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WO2007145751A2 - fil de guidage formÉ d'une construction composite et procÉdÉ de fabrication associÉ - Google Patents

fil de guidage formÉ d'une construction composite et procÉdÉ de fabrication associÉ Download PDF

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Publication number
WO2007145751A2
WO2007145751A2 PCT/US2007/011308 US2007011308W WO2007145751A2 WO 2007145751 A2 WO2007145751 A2 WO 2007145751A2 US 2007011308 W US2007011308 W US 2007011308W WO 2007145751 A2 WO2007145751 A2 WO 2007145751A2
Authority
WO
WIPO (PCT)
Prior art keywords
wire segment
flat planar
proximal
composite
distal
Prior art date
Application number
PCT/US2007/011308
Other languages
English (en)
Other versions
WO2007145751A3 (fr
Inventor
Eric D. Mathews
Andrew M. Whitehead
John R. Panicci
Original Assignee
Concert Medical Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Concert Medical Llc filed Critical Concert Medical Llc
Publication of WO2007145751A2 publication Critical patent/WO2007145751A2/fr
Publication of WO2007145751A3 publication Critical patent/WO2007145751A3/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M25/0905—Guide wires extendable, e.g. mechanisms for extension
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09058—Basic structures of guide wires
    • A61M2025/09075—Basic structures of guide wires having a core without a coil possibly combined with a sheath
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09108—Methods for making a guide wire

Definitions

  • This invention relates to medical apparatus and methods in general, and more particularly to medical guidewires and methods for making the same.
  • vascular guidewires are widely used in medical procedures.
  • vascular guidewires for example, are commonly used to guide catheters through tortuous vasculature to distal sites.
  • a guidewire used for delivering coronary stents might enter the patient's body down at the femoral artery, traverse the intervening vasculature, and terminate in a coronary artery.
  • An orthopedic arthroscopic guidewire is commonly used to guide tools and/or implants through a keyhole incision and down to an internal surgical site, where the tools and/or implants are to be utilized.
  • the present invention is directed to vascular guidewires and the like,
  • vascular guidewires Due to their application, vascular guidewires generally require different properties for different portions of the guidewire.
  • the distal end of the guidewire generally requires higher elasticity and lower stiffness, in order to provide sufficient flexibility to navigate through highly tortuous anatomy.
  • the distal end of the guidewire still requires some stiffness, in order to maintain the torque
  • the proximal end of the guidewire generally requires lower elasticity and higher stiffness, in order to provide sufficient column strength to ensure adequate pushability of the guidewire through substantial vascular lengths and in order to provide adequate torque transmission along the guidewire.
  • the proximal end of the guidewire still requires some flexibility, in order to permit the guidewire to navigate through highly tortuous anatomy.
  • composite guidewires are generally formed by joining two wire lengths, each wire length being made from a different material having different intrinsic properties.
  • these composite guidewires utilize (i) stainless steel wire to form the proximal end of the guidewire, and (ii) nickel titanium (i.e., Nitinol) wire to form the distal end of the guidewire.
  • nickel titanium e.g., higher elasticity and lower stiffness
  • superior pushability and torquability are provided in the proximal segment of the composite guidewire, and flexibility, durability and support are provided in the distal segment of the composite guidewire.
  • tensile strength is important since, if the guidewire becomes stuck during use, it may be necessary pull the guidewire free.
  • a cylindrical coupler has generally be used to join together two wire segments each having circular cross-sections.
  • U.S. Patent No. 5,341,818 discloses a connector made of Nitinol tubing which compresses inwardly onto the two wire segments so as to secure the joint.
  • U.S. Patent No. 5,980,471 discloses a tubular connector which provides a mechanical interlock between the two wire segments, wherein the two wire segments are irregularly shaped and the space inside the tube is rilled with solder or adhesive.
  • U.S. Patent No. 6,544,197 also discloses a Nitinol tubing coupler, but additionally includes a safety wire in the joint to secure the two wire
  • U.S. Patent No. 6,918,882 discloses a connector formed out of a nickel-chromium-molybdenum alloy, or a nickel-chromium-iron alloy, that is suitable for welding together the two wire segments.
