WO2021193140A1 - Protecteur de ballonnet et dispositif support de cathéter à ballonnet - Google Patents

Protecteur de ballonnet et dispositif support de cathéter à ballonnet Download PDF

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Publication number
WO2021193140A1
WO2021193140A1 PCT/JP2021/010033 JP2021010033W WO2021193140A1 WO 2021193140 A1 WO2021193140 A1 WO 2021193140A1 JP 2021010033 W JP2021010033 W JP 2021010033W WO 2021193140 A1 WO2021193140 A1 WO 2021193140A1
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WO
WIPO (PCT)
Prior art keywords
balloon
balloon catheter
tubular portion
end side
support device
Prior art date
Application number
PCT/JP2021/010033
Other languages
English (en)
Japanese (ja)
Inventor
祐八 大嶽
光則 吉川
佳之 齊藤
徹也 福岡
Original Assignee
テルモ株式会社
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
Priority claimed from JP2020051985A external-priority patent/JP2021146135A/ja
Priority claimed from JP2020051986A external-priority patent/JP2021146136A/ja
Application filed by テルモ株式会社 filed Critical テルモ株式会社
Publication of WO2021193140A1 publication Critical patent/WO2021193140A1/fr

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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
    • 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
    • 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
    • A61M25/06—Body-piercing guide needles or the like
    • 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
    • A61M25/10—Balloon catheters

Definitions

  • the present invention relates to a balloon protector for accommodating and protecting a balloon and a balloon catheter support device that can support and insert a balloon catheter together with a balloon catheter into a biological lumen.
  • a balloon catheter usually includes a long shaft portion and a balloon provided on the tip side of the shaft portion and expands in the radial direction, and a contracted balloon is passed through a narrow biological lumen to a target in the body.
  • the lesion can be expanded by expanding it after reaching the location.
  • the balloon before use is usually covered with a resin circular tubular protective tube (see, for example, Patent Document 1).
  • the protective tube keeps the balloon in a contracted state while suppressing the drug from falling off the surface of the balloon.
  • the resin protective tube tends to bend during sterilization performed at the time of packing.
  • the balloon also has a bending habit.
  • the balloon When the protective tube has a bending habit, the balloon also has a bending habit.
  • the balloon When the balloon is bent, when the balloon is bent, the balloon tends to bend when the balloon is pushed in, and the pushability is lowered. Further, it becomes difficult to arrange the balloon in the center of the biological lumen such as a blood vessel at the time of treatment. In addition, the balloon is more likely to be caught in the lumen of the living body during treatment, which reduces the insertability.
  • One aspect of the present invention has been made to solve the above-mentioned problems, suppresses the occurrence of bending habits in the balloon, facilitates the placement of the balloon in the center of the living lumen, and in the living lumen. It is an object of the present invention to provide a balloon protector capable of suppressing a decrease in the insertability and pushability of a balloon.
  • the balloon catheter is required to have a passability that allows it to pass through a meandering biological lumen.
  • the tip of the balloon catheter on which the balloon is provided is required to have pushability for forcibly entering a narrow narrowed portion.
  • the tip of the balloon catheter is made rigid in order to improve the pushability of the tip of the balloon catheter, the passability of the bent portion and the vascular selectivity of the bifurcation portion are reduced.
  • the tip of the balloon catheter is made flexible to improve the passage through the bent portion, the pushability of the balloon catheter tends to decrease.
  • the clearance is relatively large so that the sliding resistance between the relatively long guide wire lumen of the balloon catheter and the guide wire does not increase. Therefore, the guide wire bends in the guide wire lumen, which causes push loss.
  • Another aspect of the present invention has been made to solve the above-mentioned problems, and is a balloon catheter capable of improving the pushability of the balloon catheter while suppressing a decrease in the passability of the balloon catheter in the tortuous biological lumen.
  • the purpose is to provide a support device.
  • the balloon protector that achieves the above object is a balloon protector for protecting the balloon of the balloon catheter, and is a tubular cover formed by winding a wire rod and having a first opening and a second opening. It is characterized by having a portion and a linear portion formed of the same wire rod as the wire rod and extending from the first opening of the cover portion and projecting toward the second opening.
  • the cover portion covers and protects the balloon, and the linear portion is inserted into the lumen of the shaft portion penetrating the balloon of the balloon catheter, so that the cover portion covers the balloon.
  • the condition can be maintained in good condition. Since the cover portion is a wire rod wound in a tubular shape, it is resistant to bending and can prevent the balloon from becoming bent. Therefore, the balloon protector can facilitate the placement of the balloon in the center of the living lumen, and can suppress the deterioration of the insertability and the pushing property of the balloon in the living lumen.
  • the wire rod located in the cover portion is tightly wound, and the cover portion may be able to bend due to elastic deformation.
  • the cover portion can return to a tightly wound state so as to eliminate the gap due to its own restoring force. Therefore, the cover portion is hard to bend, and even if it bends, it can easily return to the original shape, so that it is possible to effectively suppress the balloon from becoming bent.
  • the cover portion may have a reduced diameter portion having an inner diameter that decreases toward the first opening on the side of the first opening.
  • the reduced diameter portion of the cover portion is likely to fit into the shape of the tip portion of the balloon catheter that is reduced in diameter toward the tip end. Therefore, the cover portion is less likely to be displaced from the balloon catheter, and the balloon can be stably protected.
  • the cover portion may have at least one convex portion protruding toward the center of winding.
  • the convex portion can enter the concave portion formed on the surface of the folded balloon. Therefore, the cover portion can have a shape that follows the shape of the balloon. Therefore, the cover portion can satisfactorily hold the folded shape of the balloon. In addition, the cover portion is less likely to come off the balloon, and the balloon can be stably protected.
  • the balloon catheter support device that achieves the above object is a balloon catheter support device for supporting a balloon catheter, which is formed of a tubular portion formed by winding a wire rod into a tubular portion and the same wire rod as the wire rod.
  • the tubular portion has a linear portion extending from the proximal end portion toward the proximal end, and the tubular portion includes a proximal end side tubular portion arranged on the proximal end side and the proximal end side tubular portion. It has a distal end side tubular portion arranged on the distal end side, and the winding radius of the distal end side tubular portion is smaller than the winding radius of the proximal end side tubular portion.
  • the distal end side tubular portion surrounds the distal end portion of the balloon catheter, and the distal end side tubular portion provides a guide wire that penetrates the balloon catheter and projects toward the distal end side of the balloon catheter.
  • the enclosure and linear portion can be extended along the balloon catheter toward the proximal end.
