WO2023048142A1 - Dispositif de maintien/libération pour spirale d'embolisation - Google Patents

Dispositif de maintien/libération pour spirale d'embolisation Download PDF

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Publication number
WO2023048142A1
WO2023048142A1 PCT/JP2022/034990 JP2022034990W WO2023048142A1 WO 2023048142 A1 WO2023048142 A1 WO 2023048142A1 JP 2022034990 W JP2022034990 W JP 2022034990W WO 2023048142 A1 WO2023048142 A1 WO 2023048142A1
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WIPO (PCT)
Prior art keywords
coil
stopper
sheath
occluding
holding
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PCT/JP2022/034990
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English (en)
Japanese (ja)
Inventor
京典 白川
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株式会社パイオラックスメディカルデバイス
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Publication of WO2023048142A1 publication Critical patent/WO2023048142A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord

Definitions

  • the present invention relates to an occlusion coil holding/releasing device for holding, for example, an occlusion coil used for treatment of a cerebral aneurysm, etc., and withdrawing it at a desired location.
  • the aneurysm when treating a cerebral artery or the like, the aneurysm is filled with a plurality of occluding coils to block blood flow to prevent rupture, or when administering an anticancer drug, among a plurality of branched blood vessels, BACKGROUND ART Indwelling of a coil for occlusion in a predetermined blood vessel to block blood flow in the blood vessel and facilitate flow of an anticancer drug or the like to other blood vessels to treat the affected area is performed.
  • Patent Document 1 discloses a vascular occlusion coil which is a helical coil and has a proximal end and a pusher having a threaded distal end. A pusher-vaso-occlusive coil assembly is described.
  • the threaded distal end engages the proximal end of the vasoocclusive coil to retain the vasoocclusive coil on the distal end side of the pusher.
  • the vasoocclusive coil is transported to a predetermined position in the blood vessel, and then the pusher is rotated in the opposite direction to disengage the vasoocclusive coil from the screwed distal end, thereby placing the vasoocclusive coil in the predetermined position in the blood vessel.
  • An occlusion coil is placed.
  • an object of the present invention is to provide an occluding coil holding/releasing method that makes it possible to move an occluding coil so that its indwelling position can be adjusted with high precision, and that facilitates the removal of the occluding coil from a stopper. It is to provide a device.
  • an occluding coil holding/releasing device includes a cylindrical sheath, and an occluding coil disposed on the distal end side of the sheath and capable of coming into contact with the distal end of the sheath.
  • a coil an operating linear member that is slidably inserted into the sheath, an operating linear member that is provided at the distal end of the operating linear member, is inserted into the proximal end portion of the occluding coil, and is inserted into the proximal end portion of the closing coil.
  • the sheath and the operating linear member are slid relative to each other so that the proximal end of the occluding coil is attached to the distal end of the sheath.
  • the stopper is disengaged from the inner periphery of the base end of the occluding coil by contact, and the occluding coil is separated from the stopper.
  • the sheath and the operating linear member are relatively slid.
  • the proximal end of the occluding coil contacts the distal end of the sheath, the engagement of the stopper with the inner periphery of the proximal end of the occluding coil is released, and the occluding coil is separated from the stopper. Separation work becomes easier.
  • the operating linear member is pushed and pulled with respect to the sheath. Since the occluding coil can be moved via the linear member, the position of the occluding coil can be appropriately corrected, and the indwelling position can be adjusted with high accuracy.
  • FIG. 1 is a cross-sectional view showing a first embodiment of an occluding coil holding/releasing device according to the present invention, in which an occluding coil is accommodated and held in a catheter;
  • FIG. FIG. 4 is a cross-sectional view of the occlusion coil holding/releasing device in which the occlusion coil is exposed from the catheter;
  • FIG. 10 is a cross-sectional view showing a state in which the occluding coil is detached from the stopper in the holding/releasing device for the occluding coil. It is explanatory drawing which shows the use condition of the coil for same occlusion.
  • FIG. 2 shows a second embodiment of a device for holding and releasing an occluding coil according to the present invention, where (a) is a cross-sectional view of a state in which the stopper and the occluding coil are engaged, and (b) is from the stopper to the occluding coil.