  • wire-based surgical devices include other types of guidewires; snares; retrievers and graspers; embolic protection devices (e.g., filters); detachable devices that position embolic materials and implantable filters; biopsy devices; devices that deliver energy such as ultrasound, electric current, and radiofrequency; etc.
  • embolic protection devices e.g., filters
  • detachable devices that position embolic materials and implantable filters
  • biopsy devices devices that deliver energy such as ultrasound, electric current, and radiofrequency; etc.
  • wire-based devices may require different performance characteristics along various segments of their length.
  • a biopsy device might utilize a wire which requires the properties of titanium along one segment of the wire and the
  • wire-based surgical devices frequently comprise multiple segments providing
  • the wire joining concepts of the present invention may be used to join different materials having desirable properties in a composite wire in order to achieve the performance characteristics desired for such other wire-based surgical devices.
  • the present invention provides a means for joining together two different wire segments at a joint that provides improved (i) tensile strength, (ii) torque strength, (iii) bending moment performance, and (iv) failure mode characteristics, among other things, and which is suitable for medical applications. More particularly, using advanced grinding technology or other suitable manufacturing techniques, complementary flat planar bonding faces, suitable for overlapping bonding, are created at the ends of the two wire segments which are to be joined. The complementary flat planar bonding faces are of sufficient surface area as to provide the required tensile strength and torque strength for the guidewire. In one preferred form of the invention, each of the complementary flat planar bonding faces
  • planar bonding faces comprises a single surface.
  • each of the complementary flat planar bonding faces comprises a plurality of surfaces.
  • the wire segments may be configured so as to provide a monotonic transition of the bending moment along the length of the composite guidewire.
  • joint of the composite guidewire may be configured so as
  • a composite guidewire comprising: a proximal wire segment having a proximal end, a distal end and a longitudinal axis extending between the proximal end and the distal end, the distal end of the proximal wire segment being formed with a first fiat planar bonding face which extends parallel to the longitudinal axis, the proximal wire segment having a first elasticity; a distal wire segment having a proximal end, a distal end and a longitudinal axis extending between the proximal end and the distal end, the proximal end of the distal wire segment being formed with a second flat planar bonding face which extends parallel to the longitudinal axis, the distal wire segment having a second elasticity;
  • proximal wire segment is joined to the distal wire segment by bonding the first flat planar bonding face of the proximal wire segment to the complementary second flat planar bonding face of the distal wire
  • composite guidewire comprising the steps of: providing a proximal wire segment having a proximal end, a distal end
  • the distal end of the proximal wire segment being formed with a first fiat planar bonding face which extends parallel to the longitudinal axis, the proximal wire segment having a first elasticity; providing a distal wire segment having a proximal end, a distal end and a longitudinal axis extending between the proximal end and the distal end, the proximal end of the distal wire segment being formed with a second flat planar bonding face which extends parallel to the longitudinal axis, the distal wire segment having a second elasticity; wherein the second flat planar bonding face of the proximal wire segment is formed complementary to the first flat planar bonding face of the distal
  • a composite wire comprising a first wire segment and a second wire segment, the first wire segment being joined to the second wire segment at bonded complementary flat planar
  • a method for forming a composite wire comprising the steps of: providing a first wire segment and a second wire segment; providing a first flat planar bonding face on the first wire segment, and providing a complementary second flat planar bonding face on the second wire segment; and bonding the first flat planar bonding face of the first wire segment to the complementary second flat planar bonding face of the second wire segment in an overlapping manner.