  • the distal end side tubular portion and the proximal end side tubular portion may have the same axial center and be lined up.
  • the axial center of the tip of the balloon catheter surrounded by the proximal tubular portion and the axial center of the guide wire surrounded by the proximal tubular portion are likely to coincide with each other. Therefore, since the balloon catheter and the balloon catheter support device tend to move straight along the guide wire, the pushing force can be efficiently applied to the pushing target. Therefore, the balloon catheter support device can improve the pushability of the balloon catheter.
  • the clearance with the lumen such as the guide wire lumen of the balloon catheter remains large, it is possible to effectively prevent the guide wire passing through the lumen of the balloon catheter from becoming difficult to move in the lumen of the balloon catheter, resulting in push loss. It can be reduced to improve the pushability of the balloon catheter in the living lumen.
  • At least a part of the tubular portion may be tightly wound.
  • the tubular portion is formed of the wound wire rod to have flexibility, but the flexural rigidity can be improved by tight winding. Therefore, it is possible to improve the pushability while suppressing the decrease in the passage of the balloon catheter in the meandering biological lumen.
  • At least a part of the tubular portion may be loosely wound. This increases the flexibility of the tubular portion. Therefore, it is possible to suppress a decrease in passability of the balloon catheter in the meandering biological lumen.
  • the tubular portion may be elastically deformable. As a result, the tubular portion maintains its flexibility, so that it is possible to suppress a decrease in passability in the meandering biological lumen of the balloon catheter. Further, since the tubular portion can be restored to its original shape by elastic force even if it is deformed, the pushability of the balloon catheter in the biological lumen can be improved.
  • the linear portion may have a separating portion at a position close to the tubular portion and separated from the axial center of the tubular portion in a direction perpendicular to the axial center. Thereby, the linear portion can extend toward the proximal end side of the balloon without being hindered by the balloon protruding outward in the radial direction of the balloon catheter.
  • (A) is a plan view
  • (B) is a sectional view. It is a top view which shows the balloon catheter housed in a holder tube.
  • (A) is a plan view
  • (B) is a front view seen from the tip side. It is a top view which shows the bent state of the balloon housed in a balloon protector. It is a top view which shows the 1st modification of a balloon protector. It is sectional drawing which shows the 2nd modification of a balloon protector.
  • FIG. 1 It is a cross-sectional view which shows the 3rd modification of a balloon protector, (A) is a plan view, (B) is a cross-sectional view along line AA of (A). It is a figure which shows the state which supported the balloon catheter and the guide wire by the balloon catheter support device which concerns on this embodiment, (A) is a plan view, (B) is a sectional view. It is a figure which shows the balloon catheter support device which concerns on this embodiment, (A) is a plan view, (B) is a front view seen from the tip side.
  • FIG. A modified example of is shown. It is a top view which shows the 5th modification of the balloon catheter support device. It is a figure which shows the sixth modification of the balloon catheter support device, (A) is a plan view, (B) is a cross-sectional view along line AA of (A).
  • the balloon protector 10 is a device that covers the balloon 70 of the balloon catheter 40 and protects the balloon 70 before being used for treatment from deformation or damage.
  • the balloon protector 10 is housed in the holder tube 30 together with the balloon catheter 40, and is stored and transported. The balloon protector 10 is removed from the balloon 70 before using the balloon catheter 40.
  • the balloon catheter 40 housed in the balloon protector 10 and the holder tube 30 will be described.
  • the balloon catheter 40 has a long shaft portion 50, a hub 60 fixed to the base end of the shaft portion 50, and a balloon 70 provided at the tip end portion of the shaft portion 50. ing.
  • the shaft portion 50 includes an outer pipe 51 and an inner pipe 52 arranged inside the outer pipe 51.
  • An expansion lumen 53 through which an expansion fluid for expanding the balloon 70 flows is formed between the outer tube 51 and the inner tube 52.
  • a guide wire lumen 54 into which a guide wire can be inserted is formed inside the inner pipe 52.
  • the hub 60 includes a first hub opening 61 that communicates with the expansion lumen 53 of the outer pipe 51 and functions as a port for inflowing and discharging the expansion fluid, and a second hub opening 62 that communicates with the guide wire lumen 54. ing.
  • the expansion fluid flows in from the first hub opening 61, the expansion fluid flows into the inside of the balloon 70 via the expansion lumen 53. As a result, the balloon 70 expands outward in the radial direction.
  • the balloon 70 is a portion that expands the narrowed portion or the like by expanding.
  • the outer surface of the balloon 70 may be coated with a drug layer 71 for suppressing stenosis.
  • a stent that is plastically deformed by the expansion of the balloon 70 and placed in the narrowed portion may be placed on the outer surface of the balloon 70.
  • the tip end side of the balloon 70 is joined to the outer wall surface of the inner pipe 52 in a state of maintaining liquidtightness.
  • the base end side of the balloon 70 is joined to the outer wall surface of the tip end portion of the outer tube 51 in a state of maintaining liquidtightness.
  • the inside of the balloon 70 communicates with the expansion lumen 53, and the expansion fluid can flow in from the proximal end side through the expansion lumen 53.
  • the balloon 70 expands by the inflow of the expansion fluid, and contracts by discharging the inflowing expansion fluid.
  • the inner pipe 52 and the outer pipe 51 preferably have a structure having appropriate flexibility and appropriate rigidity.
  • the constituent materials of the inner tube 52 and the outer tube 51 are, for example, a polymer material such as polyethylene, polypropylene, polyvinyl chloride, polyamide, polyamide elastomer, polyurethane, polyurethane elastomer, polyimide, fluororesin, or a mixture thereof, or the above two types.
  • These are multilayer tubes made of the above-mentioned polymer materials.
  • the constituent material of the balloon 70 is preferably flexible to some extent, for example, polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer, or a mixture of two or more thereof.
  • polyethylene polypropylene, polybutene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer, or a mixture of two or more thereof.
  • the balloon catheter 40 described above is a so-called over-the-wire type (Over the wire type) in which an opening on the proximal end side of the guide wire lumen 54 is formed in the hub 60.
  • the balloon catheter 40 may be a so-called rapid exchange type in which an opening on the proximal end side of the guide wire lumen 54 is formed in the shaft portion 50.
  • the holder tube 30 holds the shape of the tubular accommodating portion 31 that internally accommodates the balloon catheter 40, the connecting portion 32 that can connect the base end portion of the balloon catheter 40, and the accommodating portion 31.
  • the holding portion 33 is provided.