  • FIG. 4 is a cross-sectional view of a state in which the coil is detached;
  • 3 shows a third embodiment of a device for holding and releasing an occluding coil according to the present invention, where (a) is a cross-sectional view of a state in which the stopper and the occluding coil are engaged, and (b) is from the stopper to the occluding coil.
  • FIG. 4 is a cross-sectional view of a state in which the coil is detached
  • 3 shows a third embodiment of a device for holding and releasing an occluding coil according to the present invention, where (a) is a cross-section
  • FIG. 4 is a cross-sectional view of a state in which the coil is detached;
  • FIG. 11 is a cross-sectional view showing a fourth embodiment of a holding/releasing device for an occlusion coil according to the present invention;
  • FIG. 11 is a cross-sectional view showing a fifth embodiment of a holding/releasing device for an occluding coil according to the present invention;
  • FIG. 11 is a cross-sectional view showing a sixth embodiment of a device for holding and releasing an occlusion coil according to the present invention;
  • FIG. 1 A first embodiment of an occlusion coil holding/releasing device according to the present invention will be described below with reference to FIGS. 1 to 4.
  • FIG. 1 A first embodiment of an occlusion coil holding/releasing device according to the present invention will be described below with reference to FIGS. 1 to 4.
  • FIG. 1 A first embodiment of an occlusion coil holding/releasing device according to the present invention will be described below with reference to FIGS. 1 to 4.
  • an occluding coil 30 is placed in a diseased area A such as an aneurysm that has occurred in a tubular organ V such as a blood vessel, or a predetermined blood vessel among a plurality of branched blood vessels is occluded.
  • a diseased area A such as an aneurysm that has occurred in a tubular organ V such as a blood vessel, or a predetermined blood vessel among a plurality of branched blood vessels is occluded.
  • the occluding coil 30 is left in the body for a predetermined purpose.
  • This holding/releasing device 10 for an occluding coil is capable of holding the above-described occluding coil 30 to a predetermined position in the body and releasing it at that position.
  • an occluding coil holding/releasing device 10 (hereinafter also simply referred to as “holding/releasing device 10”) of the first embodiment includes a tubular sheath 20 and a On the distal end 21a side, an occluding coil 30 (hereinafter simply referred to as “coil 30") that can abut against the distal end 21a of the sheath 20, and an operation wire that is slidably inserted into the sheath 20.
  • a member 40 (hereinafter also simply referred to as “linear member 40”), and a tip 41 of the linear member 40, which is inserted into the base end portion 37 of the coil 30 and is attached to the inner circumference of the base end portion 37. and a stopper 50 that is releasably engaged.
  • a cylindrical catheter 15 is arranged outside the sheath 20 .
  • the stopper 50 is normally in a state of being engaged with the inner circumference of the base end portion 37 of the coil 30.
  • the sheath 20 and the linear member 40 are relatively slid, so that the distal end 21a of the sheath 20 and the proximal end of the coil 30 are moved as shown in FIG. 37a abuts to disengage the stopper 50 from the inner circumference of the proximal end portion 37 of the coil 30, and the coil 30 is separated from the stopper 50.
  • FIG. 1 and F2 in FIG. 2 the sheath 20 and the linear member 40 are relatively slid, so that the distal end 21a of the sheath 20 and the proximal end of the coil 30 are moved as shown in FIG. 37a abuts to disengage the stopper 50 from the inner circumference of the proximal end portion 37 of the coil 30, and the coil 30 is separated from the stopper 50.
  • the sheath 20 and the linear member 40 are to be slid relative to each other, for example, the sheath 20 is held and fixed, and the linear member 40 is pulled toward the proximal side or pushed toward the side opposite to the proximal side.
  • the linear member 40 is held and fixed, and the sheath 20 is pulled to the proximal side, pushed to the side opposite to the proximal side, or the sheath 20 and the linear member 40 are mutually pushed and pulled. can be done with
  • proximal end or proximal end means the end (proximal end) closer to the hand of the user who uses the holding/releasing device for the coil for occlusion.
  • distal end or distal end means the proximal end or the end opposite to the proximal end (distal end).