  • Fig. 1 is a partial side view showing a composite guidewire formed in
  • the composite guidewire utilizes one preferred form of joint construction
  • Fig. 2 shows the composite guidewire of Fig. 1, but with the two wire
  • FIG. 3 is a view like that of Fig. 1 , but showing another joint construction
  • Fig. 4 is a sectional view taken along line 4-4 of Fig. 3;
  • Fig. 5 is a sectional view taken along line 5-5 of Fig. 3;
  • Fig. 6 is a view like that of Fig. 3, but showing another joint construction
  • Fig. 7 is a sectional view taken along line 7-7 of Fig. 6;
  • Fig. 8 is a sectional view taken along line 8-8 of Fig.6;
  • Fig.9 is a view like that of Fig. 6, but showing another joint construction;
  • Fig. 10 is a sectional view taken along line 10-10 of Fig. 9;
  • Fig. 11 is a sectional view taken along line 11-11 of Fig. 9;
  • Fig. 12 is a view like that of Fig.9, but showing another joint construction
  • Fig. 13 is a sectional view taken along line 13-13 of Fig. 12;
  • Fig. 14 is a sectional view taken along line 14-14 of Fig. 12;
  • Fig. 15 is a view like that of Fig. 12, but showing another joint construction, and showing the potential bending stiffness along the relevant portion of that guidewire
  • Fig. 16 is a view like that of Fig. 15, but showing another joint construction, and showing the potential bending stiffness along the relevant portion of that guidewire;
  • Fig. 17 is a side view of a composite guidewire formed in accordance with the present invention, wherein the guidewire utilizes a joint comprising an adhesive material applied to the complementary flat planar bonding faces of the wire segments;
  • Fig. 18 is a side view like that of Fig. 17, but omitting the adhesive material and instead showing a joint surrounded by a polymer shrink sleeve;
  • Fig. 19 is a side view like that of Figs. 17 and 18, wherein the joint comprises both an adhesive material applied to the complementary flat planar bonding faces of the wire segments and a polymer shrink sleeve surrounding the joint;
  • Fig. 20 is a side view like that of Fig. 17, but showing a joint utilizing a pair of polymer shrink sleeves;
  • Fig. 21 is a side view like that of Fig. 17, but showing a joint utilizing a metal coil;
  • Fig. 22 is a side view like that of Fig. 21 but showing a joint utilizing a
  • Fig. 23 is a schematic view showing another possible joint construction for the composite guidewire of the present invention
  • Fig. 24 is a schematic view showing another possible joint construction for the composite guidewire of the present invention
  • Fig. 25 is a schematic view showing another possible joint construction for
  • Fig. 26 is a sectional view taken through the assembled composite guidewire of Fig. 25;
  • Fig. 27 is a schematic view showing another possible joint construction for the composite guidewire of the present invention.
  • Fig. 28 is a sectional view taken through the assembled composite guidewire of Fig. 27;
  • Fig. 29 is a schematic view showing another possible joint construction for the composite guidewire of the present invention.
  • Fig. 30 is a schematic view showing another possible joint construction for the composite guidewire of the present invention.
  • Novel composite guidewire 5 formed in accordance with the present invention.
  • Novel composite guidewire 5 generally comprises a first wire segment 10 and a second wire segment 15.
  • First wire segment 10 and second wire segment 15 are attached to one another at a joint 20.
  • First wire segment 10 and second wire segment 15 are preferably formed
  • composite guidewire 5 In one preferred form of the present invention, composite guidewire 5
  • proximal wire segment 10 generally requires lower elasticity and higher stiffness, in order to provide sufficient column strength to ensure adequate pushability of the guidewire through substantial vascular lengths and in order to provide adequate torque transmission along the guidewire.
  • proximal wire segment 10 of the composite guidewire still requires some flexibility, in order to permit the guidewire to navigate through highly tortuous anatomy.
  • proximal wire segment 10 comprises stainless steel.
  • distal wire segment 15 generally requires higher elasticity and lower stiffness, in order to provide sufficient flexibility to navigate
  • distal wire segment 15 of the composite guidewire still requires some stiffness, in order to maintain the torque transmission requirements of the guidewire and to provide sufficient support for stent delivery.
  • distal wire segment 15 comprises Nitinol, or another "super-elastic” or “pseudo-elastic” or
  • Joint 20 is formed so as to preserve the integrity of the guidewire.
  • joint 20 provides adequate (i) tensile strength, (ii) torque strength, (iii) bending moment performance, and (iv) failure mode characteristics, among other things.