  • the accommodating portion 31 is a wound tube.
  • the accommodating portion 31 accommodates the balloon catheter 40 so that it can be pulled out.
  • the holding portion 33 is a member that connects adjacent portions by being wound around the accommodating portion 31.
  • the connecting portion 32 is a straight tube, and the accommodating portion 31 is inserted and connected to one end side, and the balloon catheter 40 can be inserted into the other end side.
  • the balloon catheter 40 can be connected by fitting the hub 60 of the inserted balloon catheter 40 to the other end side of the connecting portion 32.
  • the connecting portion 32 may be formed integrally with the accommodating portion 31.
  • the portion of the accommodating portion 31 in which the balloon 70 and the balloon protector 10 are accommodated is formed linearly, but at least a part thereof may be curved.
  • the constituent materials of the accommodating portion 31, the connecting portion 32, and the holding portion 33 are not particularly limited, and are, for example, polyolefins such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, and polystyrene. , Polyamide, polyimide, etc.
  • the balloon protector 10 is formed of a single wire rod 11.
  • the balloon protector 10 extends from a tubular cover portion 14 having a first opening 12 and a second opening 13 by winding a wire rod 11 and a first opening 12 of the cover portion 14. It is provided with a linear portion 15 to be formed.
  • the cover portion 14 is formed in a substantially circular tubular shape by spirally winding the wire rod 11.
  • the circular tubular cover portion 14 is opened by the first opening 12 and the second opening 13.
  • the wire rods 11 forming the cover portion 14 are wound in a circular tubular shape so as to be adjacent to each other side by side along the axis X of the circular tube.
  • the axis X of the circular tube is preferably linear, but may be slightly curved. Adjacent parts of the wire rod 11 come into contact with each other. That is, the wire rod 11 is tightly wound around the cover portion 14. It should be noted that the adjacent portions of the wire rods 11 forming the cover portion 14 do not have to come into contact with each other. Therefore, the wire rod 11 may be loosely wound with adjacent portions separated from each other. Further, a part of the wire rod 11 forming the cover portion 14 may be tightly wound, and the other portion may be loosely wound.
  • the linear portion 15 extends from the first opening 12 of the cover portion 14 and curves, and the linear portion 15 extends from the first opening 12 to the second opening 13 along the axial center X of the circular pipe. It is provided with a support portion 17 that projects toward it.
  • the connecting portion 16 extends from the tip of the cover portion 14 and gradually changes its direction, and is curved until it faces the proximal end direction on the extension line of the axis X.
  • the shape of the connecting portion 16 is not limited as long as the cover portion 14 and the supporting portion 17 can be connected, and may not be curved, for example.
  • the support portion 17 is a portion that is inserted into the guide wire lumen 54 of the shaft portion 50 from the tip side and is supported by the shaft portion 50.
  • the support portion 17 projects from the connecting portion 16 along the axial center X in the proximal direction.
  • the support portion 17 is preferably located on the axis X, but may deviate from the axis X.
  • the support portion 17 preferably extends linearly from the connection portion 16 in the proximal direction, but may be curved.
  • the support portion 17 enters the inside of the cover portion 14 from the first opening portion 12 and extends from the second opening portion 13 to the proximal end side. This makes it easier to insert the support portion 17 into the guide wire lumen 54 of the shaft portion 50.
  • the base end portion of the support portion 17 may be arranged inside the cover portion 14 or may be arranged at a position corresponding to the second opening portion 13.
  • the wire diameter of the wire rod 11 is not particularly limited, but is preferably smaller than the inner diameter of the guide wire lumen 54 so that it can be inserted into the guide wire lumen 54 of the shaft portion 50.
  • cover portion 14 and the linear portion 15 are elastically deformable. As a result, the cover portion 14 and the linear portion 15 can return to their original shapes even if they are deformed by receiving a force.
  • the cover portion 14 and the linear portion 15 may be plastically deformable.
  • the constituent material of the wire 11 is not particularly limited, but is, for example, stainless steel, Ni—Ti alloy, tungsten, cemented carbide and the like. Further, the wire rod 11 may be formed by annealing any of these metal materials to memorize the shape.
  • the surface of the wire rod 11 may be coated with a low friction material that reduces frictional resistance. Examples of the low friction material include a fluororesin material such as polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • the low friction material may be coated only on a part of the wire rod 11. For example, the low friction material may be coated only on the inner peripheral surface of the cover portion 14 that comes into contact with the balloon 70.
  • the base end of the support portion 17 of the linear portion 15 is inserted into the guide wire lumen 54 of the shaft portion 50, and the balloon is provided with the cover portion 14.
  • Cover 70 As a result, the support portion 17 is inserted into the guide wire lumen 54, so that the cover portion 14 can maintain a good position with respect to the balloon 70. Since the cover portion 14 has a spiral shape, it is difficult to bend. Therefore, the cover portion 14 can prevent the balloon 70 from becoming bent. In addition, the cover portion 14 can prevent the drug layer 71 on the surface of the balloon 70 from peeling off. Further, as shown in FIG.
  • the cover portion 14 and the linear portion 15 that can be elastically deformed are formed.
  • the cover portion 14 and the linear portion 15 that return to the original straight shape can straighten the holding balloon 70 and the shaft portion 50 into a straight shape. Since the original shape of the cover portion 14 is a shape in which the wire rod 11 is tightly wound, it can be surely returned to the original shape.
  • the balloon protector 10 tries to return to the original straight shape in the gap between the balloon protector 10 and the lumen of the holder tube 30, so that the balloon 70 The balloon 70 becomes straight while suppressing bending habits.
  • the operator pulls out the balloon catheter 40 covered with the balloon protective device 10 from the holder tube 30.
  • the balloon 70 and the balloon protector 10 pass through the wound portion of the holder tube 30.
  • the balloon 70 is protected by the balloon protector 10. Therefore, it is possible to prevent the drug layer 71 from peeling off from the balloon 70.
  • the balloon 70 may be bent as it passes through the wound portion of the holder tube 30.
  • the balloon 70 is covered with the balloon protective device 10, it is difficult to bend. Even if the balloon 70 is bent, the balloon protector 10 that bends together with the balloon 70 can elastically return to its original shape. Therefore, when the balloon 70 is pulled out from the holder tube 30, it can return to its original linear shape.
  • the operator moves the balloon protector 10 toward the tip of the balloon catheter 40.
  • the support portion 17 is pulled out from the guide wire lumen 54, and the cover portion 14 is removed from the balloon 70.