  • the sheath 20 in this embodiment has a cylindrical shape with a constant outer diameter and a constant inner diameter and a predetermined length in the axial direction. As shown in FIG. 3, the base end 37a of the coil 30 abuts against the distal end 21a of the distal end portion 21 of the sheath 20 in the axial direction (longitudinal direction).
  • a cylindrical catheter 15 having a constant outer diameter and a constant inner diameter and extending a predetermined length in the axial direction is arranged.
  • the catheter 15 and sheath 20 are relatively slidable.
  • an occlusion coil 30 is accommodated inside the distal end portion 15a of the catheter 15.
  • the catheter 15 preferably has a lumen through which a guidewire can be passed.
  • the catheter 15 and the sheath 20 are made of, for example, polyethylene (PE), fluororesin, polyoxymethylene (POM), polypropylene (PP), nylon resin, nylon elastomer, polyester, ABS resin, polycarbonate, polyetheretherketone. (PEEK), polyimide, or the like.
  • the closing coil 30 in this embodiment is a coil (close-wound coil in this embodiment) formed by winding a wire rod 31 with a constant diameter at a predetermined pitch. Furthermore, a rounded head portion 35 is fixed to the tip portion 33 of the coil 30 in the axial direction via metal brazing, adhesive, or the like, so that the tubular organ V is less likely to be damaged when the coil 30 is moved. It is configured.
  • the outer diameter of the coil 30 in this embodiment is smaller than the outer diameter of the sheath 20 and larger than the inner diameter. Therefore, the proximal end 37a, which is the most proximal end of the proximal end portion 37 of the coil 30 in the axial direction, can come into contact with the distal end 21a of the distal end portion 21 of the sheath 20 (see FIG. 3).
  • the coil 30 may be shaped into a predetermined shape.
  • the coil 30 is housed and held inside the catheter 15 (see FIG. 1), and the coil 30 is exposed from the inner periphery of the distal end portion 15a of the catheter 15 (see FIGS. 2 and 3).
  • the coil 30 has a straight shape, but in reality, as shown in FIG. It has become.
  • the linear member 40 in this embodiment has a linear shape (wire shape) extending with a constant diameter, and is slidably inserted into the sheath 20 .
  • a stopper 50 is connected to and integrated with the tip 41 of the linear member 40 in the axial direction.
  • the linear member 40 is, for example, a superelastic alloy such as a Ni—Ti alloy, a metal wire such as stainless steel or a piano wire, or a resin such as polyethylene (PE) or polyethylene terephthalate (PET). can be used.
  • a superelastic alloy such as a Ni—Ti alloy
  • a metal wire such as stainless steel or a piano wire
  • a resin such as polyethylene (PE) or polyethylene terephthalate (PET).
  • the stopper 50 in this embodiment has a cylindrical shape extending from its proximal end to its distal end with a constant diameter and a predetermined length.
  • the stopper 50 is separate from the linear member 40 and connected to the tip 41 of the linear member 40 . Further, the stopper 50 is inserted into the base end portion 37 of the coil 30 and can be engaged with and disengaged from the inner circumference of the base end portion 37 (see FIGS. 2 and 3).
  • the outer diameter R1 of the stopper 50 is formed to be slightly larger than the inner diameter R2 of the closing coil 30. Therefore, when the stopper 50 is inserted into the proximal end portion 37 of the coil 30 , the outer periphery of the stopper 50 is pressed against the inner periphery of the proximal end portion 37 of the coil 30 , and the inner periphery of the proximal end portion 37 of the coil 30 is pressed. A stopper 50 is engaged around the circumference (see FIGS. 1 and 2).
  • the coil 30 and the stopper 50 operate as follows.
  • the coil 30 is exposed from the inside of the distal end portion 15a of the catheter 15, and the inner circumference of the proximal end portion 37 of the coil 30 is engaged with the stopper 50.
  • the coil 30 is moved away from the distal end 21a of the sheath 20 via the linear member 40 as indicated by the arrow F1, or when moved via the linear member 40 as indicated by the arrow F2 in FIG.
  • the "disengagement force during movement of the coil” is Since it is smaller than the "engagement force between the coil and the stopper", even if an external force or the like acts unexpectedly during the movement of the coil, the coil 30 and the stopper 50 will be held together if the external force or the like is smaller than the "engagement force between the coil and the stopper". is maintained to prevent the stopper 50 from coming off the inner periphery of the proximal end portion 37 of the coil 30 . As a result, the coil 30 can be pushed and pulled via the linear member 40 .