  • joint 20 is formed by complementary flat planar bonding faces, suitable for overlapping bonding, which are created at the joint ends of the two wire segments which are to be joined.
  • the complementary flat planar bonding faces are of sufficient surface area to provide, once they are bonded in overlapping fashion, the required tensile strength and torque strength for the guidewire.
  • each of the complementary flat planar bonding faces comprises a single surface.
  • each of the complementary flat planar bonding faces comprises a plurality of surfaces.
  • the wire segments may be configured so as to provide a monotonic transition of the bending moment along the length of the composite guidewire.
  • the joint of the composite guidewire may be configured so as to provide the desired failure mode characteristics.
  • joint 20 is formed by (i) a flat planar bonding face 25 formed at the distal end of proximal wire segment 10, and (ii) a complementary flat planar bonding face 30 formed at the proximal end of distal wire segment 15.
  • Flat planar bonding face 25 is positioned against flat planar bonding face 30, with surface 35 of proximal wire segment 10 engaging surface 40 of distal wire segment 15, and with surface 45 of proximal wire segment 10 engaging surface 50 of distal wire segment 15, and then the two wire segments are bonded together in overlapping fashion at the joint line so as to form composite guidewire 5.
  • proximal wire segment 10 comprises a tongue 55 which includes the flat planar bonding face 25
  • distal wire segment 15 comprises a tongue 60 which includes the complementary flat planar bonding face 30.
  • the complementary flat planar bonding faces 25, 30 each comprise a single surface.
  • the strength of joint 20 is provided by the bonded overlapping flat planar bonding faces 25, 30. More particularly, bonded overlapping flat planar bonding faces 25, 30:
  • the bonded overlapping flat planar bonding faces 25, 30 do not allow for torque loss to occur (of course, when very high torsional loads are applied to the joint, torque loss may be experienced across the bond as plastic deformation is imparted onto the bonded overlapping flat planar bonding faces 25, 30 , i.e., as the bonded overlapping flat planar bonding faces are twisted).
  • both tensile strength and torsional strength are a function of the length of the bond established between the
  • a joint 20 can be formed which has excellent tensile strength and torque strength, while still providing excellent bending moment performance, and
  • the flat planear bonding face 25 formed in proximal wire segment 10, and/or the flat planar bonding face 30 formed in distal wire segment 15, are preferably formed by grinding or machining. It should be appreciated that when complementary flat planar bonding faces 25, 30 are formed by grinding or machining, it is important that (i) enough of the original wire segment be removed so as to create a flat planar bonding face which is large enough to provide adequate contact and holding power, but (ii) enough of the original wire segment be retained so as to maintain the integrity of the wire segment.
  • Flat planar bonding faces 25, 30 may be formed on the half-round (i.e., flat planar bonding faces 25, 30 may be positioned on the diameter, in the manner shown in Figs. 1 and 2), but they are not necessarily so formed.
  • flat planar bonding faces 25, 30 may be formed on the half-round (i.e., flat planar bonding faces 25, 30 may be positioned on the diameter, in the manner shown in Figs. 1 and 2), but they are not necessarily so formed.
  • flat planar bonding faces 25, 30 may be formed, complementarily, offset from the line crossing the center of the wire segment, i.e., offset from the diameter line.
  • flat planar bonding faces 25, 30 may be positioned on the diameter, in the manner shown in Figs. 1 and 2, so that each tongue 55, 60 has a half-circle cross-section; or flat planar bonding faces 25, 30 may be positioned off
  • each tongue 55, 60 has more
  • Figs. 1 and 2 can be equal in cross-section, in the manner shown in Figs. 1 and 2; or the two tongues 55, 60 may complementarity vary in cross-section, in the manner shown
  • flat planar bonding faces 25, 30 are formed in proximal wire segment 10 and distal wire segment 15, respectively, so that the break-loads of each wire segment 10, 15 (i.e., the break-loads of each tongue 55, 60) are equal.