  • the balloon 70 protected by the balloon protector 10 and the inner tube 52 inside the balloon 70 are straight because they have almost no bending habit. Therefore, the balloon 70 inserted into the biological lumen such as a blood vessel can be easily arranged at the center of the biological lumen, and the operability of the balloon catheter 40 is improved. Further, since the balloon 70 and the inner tube 52 inside the balloon 70 are straight, the balloon 70 is less likely to be caught in the lumen of the living body during the procedure.
  • the insertability of the balloon catheter 40 is improved, and the peeling of the drug layer 71 on the surface of the balloon 70 can be suppressed. Further, since the balloon 70 and the inner tube 52 inside the balloon 70 are straight, the inner tube 52 inside the balloon 70 and the balloon 70 is less likely to bend when the balloon 70 is pushed in. Therefore, the pushability of the balloon catheter 40 is improved.
  • the balloon protector 10 is the balloon protector 10 for protecting the balloon 70 of the balloon catheter 40, and the wire rod 11 is wound around the first opening 12 and the second opening 12.
  • the cover portion 14 formed in a tubular shape having the opening portion 13 of the above, and the wire rod portion 11 which is the same as the wire rod portion 11, extends from the first opening portion 12 of the cover portion 14 toward the second opening portion 13. It has a protruding linear portion 15.
  • the balloon protector 10 configured as described above covers and protects the balloon 70 with the cover portion 14, and inserts the linear portion 15 into the lumen of the shaft portion 50 penetrating the balloon 70 of the balloon catheter 40.
  • the state in which the cover portion 14 covers the balloon 70 can be maintained satisfactorily. Since the cover portion 14 is a wire rod 11 wound in a tubular shape, it is resistant to bending and can prevent the balloon 70 from becoming bent. Therefore, the balloon protective device 10 can facilitate the placement of the balloon 70 in the center of the living lumen, and can suppress the deterioration of the insertability and the pushing property of the balloon 70 in the living lumen.
  • the wire rod 11 located in the cover portion 14 is tightly wound, and the cover portion 14 can be bent by elastic deformation.
  • the cover portion 14 can return to a tightly wound state so as to eliminate the gap due to its own restoring force. .. Therefore, the cover portion 14 is hard to bend and can easily return to the original shape even if it bends, so that it is possible to effectively suppress the balloon 70 from having a bending habit. Therefore, for example, even if the balloon 70 and the cover portion 14 are stored for a long period of time in a bent state under a load, they can be easily returned to their original shape with less bending by being released from the load.
  • the present invention is not limited to the above-described embodiment, and various modifications can be made by those skilled in the art within the technical idea of the present invention.
  • the balloon 70 but also the shaft portion 50, the outer pipe 51 or the inner pipe 52 may be linear.
  • the cover portion 14 has a reduced diameter portion 18 having an inner diameter decreasing toward the first opening 12 on the first opening 12 side. You may. As a result, the reduced diameter portion 18 of the cover portion 14 can easily fit into the shape of the tip portion of the balloon catheter 40 whose diameter is reduced toward the tip end. Therefore, the cover portion 14 is less likely to be displaced from the balloon catheter 40, and the balloon 70 can be stably protected.
  • a flexible circular tubular protective tube 19 made of resin may be arranged between the cover portion 14 and the balloon 70. Thereby, the peeling of the drug layer 71 from the balloon 70 can be effectively suppressed.
  • the cover portion 14 may have at least one convex portion 20 projecting toward the center of the winding.
  • four convex portions 20 are formed in the circumferential direction at each portion of the wire rod 11 forming the cover portion 14 that is adjacent to each other in the direction along the axis X.
  • Each of the convex portions 20 can enter the concave portion between the plurality of blade portions 72 formed in the balloon 70 folded on the outer peripheral surface of the inner pipe 52. Therefore, the cover portion 14 can have a shape that follows the shape of the balloon 70. Therefore, the cover portion 14 can satisfactorily hold the folded shape of the balloon 70. Further, the cover portion 14 is less likely to be displaced from the balloon 70, and the balloon 70 can be stably protected.
  • the balloon catheter support device 10 covers the tip of the balloon catheter 40 and the guide wire 30 that is inserted into the balloon catheter 40 and protrudes from the balloon catheter 40, and covers the balloon catheter 40 and the guide wire 30.
  • the balloon catheter support device 10 can be inserted into a living lumen such as a blood vessel together with the balloon catheter 40 and the guide wire 30.
  • the balloon catheter 40 has a long shaft portion 50, a hub 60 fixed to the base end of the shaft portion 50, and a balloon 70 provided at the tip end portion of the shaft portion 50.
  • the shaft portion 50 includes an outer pipe 51 and an inner pipe 52 arranged inside the outer pipe 51.
  • An expansion lumen 53 through which an expansion fluid for expanding the balloon 70 flows is formed between the outer tube 51 and the inner tube 52.
  • a guide wire lumen 54 into which the guide wire 30 can be inserted is formed inside the inner pipe 52.
  • the hub 60 includes a first hub opening 61 that communicates with the expansion lumen 53 of the outer pipe 51 and functions as a port for inflowing and discharging the expansion fluid, and a second hub opening 62 that communicates with the guide wire lumen 54. ing.
  • the expansion fluid flows in from the first hub opening 61, the expansion fluid flows into the inside of the balloon 70 via the expansion lumen 53. As a result, the balloon 70 expands outward in the radial direction.
  • the balloon 70 is a portion that expands the narrowed portion or the like by expanding.
  • the outer surface of the balloon 70 may be coated with a drug layer 71 for suppressing stenosis.
  • a stent that is plastically deformed by the expansion of the balloon 70 and placed in the narrowed portion may be placed on the outer surface of the balloon 70.
  • the balloon 70 includes a tip joining portion 72 joined to the inner pipe 52, a base end joining portion 73 joined to the outer pipe 51, and an expandable and contractible expansion portion 74.
  • the tip joining portion 72 is located at the tip of the balloon 70 and is joined to the outer wall surface of the inner pipe 52 in a state of maintaining liquidtightness.
  • the base end joining portion 73 is located at the base end of the balloon 70 and is joined to the outer wall surface of the tip end portion of the outer pipe 51 in a state of maintaining liquidtightness.
  • the extension portion 74 is located between the tip end joint portion 72 and the base end joint portion 73, and forms a space capable of accommodating the fluid between the extension portion 74 and the outer wall surface of the inner pipe 52.
  • the inside of the expansion portion 74 communicates with the expansion lumen 53, and the expansion fluid can flow in from the proximal end side through the expansion lumen 53.