  • the coil 30 is exposed from the inside of the distal end portion 15a of the catheter 15, and the stopper 50 is engaged with the inner circumference of the proximal end portion 37 of the coil 30.
  • the stopper 50 is moved to the proximal side via the linear member 40, and the sheath 20 is moved as shown in FIG.
  • the proximal end 37a of the coil 30 abuts against the distal end 21a of the coil.
  • the stopper 50 is made of, for example, an elastic material such as rubber, a porous material such as sponge, a metallic material such as a Ni--Ti alloy or stainless steel, or polyethylene (PE) or polyethylene terephthalate ( A resin material such as PET) can be used.
  • the catheter or sheath may have a tapered shape in which the diameter gradually decreases or expands toward the distal end or the proximal end in the axial direction (the tapered shape of the sheath distal end is the fifth embodiment shown in FIG. 8). form), has a shape in which the diameter is gradually reduced or expanded toward the distal end or the proximal end in the axial direction, or has a reduced diameter portion or an expanded diameter portion in the middle of the axial direction. good.
  • the closing coil may be a coil in which a wire is wound with a predetermined gap (coarsely wound coil), or a coil in which a densely wound portion and a loosely wound portion are appropriately combined.
  • a diameter-reduced shape may be provided at the proximal end (a shape in which the diameter of the proximal end is reduced will be described in a fifth embodiment shown in FIG. 8), and a stopper can be engaged and disengaged from the inner periphery of the proximal end. I wish I had.
  • X-ray opaque markers may be placed at predetermined locations on the sheath, occlusive coil, and stopper.
  • the linear member may be a hollow cylindrical member (tube) other than a solid wire such as a wire, or a combination of a solid wire and a hollow cylindrical member ( 7), it is sufficient that it forms a linear shape extending with a predetermined length and is slidably inserted into the sheath, and a stopper can be connected to the distal end of the sheath.
  • a spiral protrusion is provided on the outer circumference (described in the sixth embodiment shown in FIG. 9), and (2) a spherical shape is used.
  • (3) has an elliptical cross-section;
  • (4) has a substantially drum-like shape in which the center in the axial direction swells and gradually narrows toward both ends in the axial direction; It may have a tapered shape that gradually decreases in diameter toward the proximal end (the shape in which the diameter decreases toward the proximal end will be described in a fifth embodiment shown in FIG. 8), or (6) it may have a coil shape. (described in a second embodiment shown in FIG.
  • stopper 50 of this embodiment is separate from the linear member 40, the stopper may be integrally formed on the distal end side of the linear member, and is not particularly limited.
  • the coil 30 is accommodated and held in the inner circumference of the distal end portion 15a of the catheter 15.
  • the stopper 50 is engaged with the inner periphery of the proximal end portion 37 of the coil 30 arranged on the distal end 21a side of the sheath 20, and the coil is pulled through the stopper 50 by pushing and pulling the linear member 40. 30 are movable.
  • the catheter 15 is guided and moved through a guide wire (not shown), and the distal end portion 15a thereof reaches a predetermined position.
  • the distal end portion 15a of the catheter 15 is inserted into the affected area A such as an aneurysm.
  • the linear member 40 is removed while the sheath 20 is held and fixed, as indicated by the arrow F2 in FIG.
  • the stopper 50 moves toward the distal side via the linear member 40, and the sheath is pulled toward the proximal side as shown in FIG. A proximal end 37a of the coil 30 abuts against a distal end 21a of the coil 20 .
  • the stopper 50 is detached from the inner periphery of the base end portion 37 of the coil 30, so that the coil is removed from the stopper 50. 30 can be detached, and the coil 30 can be left in the diseased part A. If the affected area A is an aneurysm or the like, a plurality of coils 30 are placed in the affected area A as shown in FIG.
  • this holding/releasing device 10 after the coil 30 arranged on the distal end 21a side of the sheath 20 is indwelled at a predetermined position in the body via the catheter 15 or the like, the sheath 20 and the linear member 40 are connected. is relatively slid, the proximal end 37a of the coil 30 contacts the distal end 21a of the sheath 20, the engagement of the stopper 50 with the inner periphery of the proximal end 37 of the coil 30 is released, and the stopper 50 Since the coil 30 is detached, detachment work of the coil 30 is facilitated.