  • the relative positions of flat planar bonding faces 25, 30 are set (in a radial sense) by taking into account the ultimate tensile strengths (UTS) of the materials forming each of the wire segments 10, 15, so that each
  • wire segment i.e., each tongue 55, 60
  • wire segment has an equal break load
  • A* UTS(proximal wire segment 10) A*UTS(distal wire segment 15)
  • A the cross-sectional area of the wire segment. See, for example, Figs.
  • flat planar bonding face 25 is set to provide a thinner tongue 55 and flat planar bonding face 30 is set to provide a thicker tongue 60.
  • Providing tongues of different relative thicknesses allows wire segments of different material strengths to break at the same time.
  • composite guidewire 5 comprises a proximal wire segment 10 made of stainless steel and a distal wire segment 15 made of
  • tongue 55 of proximal wire segment 10 might have a smaller cross- section than tongue 60 of distal wire segment 15.
  • the complementary flat planar bonding faces 25, 30 each comprise a single surface. However, it is also possible for each of the complementary flat planar bonding faces 25, 30 to comprise a plurality of surfaces.
  • flat planar bonding face 25 and complementary flat planar bonding face 30 may each comprise a plurality of surfaces, which may or may not lie co-planar with one another.
  • flat planar bonding face 25 comprises flat planar surfaces 25A, 25B and 25C
  • complementary flat planar bonding face 30 comprises flat planar surfaces 30A, 30B and 30C
  • flat planar bonding face 25 comprises flat planar surfaces 25 A and 25B, and complementary
  • flat planar bonding face 30 comprises flat planar surfaces 30A and 3OB.
  • tongues 55 and 60 can be given an interlocking character which can
  • surfaces 35, 40, 45 and 50 may or may not extend perpendicular to the longitudinal axis of composite guidewire 5.
  • surfaces 35, 40, 45 and 50 may or may not extend perpendicular to the longitudinal axis of composite guidewire 5.
  • surfaces 35, 40, 45 and 50 all extend perpendicular to the longitudinal axis of composite guidewire 5
  • surfaces 35 A, 4OA, 45A and 50A all extend at an acute angle to the longitudinal axis of
  • flat planar bonding face 25 comprises a plurality of flat planar surfaces
  • flat planar bonding face 30
  • surfaces 35, 40, 45 and 50 may extend at an acute angle to the longitudinal axis of the composite guidewire.
  • the proximal wire segment 10 and the distal wire segment 15 may be reduced in diameter before joint 20, i.e., before flat planar bonding faces 25 and 30 begin.
  • This construction may be used to reduce the bending moment experienced at the joint by distributing the bend across a longer length, thereby distributing the focus of the bending moment across a larger zone and beyond that of the bonded overlapping complementary flat planar bonding faces 25, 30. See, for example, Figs. 15 and 16, where the outer surfaces of the proximal wire segment 10 and distal wire segment 15 are tapered as shown at 65.
  • the two complementary flat planar bonding faces 25, 30 are aligned with one another in an overlapping fashion, and then the complementary flat planar bonding faces are bonded together. Such bonding may
  • tongues 55, 60 of joint 20 may be bonded together by using:
  • intermediate means including:
  • adhesives e.g., epoxies, urethane acrylics, cyano- acrylates, etc.