  • the expansion unit 74 expands by the inflow of the expansion fluid, and contracts by discharging the inflowing expansion fluid.
  • the balloon catheter 40 has a catheter tip portion 75 (see FIG. 10A) that does not expand in the radial direction and is formed by the tip joining portion 72 and the inner tube 52 on the distal end side of the expansion portion 74.
  • the catheter tip 75 may include a flexible tip that is joined to the tip of the inner tube 52.
  • the inner pipe 52 and the outer pipe 51 preferably have a structure having appropriate flexibility and appropriate rigidity.
  • the constituent materials of the inner tube 52 and the outer tube 51 are, for example, a polymer material such as polyethylene, polypropylene, polyvinyl chloride, polyamide, polyamide elastomer, polyurethane, polyurethane elastomer, polyimide, fluororesin, or a mixture thereof, or the above two types. It is a single-layer or multi-layer tube made of the above-mentioned polymer material.
  • the constituent material of the balloon 70 is preferably flexible to some extent, for example, polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer, or a mixture of two or more thereof.
  • polyethylene polypropylene, polybutene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer, or a mixture of two or more thereof.
  • the balloon catheter 40 described above is a so-called over-the-wire type (Over the wire type) in which an opening on the proximal end side of the guide wire lumen 54 is formed in the hub 60.
  • the balloon catheter 40 may be a so-called rapid exchange type in which an opening on the proximal end side of the guide wire lumen 54 is formed in the shaft portion 50.
  • the guide wire 30 is used by being inserted into the guide wire lumen 54 of the balloon catheter 40.
  • the guide wire 30 is used in a state of projecting from the guide wire lumen 54 of the balloon catheter 40 toward the distal end side, and precedes the biological lumen of the balloon catheter 40.
  • the guide wire 30 can guide the balloon catheter 40 to a target position.
  • the guide wire 30 has an outer diameter smaller than the inner diameter of the guide wire lumen 54 so that the guide wire lumen 54 can slide.
  • the configuration of the guide wire 30 is not particularly limited, but is formed by coating a wire made of various metal materials such as Ni—Ti alloy, stainless steel, piano wire, cobalt alloy, and superelastic alloy with a resin material. Will be done.
  • the balloon catheter support device 10 is formed of a single wire rod 11 as shown in FIGS. 8 and 9.
  • the balloon catheter support device 10 is based on a tubular portion 14 formed by winding a wire rod 11 and having a first opening 12 and a second opening 13 and a second opening 13 of the tubular portion 14. It is provided with a linear portion 15 extending to the end side.
  • the tubular portion 14 is formed into a substantially circular tubular shape by spirally winding the wire rod 11.
  • the circular tubular portion 14 is opened at the first opening 12 and the second opening 13.
  • the wire rods 11 forming the tubular portion 14 are wound in a circular tubular shape so as to be aligned and adjacent to each other along the axial center X of the circular tube.
  • the tubular portion 14 includes a proximal end side tubular portion 16 arranged on the proximal end side, a distal end side tubular portion 17 arranged on the distal end side of the proximal end side tubular portion 16, and a distal end side tubular portion 17 and a proximal end tubular portion. It has a step 18 between 14.
  • the winding radius of the distal end side tubular portion 17 (distance from the center of winding to the central axis of the wire rod 11) is smaller than the winding radius of the proximal end side tubular portion 16.
  • the distal end side tubular portion 17 and the proximal end side tubular portion 16 have the same axial center X and are arranged side by side.
  • the axis X is preferably linear, but may be slightly curved.
  • the base end side tubular portion 16 is a portion that covers the balloon tip portion 75 with a small clearance.
  • the inner diameter of the base end side tubular portion 16 is preferably about the same as or slightly larger than the outer diameter of the balloon tip portion 75 to be accommodated. As a result, the base end side tubular portion 16 is slidably contacted with the outer peripheral surface of the balloon tip portion 75.
  • the inner diameter of the proximal end side tubular portion 16 may increase toward the proximal end side.
  • the tip side tubular portion 17 is a portion that covers the guide wire 30 with a small clearance.
  • the inner diameter of the distal end side tubular portion 17 is smaller than the inner diameter of the proximal end side tubular portion 16. Further, the inner diameter of the distal tubular portion 17 may be smaller than the outer diameter of the distal end of the balloon catheter 40 (in the present embodiment, the outer diameter of the inner tube 52). As a result, it is possible to prevent the tip of the balloon catheter 40 from entering the distal tubular portion 17. It is preferable that the inner diameter of the distal end side tubular portion 17 is smaller than the inner diameter of the guide wire lumen 54 and is about the same as or slightly larger than the outer diameter of the guide wire 30 to be accommodated.
  • the deflection due to the clearance between the guide wire 30 and the tubular portion 17 on the tip side is smaller than the deflection due to the clearance between the guide wire 30 and the guide wire lumen 54, so that the pushability when the guide wire is pushed in by hand reaches the tip. It becomes possible to transmit and the passage of the narrowed part is improved.
  • the tip-side tubular portion 17 slidably contacts the outer peripheral surface of the balloon tip portion 75.
  • the inner diameter of the distal end side tubular portion 17 may increase toward the proximal end side.
  • the adjacent portions come into contact with each other due to the winding of the wire rod 11. That is, the wire rod 11 is tightly wound in the distal end side tubular portion 17 and the proximal end side tubular portion 16. It should be noted that the adjacent portions of the wire rods 11 forming the tubular portion 14 do not have to come into contact with each other as in the first modification shown in FIG. 11 (A). Therefore, the wire rod 11 may be loosely wound with adjacent portions separated from each other. Further, as in the second modification shown in FIG. 11B, the distal end side tubular portion 17 may be loosely wound and the proximal end side tubular portion 16 may be tightly wound. Further, as in the third modification shown in FIG.
  • the distal end side tubular portion 17 may be tightly wound and the proximal end side tubular portion 16 may be loosely wound. Further, as in the fourth modification shown in FIG. 11D, the step 18 and the inner diameter of the proximal end side tubular portion 16 may be formed so as to expand toward the proximal end side.
  • the linear portion 15 includes a separating portion 19 connected to the proximal end portion of the tubular portion 14 and a long portion 20 extending from the proximal end portion of the separating portion 19 toward the proximal end side. And have.
  • the separation portion 19 is inclined with respect to the axis X so as to move from the second opening 13 toward the proximal end side so as to be separated from the axis X in a direction perpendicular to the axis X.
  • the long portion 20 extends along the axis X.