  • the position of the coil 30 may be corrected.
  • the position of the coil 30 can be corrected as appropriate. As a result, the placement position of the coil 30 can be adjusted with high accuracy.
  • the coil Since the stopper 50 does not come off from the inner circumference of the proximal end portion 37 of the coil 30, the push-pull operability of the coil 30 is maintained.
  • FIG. 5 shows a second embodiment of an occluding coil holding/releasing device according to the present invention.
  • symbol is attached
  • the holding/releasing device 10A for the occluding coil of the second embodiment differs from that of the first embodiment in the structure of the stopper 50A.
  • the catheter 15 is omitted (the same applies to third to sixth embodiments below).
  • the stopper 50A in this second embodiment has a coil shape formed by winding a wire rod 51 .
  • the stopper 50A is a loosely wound coil formed by winding the wire rod 51 with a predetermined gap, and extends with a constant outer diameter. Further, the outer diameter of the stopper 50A is formed larger than the inner diameter of the coil 30. As shown in FIG. Furthermore, the distal end 41 of the linear member 40 is connected to the proximal end 51a of the stopper 50A.
  • the stopper 50A has an outer shape that can be pressed against the inner circumference of the coil 30, and extends in the axial direction of the coil 30 and the sheath 20 when the sheath 20 and the linear member 40 slide relative to each other.
  • the base end portion 37 of the coil 30 is disengaged from the inner periphery of the coil 30 and separated from the coil 30 .
  • the outer diameter of the stopper 50A of this embodiment is formed to be larger than the inner diameter of the coil 30, as shown in FIG. It is pressed against the inner periphery of the portion 37 . Then, when the sheath 20 and the linear member 40 are relatively slid and the stopper 50A is pulled through the linear member 40, the stopper 50A is pulled by the coil 30 and the coil 30 as shown in FIG. 5(b). Since the sheath 20 extends in the axial direction and has a reduced diameter, the proximal end portion 37 of the coil 30 is disengaged from the inner circumference, and the coil 30 is separated from the stopper 50A.
  • "having an outer shape that can be pressed against the inner periphery of the occluding coil” means that at least a part of the outer shape of the stopper can be pressed against the inner periphery of the occluding coil, and not necessarily.
  • the "outer shape" of the stopper is not limited to one having a continuous "periphery" in the circumferential direction, such as a coil shape as in the second embodiment. It is meant to include such an outer shape.
  • the sheath 20 and the linear member 40 are relatively slid to separate the coil 30 from the stopper 50A.
  • the coil 30 and the sheath 20 extend in the axial direction and their diameters are reduced, and the proximal end portion 37 of the coil 30 is disengaged from the inner circumference, and the coil 30 is separated from the stopper 50A.
  • a large force is not required when releasing the coil 30 from the stopper.
  • the stopper 50A has a coil shape formed by winding the wire 51, so that the flexibility of the stopper 50A itself can be increased, and the detention operation of the occlusion coil 30 in the body is facilitated. easier.
  • FIG. 6 shows a third embodiment of an occluding coil holding/releasing device according to the present invention.
  • symbol is attached
  • a holding/releasing device 10B for an occluding coil of the third embodiment differs from the above embodiment in the structure of a stopper 50B.
  • the stopper 50B in the third embodiment has a cylindrical stent shape made by knitting and/or braiding metal wires.
  • the stopper 50B may be a tubular stent-like member having a plurality of mesh-like openings formed by laser cutting in the circumferential direction of a metal cylinder.
  • the base end portion 53 of the stopper 50B has a tapered shape that gradually reduces in diameter toward the most base end 53a in the axial direction.
  • the distal end 41 of the linear member 40 is connected to the proximal end 53a of the stopper 50B.
  • the stopper 50B has an outer shape capable of being pressed against the inner periphery of the coil 30.
  • the coil 30 and the sheath 20 extend in the axial direction and contract in diameter, and the base end portion 37 of the coil 30 is disengaged from the inner periphery. It is configured to be detached from the coil 30 .