  • metallurgical bonding materials e.g., braze, including AuGe; solder, including AuSn and SnAg, etc., with or without various fluxes, etching solutions, or plating methods to facilitate the metallurgical bond;
  • welds including filler materials as necessary to diminish imbrittlement); etc; see, for example, Fig. 17, where epoxy, adhesive, solder, weld 70 is used to bond, in an overlapping fashion, complementary flat planar surfaces 25A, 25B to 3OA, 30B, respectively; and (ii) mechanical means, including: (a) crimping;
  • shrink sleeves see, for example, Fig. 18, where a polymer or metal shrink sleeve 75 is used to bond, in an overlapping fashion, complementary flat planar surfaces 25A, 25B to 30A, 30B, respectively; Fig. 19,
  • epoxy adhesive 70 and polymer or metal shrink sleeve 15 are both used to bond, in an overlapping fashion, complementary flat planar surfaces 25A, 25B to
  • Fig. 22 where epoxy adhesive 70 and a polymer or metal braided member 85 are both used to bond, in an overlapping fashion, complementary flat planar surfaces 25A, 25B to 3OA, 3OB, respectively;
  • the polymers may comprise any suitable biocompatible polymer including, but not limited to, PET, PTFE, FEP, polyimide, polyurethane, polyethylene, poly propylene, Pebax, etc.; and where the metals may comprise any suitable biocompatible metal including, but not limited to, stainless steel, Nitinol, etc;
  • coils and/or braids etc.; where the coils and/or braids may be made from polymers or metals, and where the polymers may comprise any suitable biocompatible polymer including, but not limited to, PET, PTFE 3 FEP, polyimide, polyurethane, polyethylene, poly propylene, Pebax, etc.; and where the metals may comprise any suitable biocompatible metal including, but not limited to, stainless steel, Nitinol, etc;
  • such sleeves, coils and/or braided members can further act as protective coverings to
  • these protective coverings also may serve to hold in place the ends
  • these protective coverings can also serve as a tether to hold the two wire segments together in the event that bond breakage occurs.
  • Fig. 23 shows one exemplary joint configuration in which tongue 55 comprises a set of flat planar surfaces 25 A, 25B, 25C and tongue 60 comprises a complementary set of flat planar surfaces 3OA, 3OB, 30C;
  • Fig. 24 shows another exemplary joint configuration in which tongue 55 comprises a set of flat planar surfaces 25 A, 25B and tongue 60
  • Figs. 25 and 26 show another exemplary joint configuration in which tongue 55 comprises a set of flat planar surfaces 25A, 25B and tongue 60 comprises a complementary set of flat planar surfaces 30A, 30B; and Figs. 27 and 28 show another exemplary joint configuration in which tongue 55 comprises a set of flat planar surfaces 25 A, 25B, 25C and tongue 60 comprises a complementary set of flat planar surfaces
  • proximal wire segment 10 It is also possible to utilize hollow bodies for proximal wire segment 10
  • composite guidewire 5 utilizes a hollow body (i.e., a tube), it may be beneficial to blend the stiffnesses of the two adjoining segment materials.
  • the proximal end of the hollow body may be annealed so as to provide an increased austenitic finish temperature.
  • composite guidewire 5 may comprise more than two wire segments, in which case the composite guidewire will include more than one joint 20.
  • composite guidewire 5 may comprise three wire segments and two joints; or composite guidewire 5 may
  • Composite guidewire 5 of the present invention is preferably formed so as to have a diameter of between about 0.010 inches and about 0.038 inches. However, it should be appreciated that composite guidewire 5 may also be formed so as to have other diameters as well.
  • the present invention could be embodied in devices other than coronary guidewires.
  • the present invention could be embodied in other types of guidewires, or the present invention could be embodied in other wire-based devices including, but not limited to, snares; retrievers and graspers; embolic protection devices (e.g., filters); detachable devices that position embolic materials and implantable filters; biopsy devices; devices that deliver energy such as ultrasound, electric current, and radiofrequency; etc.