  • the long portion 20 is formed with a length that reaches the vicinity of the hub 60 of the balloon catheter 40 when the tubular portion 14 is put on the tip end portion of the balloon catheter 40. As a result, the long portion 20 can be operated together with the balloon catheter 40.
  • the elongated portion 20 preferably extends linearly from the separating portion 19 in the proximal direction, but may be curved.
  • the linear portion 15 does not have to have a separating portion 19 that is separated from the axial center X in the direction perpendicular to the axial center X.
  • tubular portion 14 and the linear portion 15 are elastically deformable. As a result, the tubular portion 14 and the linear portion 15 can return to their original shapes even if they are deformed by receiving a force.
  • the tubular portion 14 and the linear portion 15 may be plastically deformable.
  • the constituent material of the wire 11 is not particularly limited, but is, for example, stainless steel, Ni—Ti alloy, tungsten, cemented carbide and the like. Further, the wire rod 11 may be formed by annealing any of these metal materials to memorize the shape.
  • the surface of the wire rod 11 may be coated with a low friction material that reduces frictional resistance. Examples of the low friction material include a fluororesin material such as polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • the low friction material may be coated only on a part of the wire rod 11. Alternatively, a hydrophilic lubricating material may be coated as the low friction material.
  • the hydrophilic lubricating material can be fixed to the wire rod 11 by a chemical bond such as an ionic bond or a covalent bond, or a physical bond.
  • a hydrophilic polymer can be applied as the hydrophilic lubricating material.
  • the hydrophilic polymer is a cellulose-based polymer substance, a polyethylene oxide-based polymer substance, a maleic anhydride-based polymer substance (for example, a maleic anhydride copolymer such as a methyl vinyl ether-maleic anhydride copolymer), or an acrylamide-based polymer.
  • Examples thereof include high molecular weight substances (for example, block copolymers of polyacrylamide and glycidyl methacrylate-dimethylacrylamide), water-soluble nylon, polyvinyl alcohol, polyvinylpyrrolidone, and derivatives thereof.
  • high molecular weight substances for example, block copolymers of polyacrylamide and glycidyl methacrylate-dimethylacrylamide
  • water-soluble nylon for example, block copolymers of polyacrylamide and glycidyl methacrylate-dimethylacrylamide
  • polyvinyl alcohol for example, polyvinyl alcohol, polyvinylpyrrolidone, and derivatives thereof.
  • the surgeon punctures a blood vessel through the skin, places an introducer (not shown), and advances the guiding catheter (not shown) to the front of the lesion.
  • the guide wire 30 is inserted into the guide wire lumen 54 of the balloon catheter 40.
  • the tip of the guide wire 30 projects toward the tip of the balloon catheter 40, and the base of the guide wire 30 protrudes toward the base of the balloon catheter 40.
  • the guide wire 30 and the catheter tip 75 are inserted into the second opening 13 of the balloon catheter support device 10. Then, as shown in FIG.
  • the proximal end side tubular portion 16 is covered with the catheter tip portion 75, and the distal end side tubular portion 17 is placed on a portion of the guide wire 30 protruding toward the distal end side from the guide wire lumen 54. Cover.
  • the guide wire 30 may be inserted into the balloon catheter 40 and the balloon catheter support device 10 after covering the catheter tip portion 75 with the proximal end tubular portion 14. Since the inner diameter of the distal tubular portion 17 is smaller than the outer diameter of the distal end of the balloon catheter 40, the distal end of the balloon catheter 40 does not enter the distal tubular portion 17.
  • the distal end surface of the balloon catheter 40 abuts on the step 18 between the distal tubular portion 17 and the proximal tubular portion 14.
  • the outer peripheral surface of the guide wire 30 comes into contact with the inner peripheral surface of the distal tubular portion 17 with a small clearance, and the outer peripheral surface of the catheter tip 75 is brought into contact with the inner peripheral surface of the proximal tubular portion 16.
  • the axial center of the guide wire lumen 54 located at the tip end portion 75 of the catheter and the axial center of the guide wire 30 arranged at the guide wire lumen 54 are substantially aligned and maintained in a aligned state.
  • the tubular portion 14 is formed of the wound wire rod 11 to maintain a certain degree of flexibility. Therefore, it is possible to suppress a decrease in the passability of the balloon catheter 40 supported by the balloon catheter support device 10 in the meandering biological lumen.
  • the operator inserts the guide wire 30, the balloon catheter 40, and the balloon catheter support device 10 into the blood vessel from the inside of the guiding catheter. Subsequently, the balloon catheter 40 is advanced while leading the guide wire 30. At this time, the balloon catheter 40 and the balloon catheter support device 10 can be integrally moved along the guide wire 30 in a state where the catheter tip portion 75 is housed in the proximal end side tubular portion 16. At this time, the guide wire 30 slides on the inner peripheral surface of the distal tubular portion 17 of the balloon catheter support device 10. The clearance between the inner peripheral surface of the distal tubular portion 17 of the balloon catheter support device 10 and the outer peripheral surface of the guide wire 30 is the inner peripheral surface of the guide wire lumen 54 of the balloon catheter 40 and the outer peripheral surface of the guide wire 30.
  • the balloon catheter 40 can be smoothly moved along the guide wire 30 to smoothly pass through the meandering blood vessel.
  • the tip-side tubular portion 17 covers the guide wire 30, and the proximal end-side tubular portion 16 is the catheter tip portion 75.
  • the balloon catheter support device 10 may be moved toward the distal end side with respect to the balloon catheter 40 by manipulating the linear portion 15 so as not to cover the balloon catheter 40.
  • the balloon catheter 40 and the guide wire 30 are not connected by the balloon catheter support device 10, so that the flexibility of the tip portion of the balloon catheter 40 is not impaired.
  • the linear portion 15 When the linear portion 15 is operated to move the balloon catheter support device 10 toward the proximal end side with respect to the balloon catheter 40, the proximal tubular portion 14 of the balloon catheter support device 10 is put on the catheter tip portion 75 again. Can be done. In this way, by manipulating the linear portion 15 as necessary, the proximal end side tubular portion 16 of the balloon catheter support device 10 can be put on the catheter tip portion 75 or separated from the catheter tip portion 75. .. Therefore, the flexibility of the tip of the balloon catheter 40 can be easily adjusted even when the balloon catheter 40 is inserted into the living lumen.