  • the sheath 20 and the linear member 40 are slid relative to each other to move the stopper 50B in the axial direction of the coil 30 and the sheath 20.
  • the linear member 40 is stretched to reduce its diameter, the tensile force from the linear member 40 tends to act in the axial direction and the circumferential direction of the stopper 50B. As a result, it becomes easier to reduce the diameter of the stopper 50B, and the workability of removing the coil 30 from the stopper 50B can be improved.
  • FIG. 7 shows a fourth embodiment of an occluding coil holding/releasing device according to the present invention.
  • symbol is attached
  • a holding/releasing device 10C for an occluding coil according to the fourth embodiment differs from the above embodiment in the structure of an operating linear member 40C.
  • the operating linear member 40C (hereinafter also simply referred to as “linear member 40C”) includes a cylindrical tube 43 and a linear wire 45 slidably inserted into the tube 43.
  • the stopper 50 ⁇ /b>C in this embodiment has a closely-wound coil shape, and is press-contacted with the inner circumference of the base end portion 37 of the coil 30 so as to be engageable/disengageable with respect to the coil 30 .
  • the distal end 43a of the tube 43 is connected to the proximal end of the stopper 50C.
  • the outer diameter of the wire 45 is dimensioned to match the inner diameter of the stopper 50C.
  • the distal end portion 45a of the wire 45 is inserted into the inner circumference of the stopper 50C to restrict the diameter reduction of the stopper 50C.
  • the diameter reduction of the stopper 50C is regulated by the distal end portion 45a of the wire 45. Therefore, when the coil is moved via the linear member 40C, an unexpected When an external force acts, the coil 30 can be prevented from being detached from the stopper 50C, and the coil 30 can be easily placed at a predetermined position in the body.
  • FIG. 8 shows a fifth embodiment of an occluding coil holding/releasing device according to the present invention.
  • symbol is attached
  • the holding/releasing device 10D for an occluding coil of the fifth embodiment (hereinafter also referred to simply as the ⁇ holding/releasing device 10D'') has a shape of the occluding coil 30D (hereinafter also simply referred to as the ⁇ coil 30D'') and a stopper.
  • the shape of 50D is different from the previous embodiment.
  • the distal end portion 21 of the sheath 20D has a shape whose diameter gradually decreases toward the distal end 21a (most distal end) in the axial direction.
  • the coil 30D has a proximal end portion 37 that gradually decreases in diameter toward a proximal end 37a (most proximal end) in the axial direction.
  • a proximal end 37a of the coil 30D can come into contact with the distal end 21a of the sheath 20D.
  • the stopper 50D has a columnar shape, and the proximal end 55a (most proximal end) in the axial direction is the most so that the shape (outer shape) of the outer periphery 55 matches the shape of the proximal end portion 37 of the stopper 50D. It has a shape that decreases in diameter and gradually expands in diameter toward the distal end 55b (most distal end) in the axial direction. Further, the outer diameter dimension of the outer periphery 55 of the stopper 50D is formed slightly smaller than the inner diameter dimension of the base end portion 37 of the coil 30D.
  • the sheath 20 and the linear member 40 are slid relatively to release the coil 30D from the stopper 50D. While the base end portion 37 of the coil 30D is pushed apart, it is gradually pulled out from the base end opening 37b of the coil 30D. Coil 30D can be detached.
  • the base end portion 37 of the coil 30D has a shape that gradually decreases in diameter toward the base end 37a. has an outer shape that gradually expands toward the tip 55b. Therefore, in a state in which the stopper 50D is inserted into the base end portion 37 of the coil 30D, the gradually increasing diameter portion of the stopper 50D is positioned against the gradually decreasing diameter portion of the base end portion 37 of the coil 30D. Since they are arranged facing each other, even if the linear member 40 is pulled toward the hand side, the stopper 50D is unlikely to come off from the base end opening 37b of the coil 30D, so that the engagement force between the stopper 50D and the coil 30D can be increased. can.
  • the outer diameter of the stopper 50D need not be larger than the inner diameter of the coil 30D. Even if the stopper 50D is inserted into the inner circumference, an increase in the outer diameter of the base end portion 37 of the coil 30D can be suppressed. As a result, it becomes easier to slide the coil 30D and the sheath 20 with respect to the catheter 15 and the like (this is the effect of claim 5).