  • the composite wire may
  • the most flexible wire segment may be

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
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  • General Health & Medical Sciences (AREA)
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Abstract

L'invention concerne un fil de guidage composite comprenant : un segment métallique proximal présentant une extrémité proximale, une extrémité distale et un axe longitudinal s'étendant entre l'extrémité proximale et l'extrémité distale, l'extrémité distale du segment métallique proximal étant formée avec une première face de métallisation plane plate qui s'étend parallèlement à l'axe longitudinal, le segment métallique proximal présentant une première élasticité; un segment métallique distal présentant une extrémité proximale, une extrémité distale et un axe longitudinal s'étendant entre l'extrémité proximale et l'extrémité distale, l'extrémité proximale du segment métallique distal étant formée avec une seconde face de métallisation plane plate qui s'étend parallèlement à l'axe longitudinal, le segment métallique distal présentant une seconde élasticité; caractérisé en ce que la seconde face de métallisation plane plate du segment métallique proximal est formée de manière complémentaire à la première face de métallisation plane plate du segment métallique distal; et caractérisé de plus en ce que le segment métallique proximal est soudé au segment métallique distal par métallisation de la première face de métallisation plane plate du segment métallique proximal à la seconde face de métallisation plane plate complémentaire du segment métallique distal de manière chevauchante. L'invention concerne un procédé de formation de fil de guidage composite, le procédé comprenant les étapes consistant à : obtenir un segment métallique proximal présentant une extrémité proximale, une extrémité distale et un axe longitudinal s'étendant entre l'extrémité proximale et l'extrémité distale, l'extrémité distale du segment métallique proximal étant formée avec une face de métallisation plane plate qui s'étend parallèlement à l'axe longitudinal, le segment métallique proximal présentant une première élasticité; obtenir un segment métallique distal présentant une extrémité proximale, une extrémité distale et un axe longitudinal s'étendant entre l'extrémité proximale et l'extrémité distale, l'extrémité proximale du segment métallique distal étant formée avec une seconde face de métallisation plane plate qui s'étend parallèlement à l'axe longitudinal, le segment métallique distal présentant une seconde élasticité; la seconde face de métallisation plane plate du segment métallique proximal étant formée de manière complémentaire à la première face de métallisation plane plate du segment métallique distal; et relier par métallisation la première face de métallisation plane plate du segment métallique proximal à la seconde face de métallisation plane plate complémentaire du segment métallique distal de manière chevauchante. L'invention concerne également un fil composite contenant un premier segment métallique et un second segment métallique, le premier segment métallique étant joint au second segment métallique au niveau de faces de métallisation planes plates complémentaires. L'invention concerne également un procédé de formation de fil composite, le procédé comprenant les étapes consistant à : obtenir un premier segment métallique et un second segment métallique, obtenir une première face de métallisation plane plate sur le premier segment métallique, et obtenir une seconde face de métallisation plane plate complémentaire sur le second segment métallique; et relier par métallisation la première face de métallisation plane plate du premier segment métallique à la seconde face de métallisation plane plate complémentaire du second segment métallique de manière chevauchante.
PCT/US2007/011308 2006-05-12 2007-05-10 fil de guidage formÉ d'une construction composite et procÉdÉ de fabrication associÉ WO2007145751A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US79998506P 2006-05-12 2006-05-12
US60/799,985 2006-05-12

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WO2007145751A2 true WO2007145751A2 (fr) 2007-12-21
WO2007145751A3 WO2007145751A3 (fr) 2008-10-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012112967A1 (fr) 2011-02-18 2012-08-23 Guided Delivery Systems Inc. Systèmes et procédés pour attaches à rigidité variable
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WO2012112967A1 (fr) 2011-02-18 2012-08-23 Guided Delivery Systems Inc. Systèmes et procédés pour attaches à rigidité variable
EP2675515A4 (fr) * 2011-02-18 2017-12-06 Ancora Heart, Inc. Systèmes et procédés pour attaches à rigidité variable
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CN106231999A (zh) * 2014-04-21 2016-12-14 皇家飞利浦有限公司 具有带有接合的芯体部件的分离区段的血管内装置、系统和方法
EP3133987A1 (fr) * 2014-04-21 2017-03-01 Koninklijke Philips N.V. Dispositifs, systèmes et procédés intravasculaires ayant des sections distinctes avec des éléments centraux en prise
EP3133987A4 (fr) * 2014-04-21 2017-04-26 Koninklijke Philips N.V. Dispositifs, systèmes et procédés intravasculaires ayant des sections distinctes avec des éléments centraux en prise
US10772564B2 (en) 2014-04-21 2020-09-15 Koninklijke Philips N.V. Intravascular devices, systems, and methods having separate sections with engaged core components
US11864918B2 (en) 2014-04-21 2024-01-09 Philips Image Guided Therapy Corporation Intravascular devices, systems, and methods having separate sections with engaged core components

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