  • the axial center of the proximal end side tubular portion 16 and the axial center of the distal end side tubular portion 17 substantially coincide with each other, and the outer peripheral surface of the guide wire 30 contacts the inner peripheral surface of the distal end side tubular portion 17 with a small clearance. Therefore, in a state where the proximal end side tubular portion 16 is separated from the catheter tip portion 75, the gap between the inner peripheral surface of the proximal end side tubular portion 16 and the outer peripheral surface of the guide wire 30 is maintained substantially constant. Therefore, the catheter tip portion 75 can be easily inserted into the gap between the inner peripheral surface of the proximal end side tubular portion 16 and the outer peripheral surface of the guide wire 30. In other words, the proximal end side tubular portion 16 can be easily put on the catheter tip portion 75.
  • the operator can push the balloon catheter 40 in which the catheter tip portion 75 is housed in the proximal end side tubular portion 16 into the stenosis portion.
  • the tip of the balloon catheter 40 is reinforced by the balloon catheter support device 10. Therefore, the pushability of the balloon catheter 40 is improved. Therefore, the operator can effectively push the balloon 70 into the stenosis.
  • the guide wire 30 slides on the inner peripheral surface of the distal tubular portion 17 of the balloon catheter support device 10. As described above, since the clearance between the distal tubular portion 17 and the guide wire 30 is smaller than the clearance between the guide wire lumen 54 and the guide wire 30, the axis of the guide wire 30 is the balloon catheter support device 10.
  • the state of substantially matching the axis of the catheter tip portion 75 is maintained. Therefore, the surgeon can push the balloon catheter 40 and the balloon catheter support device 10 substantially straight along the guide wire 30, so that the pushing force can be efficiently applied. Therefore, the pushability of the balloon catheter 40 is improved. Further, if necessary, the guide wire 30 can be integrally pushed into the narrowed portion together with the balloon catheter 40 and the balloon catheter support device 10. As described above, the axis of the guide wire 30 is maintained in a state of being substantially aligned with the axis of the catheter tip portion 75 by the balloon catheter support device 10.
  • the transmission efficiency of the force in the axial direction of the guide wire 30 is high, and even if the guide wire 30 is abutted against the narrowed portion, the guide wire 30 is seated in the distal tubular portion 17 and in the guide wire lumen 54. Hard to yield. Therefore, the balloon catheter 40, the balloon catheter support device 10, and the guide wire 30 can be integrally and effectively pushed into the narrowed portion. As described above, the balloon catheter 40 covered with the balloon catheter support device 10 can also function as a support catheter having high pushability and penetrability in the narrowed portion.
  • the surgeon injects a predetermined amount of dilation fluid from the first hub opening 61 using an indeflator, a syringe, or the like, and expands the inside of the balloon 70 through the dilation lumen 53. Send fluid.
  • the balloon 70 is expanded, and the narrowed portion is expanded by the balloon 70.
  • a drug-coated balloon (DCB) having a drug layer 71 provided on the outer surface of the balloon 70 is used, the drug layer 71 provided on the outer surface of the balloon 70 comes into contact with the narrowed portion, and the drug is applied to the narrowed portion. Will be done.
  • DCB drug-coated balloon
  • the balloon 70 may be expanded in a state where the proximal end side tubular portion 16 is covered with the catheter tip portion 75 (see FIG. 10B), but the proximal end side tubular portion 16 is placed on the catheter tip portion 75. May be performed in a state of being moved to the tip side (see FIG. 10 (A)).
  • the expansion fluid is sucked and discharged from the first hub opening 61, and the balloon 70 is contracted.
  • the balloon catheter 40, the balloon catheter support device 10 and the guide wire 30 are removed from the blood vessel via the introducer, and the procedure is completed.
  • the balloon catheter support device 10 is the balloon catheter support device 10 for supporting the balloon catheter 40, and includes a tubular portion 14 formed by winding a wire rod 11 and forming a tubular portion 14. It has a linear portion 15 formed of the same wire rod 11 as the wire rod 11 and extending from the proximal end portion of the tubular portion 14 toward the proximal end, and the tubular portion 14 has a proximal end arranged on the proximal end side. It has a side tubular portion 16 and a distal tubular portion 17 arranged on the distal end side of the proximal tubular portion 16, and the winding radius of the distal tubular portion 17 is the winding of the proximal tubular portion 16.
  • the wire rod 11 may have the same outer diameter from the tip end to the base end, or the outer diameter may be reduced only by the tip tubular portion 16. Further, the outer diameters of the distal tubular portion 17 and the proximal tubular portion 16 may be smaller than the outer diameter of the separated portion 19 or the elongated portion 20.
  • the distal end portion of the balloon catheter 40 is surrounded by the proximal end side tubular portion 16, the distal end side tubular portion 17 penetrates the balloon catheter 40, and the distal end side of the balloon catheter 40.
  • a linear portion 15 can be extended along the balloon catheter 40 toward the proximal end side so as to surround the guide wire 30 projecting to.
  • the balloon catheter support device 10 can improve the pushability of the balloon catheter 40. Further, since the clearance between the balloon catheter 40 and the lumen 54 such as the guide wire lumen 54 remains large, the guide wire 30 passing through the lumen of the balloon catheter 40 becomes difficult to move (for example, stacks) in the lumen of the balloon catheter 40. This can be suppressed, push loss can be reduced, and the pushability of the balloon catheter 40 in the living lumen can be improved. Further, since the tubular portion 14 is formed of the wound wire rod 11 to maintain a certain degree of flexibility, it is possible to suppress a decrease in the passability of the balloon catheter 40 in the meandering biological lumen.
  • the distal end side tubular portion 17 and the proximal end side tubular portion 16 have the same axial center and are lined up.
  • the axial center of the tip of the balloon catheter 40 surrounded by the proximal tubular portion 16 and the axial center of the guide wire 30 surrounded by the proximal tubular portion 16 are likely to coincide with each other. Therefore, since the balloon catheter 40 and the balloon catheter support device 10 can easily move straight along the guide wire 30, the pushing force can be efficiently applied to the pushing target. Therefore, the balloon catheter support device 10 can improve the pushability of the balloon catheter 40. Further, it is possible to effectively suppress that the guide wire 30 becomes difficult to move (for example, stack) due to the guide wire lumen 54 of the balloon catheter 40, reduce the push loss, and improve the pushability of the balloon catheter 40 in the biological lumen. Can be improved.
  • the tubular portion 14 is tightly wound.
  • the tubular portion 14 is formed of the wound wire rod 11 and has a certain degree of flexibility, but the flexural rigidity can be improved by tight winding. Therefore, it is possible to improve the pushability while suppressing the decrease in the passability of the balloon catheter 40 in the meandering biological lumen.