  • the outer diameter of the base end portion 37 of the coil 30 on which the stopper is arranged is equal to that of the coil 30 on which the stopper is not arranged. is slightly larger than the outer diameter of the portion other than the base end portion 37 of the .
  • FIG. 9 shows a sixth embodiment of an occluding coil holding/releasing device according to the present invention.
  • symbol is attached
  • a holding/releasing device 10E for an occluding coil of the sixth embodiment differs from the above embodiment in the shape of a stopper 50E.
  • the stopper 50E of this embodiment has a cylindrical main body 58 with a constant diameter and a predetermined length, and a projection 59 continuously provided on the outer periphery of the main body 58 in a spiral shape. and Then, as shown in FIG. 9, the protrusion 59 can enter the gap between the adjacent wire rods 31, 31 of the coil 30 to be engaged and disengaged.
  • the stopper that can be engaged with and disengaged from the gap between the wires 31, 31 of the coil 30 may be, for example, a protrusion extending in the circumferential direction or an annular protrusion on the outer periphery of the main body 58.
  • the parts may be provided regularly or irregularly.
  • the protrusion 59 of the stopper 50E engages and disengages from the gap between the wire rods 31, 31 of the coil 30, thereby suppressing an increase in the outer diameter of the coil 30 and preventing the coil 30 and the stopper 50E from increasing. Engagement force can be improved.
  • the outer diameter of the main body 58 of the stopper 50E can be made smaller than the inner diameter of the coil 30, it becomes easier to provide a gap between the inner circumference of the coil 30 and the outer circumference of the stopper 50E. can be circulated in the coil 30 .

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Abstract

Pour fournir un dispositif de maintien/libération pour une spirale d'embolisation, par lequel la spirale d'embolisation peut être déplacée, peut être ajustée avec précision à une position à demeure, et peut être facilement libérée d'une butée. Un dispositif de maintien/libération (10) pour une spirale d'embolisation comprend une gaine (20), une spirale d'embolisation (30) disposée de façon à venir en contact avec la pointe de la gaine, un élément linéaire d'actionnement (40), et une butée (50) qui est insérée dans une partie d'extrémité proximale (37) de la spirale d'embolisation (30) et qui est engagée de manière libérable dans celle-ci. La gaine (20) et l'élément linéaire d'actionnement (40) sont glissés l'un par rapport à l'autre, de sorte qu'une extrémité proximale (37a) de la spirale d'embolisation (30) entre en contact avec une pointe (21a) de la gaine (20), la butée (50) est désengagée, et la spirale d'embolisation (30) est libérée.
PCT/JP2022/034990 2021-09-24 2022-09-20 Dispositif de maintien/libération pour spirale d'embolisation WO2023048142A1 (fr)

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JP2021155238 2021-09-24
JP2021-155238 2021-09-24

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040153025A1 (en) * 2003-02-03 2004-08-05 Seifert Paul S. Systems and methods of de-endothelialization
JP2012000327A (ja) * 2010-06-18 2012-01-05 Kaneka Corp ステントデリバリーカテーテル
JP2016512085A (ja) * 2013-03-14 2016-04-25 ストライカー コーポレイションＳｔｒｙｋｅｒ Ｃｏｒｐｏｒａｔｉｏｎ 脈管閉塞デバイス送達システム
JP2021045547A (ja) * 2019-09-17 2021-03-25 デピュイ・シンセス・プロダクツ・インコーポレイテッド 塞栓コイル近位接続要素及び耐延伸性繊維

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040153025A1 (en) * 2003-02-03 2004-08-05 Seifert Paul S. Systems and methods of de-endothelialization
JP2012000327A (ja) * 2010-06-18 2012-01-05 Kaneka Corp ステントデリバリーカテーテル
JP2016512085A (ja) * 2013-03-14 2016-04-25 ストライカー コーポレイションＳｔｒｙｋｅｒ Ｃｏｒｐｏｒａｔｉｏｎ 脈管閉塞デバイス送達システム
JP2021045547A (ja) * 2019-09-17 2021-03-25 デピュイ・シンセス・プロダクツ・インコーポレイテッド 塞栓コイル近位接続要素及び耐延伸性繊維

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