
250 switching unit,
260 count unit,
270 elastic member;
a3 fulcrum,
a4 emphasis,
a5 Point of action a6 Connection point.

Claims (10)

a storage section capable of storing a liquid to be fed to the catheter device;
a filling portion communicating with the storage portion and capable of receiving the liquid from the storage portion;
a gripping portion that can be gripped by a user's fingers;
an operation unit that increases or decreases the internal pressure of the filling unit according to the user's operation of applying a gripping force to grip the gripping unit;
a switching unit that can switch between a state in which the storage unit and the filling unit are in communication and a state in which the storage unit and the filling unit are not in communication according to an increase or decrease in the internal pressure of the filling unit ;
The catheter device is provided with a lumen capable of moving back and forth through a drive shaft having a transducer unit for transmitting and receiving signals at the tip, and a communication hole at the tip that communicates the lumen with the outside. A medical device comprising a sheath having an outer surface including a sheath exposed to the exterior . The operation unit includes a pusher that can push the liquid filled in the filling unit toward the catheter device,
2. The medical instrument according to claim 1, wherein the switching portion moves the liquid contained in the containing portion to the filling portion when the pusher moves to reduce the internal pressure of the filling portion. The filling unit includes an on-off valve that allows the liquid filled in the filling unit to be sent toward the catheter device,
The medical instrument according to claim 2, wherein the on-off valve is opened when the internal pressure of the filling section is increased by the pusher. The gripping portion is configured to be rotatable with respect to a fulcrum, and includes a rotating member capable of applying a pressing force of the user's fingers,
The operation unit includes a link mechanism having an action point for applying the pressing force generated by the rotating member to the pusher,
4. The medical instrument according to claim 2, wherein a distance from a point of force at which the user applies the pressing force to the fulcrum is longer than a distance from the point of action to the fulcrum. The medical instrument according to any one of claims 2 to 4, further comprising an elastic member that biases the pusher or the grip so that the internal pressure of the filling portion is reduced. a storage section capable of storing a liquid to be fed to the catheter device;
a filling portion communicating with the storage portion and capable of receiving the liquid from the storage portion;
a gripping portion that can be gripped by a user's fingers;
an operation unit that increases or decreases the internal pressure of the filling unit according to the user's operation of applying a gripping force to grip the gripping unit;
a switching unit that can switch between a state in which the storage unit and the filling unit are in communication and a state in which the storage unit and the filling unit are not in communication according to an increase or decrease in the internal pressure of the filling unit;
The operation unit includes a pusher that can push the liquid filled in the filling unit toward the catheter device,
the switching unit moves the liquid stored in the storage unit to the filling unit when the pusher moves to reduce the internal pressure of the filling unit;
The medical instrument further comprising a counting section that counts the number of times the pusher pushes out the liquid filled in the filling section by the grasping section. The switching section allows the liquid to flow from the storage section to the filling section when the internal pressure of the filling section becomes lower than that of the storage section, and the internal pressure of the filling section reaches a predetermined value. The medical device according to any one of claims 1 to 6, comprising an on-off valve that discharges the liquid from the filling section to the storage section when the liquid exceeds. a storage section capable of storing a liquid to be fed to the catheter device;
a filling portion communicating with the storage portion and capable of receiving the liquid from the storage portion;
a pusher movably disposed within the filling section;
a switching unit capable of switching between a state in which the accommodating portion and the filling portion are in communication and a state in which the accommodating portion and the filling portion are not in communication according to the movement of the pusher;
The catheter device is provided with a lumen capable of moving back and forth through a drive shaft having a transducer unit for transmitting and receiving signals at the tip, and a communication hole at the tip that communicates the lumen with the outside. A medical device comprising a sheath having an outer surface including a sheath exposed to the exterior . The filling unit includes an on-off valve that allows the liquid filled in the filling unit to be sent toward the catheter device,
9. The medical instrument according to claim 8, wherein the on-off valve is opened when the internal pressure of the filling section is increased by the pusher. The switching section allows the liquid to flow from the storage section to the filling section when the internal pressure of the filling section becomes lower than that of the storage section, and the internal pressure of the filling section exceeds a predetermined value. 10. The medical device according to claim 8, further comprising an on-off valve that discharges the liquid from the filling section to the storage section when the liquid is discharged.

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