  • the tubular portion 14 may be loosely wound. As a result, the tubular portion 14 has improved flexibility. Therefore, it is possible to suppress a decrease in passability of the balloon catheter 40 in the meandering biological lumen.
  • the tubular portion 14 is elastically deformable. As a result, the tubular portion 14 maintains its flexibility, so that it is possible to suppress a decrease in passability of the balloon catheter 40 in the meandering biological lumen. Further, since the tubular portion 14 can be restored to its original shape by elastic force even if it is deformed, the pushability of the balloon catheter 40 in the biological lumen can be improved. Since the tubular portion 14 is shaped so that the wire rod 11 is tightly wound, the tubular portion 14 is elastically bent by an external force and then released from the external force to ensure the original tightly wound shape. You can go back to.
  • the linear portion 15 has a separating portion 19 at a position close to the tubular portion 14 and separated from the axial center of the tubular portion 14 in a direction perpendicular to the axial center. As a result, the linear portion 15 can extend toward the proximal end side of the balloon 70 without being hindered by the balloon 70 protruding outward in the radial direction of the balloon catheter 40.
  • the tubular portion 14 is added to surround the expansion portion 74 of the balloon 70 on the proximal end side of the proximal end side tubular portion 16 surrounding the non-expandable balloon tip portion 75. It may have a tubular portion 21.
  • the inner diameter of the additional tubular portion 21 tapers toward, for example, the proximal end side according to the shape of the balloon 70.
  • the inner diameter of the additional tubular portion 21 may be constant. Alternatively, the inner diameter of the additional tubular portion 21 may become constant after increasing toward the proximal end side.
  • the balloon catheter support device 10 can impart rigidity to the balloon 70 and enhance the pushability of the balloon 70.
  • the additional tubular portion 21 may be loosely wound or tightly wound. If the additional tubular portion 21 is loosely wound, the additional tubular portion 21 can be easily expanded by the balloon 70 when the balloon 70 is expanded. Further, if the additional tubular portion 21 is tightly wound, it can impart high rigidity to the balloon 70 and enhance the pushability.
  • the wire rod 11 forming the additional tubular portion 21 slides on the surface of the balloon 70. As a result, the additional tubular portion 21 is forcibly expanded outward in the radial direction.
  • the linear portion 15 of the balloon catheter support device 10 may be arranged so as to be surrounded by one of a plurality of blade portions 76 formed and folded on the balloon 70. As a result, the linear portion 15 can be compactly accommodated, and an increase in the outer diameter of the balloon catheter 40 can be suppressed.
  • Balloon protector 11 Wire 12 1st opening 13 2nd opening 14 Cover 15 Linear 16 Connection 17 Support 20 Convex 40 Balloon catheter 50 Shaft 51 Outer tube 52 Inner tube 53 Expansion lumen 54 Guide wire lumen 70 Balloon 71 Drug layer 72 Blade ⁇ Balloon catheter support device> 10 Balloon catheter support device 11 Wire rod 12 First opening 13 Second opening 14 Tubular part 15 Linear part 16 Base end side tubular part 17 Tip side tubular part 18 Step 19 Separation part 20 Long part 21 Additional tubular part 30 Guide wire 40 Balloon catheter 54 Guide wire lumen 70 Balloon 75 Catheter tip

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

La présente invention concerne un protecteur de ballonnet qui est apte à empêcher la manifestation d'une tendance à la courbure d'un ballonnet de façon à faciliter le placement du ballonnet au centre d'une lumière dans un corps vivant, et qui est apte à empêcher une diminution de la pénétrabilité et de l'aptitude à l'insertion du ballonnet dans la lumière du corps vivant.　L'invention concerne un protecteur de ballonnet (10) qui est destiné à protéger un ballonnet (70) d'un cathéter à ballonnet (40) et qui comporte : une partie enveloppe (14) qui est formée par enroulement d'un fil (11) de manière à lui donner une forme tubulaire ayant une première ouverture (12) et une seconde ouverture (13) ; et une partie linéaire (15) qui est formée à partir du même fil (11) que le fil (11) et qui part de la première ouverture (12) de la partie enveloppe (14) et fait saillie vers la seconde ouverture (13).
PCT/JP2021/010033 2020-03-24 2021-03-12 Protecteur de ballonnet et dispositif support de cathéter à ballonnet WO2021193140A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2020-051986 2020-03-24
JP2020-051985 2020-03-24
JP2020051985A JP2021146135A (ja) 2020-03-24 2020-03-24 バルーン保護具
JP2020051986A JP2021146136A (ja) 2020-03-24 2020-03-24 バルーンカテーテル支持デバイス

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05208050A (ja) * 1992-01-31 1993-08-20 Kanegafuchi Chem Ind Co Ltd 拡張カテーテル用バルーン外径調節具、それを具備した拡張カテーテル及びその拡張カテーテルの使用方法
US5344426A (en) * 1990-04-25 1994-09-06 Advanced Cardiovascular Systems, Inc. Method and system for stent delivery
JP2013223663A (ja) * 2012-04-23 2013-10-31 Terumo Corp バルーンカテーテル用保護スリーブ、バルーンカテーテルシステムおよびステントデリバリーシステム
CN104971422A (zh) * 2015-07-16 2015-10-14 颜玉强 药物球囊导管及其制备方法
JP2018050729A (ja) * 2016-09-27 2018-04-05 テルモ株式会社 保護シース
JP2018157914A (ja) * 2017-03-22 2018-10-11 テルモ株式会社 スコアリングデバイスおよびスコアリングデバイスの操作方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5344426A (en) * 1990-04-25 1994-09-06 Advanced Cardiovascular Systems, Inc. Method and system for stent delivery
JPH05208050A (ja) * 1992-01-31 1993-08-20 Kanegafuchi Chem Ind Co Ltd 拡張カテーテル用バルーン外径調節具、それを具備した拡張カテーテル及びその拡張カテーテルの使用方法
JP2013223663A (ja) * 2012-04-23 2013-10-31 Terumo Corp バルーンカテーテル用保護スリーブ、バルーンカテーテルシステムおよびステントデリバリーシステム
CN104971422A (zh) * 2015-07-16 2015-10-14 颜玉强 药物球囊导管及其制备方法
JP2018050729A (ja) * 2016-09-27 2018-04-05 テルモ株式会社 保護シース
JP2018157914A (ja) * 2017-03-22 2018-10-11 テルモ株式会社 スコアリングデバイスおよびスコアリングデバイスの操作方法

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