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WO2014155489A1 - Cathéter d'aspiration de matière étrangère intravasculaire - Google Patents

Cathéter d'aspiration de matière étrangère intravasculaire Download PDF

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Publication number
WO2014155489A1
WO2014155489A1 PCT/JP2013/058575 JP2013058575W WO2014155489A1 WO 2014155489 A1 WO2014155489 A1 WO 2014155489A1 JP 2013058575 W JP2013058575 W JP 2013058575W WO 2014155489 A1 WO2014155489 A1 WO 2014155489A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide wire
tube
wire lumen
foreign matter
catheter
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2013/058575
Other languages
English (en)
Japanese (ja)
Inventor
晋 日下部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terumo Clinical Supply Co Ltd
Original Assignee
Terumo Clinical Supply Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Terumo Clinical Supply Co Ltd filed Critical Terumo Clinical Supply Co Ltd
Priority to PCT/JP2013/058575 priority Critical patent/WO2014155489A1/fr
Publication of WO2014155489A1 publication Critical patent/WO2014155489A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/0054—Catheters; Hollow probes characterised by structural features with regions for increasing flexibility
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
    • 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
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/008—Strength or flexibility characteristics of the catheter tip
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/32—Surgical cutting instruments
    • A61B17/3205—Excision instruments
    • A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22038—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for with a guide wire
    • A61B2017/22039—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for with a guide wire eccentric
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22079—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for with suction of debris
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22082—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for after introduction of a substance
    • A61B2017/22084—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for after introduction of a substance stone- or thrombus-dissolving
    • 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
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/008—Strength or flexibility characteristics of the catheter tip
    • A61M2025/0081—Soft tip
    • 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
    • A61M2025/0183—Rapid exchange or monorail 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
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids

Definitions

  • the present invention relates to an intravascular foreign matter suction catheter for sucking foreign matters such as stenosis-causing substances in blood vessels.
  • a suction catheter having a suction lumen formed in a long shaft is used.
  • the suction catheter has a guide wire lumen through which the guide wire is inserted, and is inserted to the target site while being guided by the guide wire. Then, foreign matter is sucked and removed from the suction port at the distal end to the suction lumen by the negative pressure applied by the suction means attached to the base end portion.
  • a suction catheter for example, JP 2010-57831 A (Patent Document 1), JP 2006-297063 A (Patent Document 2), JP 2012-35059 A (US201116344: Patent Document 3).
  • the suction catheter of Patent Document 1 has a suction lumen that communicates from a distal portion to a proximal portion, and a guide wire lumen in the distal portion.
  • the shaft tube (2) is formed of three types of tubes having different hardnesses in the proximal portion (3), the intermediate portion (4), and the distal portion (5).
  • a reinforcing material (7) is attached to the inner wall surface of the part (3) so as not to come into contact with the liquid.
  • a guide wire tube (6) is attached to the distal portion (5).
  • the proximal part (3) and the intermediate part (4) have a suction lumen (11).
  • the distal portion (5) has a guide wire lumen (10) and a suction lumen (11).
  • the distal portion (5) is formed of a soft tube having a hardness D2 of 40 to 75.
  • the suction catheter 10 of Patent Document 3 is joined in parallel to the suction tube 24 formed with the suction lumen 24a communicating from the distal end to the proximal end, and the outer surface on the distal end side of the suction tube 24, and the suction tube And a guide wire tube 20 in which a guide wire lumen 20a having an opening 22 is formed outside.
  • the suction tube 24 has a flat portion 40 whose outer surface is substantially parallel to the direction of the axis O1 of the suction lumen 24a, and the opening 22 of the guide wire lumen 20a is the flat portion 40 of the suction tube 24. Is located.
  • An object of the present invention is to provide a blood vessel that does not have a drop in guide wire insertion and operability, has a flexible tip, and can be easily inserted into a target site in the blood vessel without damaging the inner wall of the blood vessel.
  • the present invention provides a catheter for sucking internal foreign matter.
  • the intravascular foreign matter suction catheter that achieves the above object is as follows.
  • An intravascular foreign matter suction catheter comprising a main lumen communicating from the distal end to the proximal end, and a guide wire lumen holding portion provided at the distal end, wherein the intravascular foreign matter suction catheter is the guide wire lumen holding portion
  • the easily deformable portion is provided on the side surface between the front end and the rear end of the guide wire lumen holding portion, does not hinder the insertion of the guide wire, and the guide wire lumen holding portion.
  • An intravascular foreign matter suction catheter formed by a communicating portion that communicates the guide wire lumen with the outside.
  • FIG. 1 is a front view of an intravascular foreign matter suction catheter according to an embodiment of the present invention.
  • 2 is an enlarged front view of the distal end portion of the intravascular foreign matter suction catheter shown in FIG.
  • FIG. 3 is an enlarged plan view of a distal end portion of the intravascular foreign matter suction catheter shown in FIG. 4 is an enlarged cross-sectional view taken along line AA in FIG.
  • FIG. 5 is an enlarged sectional view taken along line BB in FIG.
  • FIG. 6 is an enlarged cross-sectional view of the rear end portion of the intravascular foreign matter suction catheter shown in FIG.
  • FIG. 7 is an enlarged cross-sectional view of the distal end portion of the intravascular foreign matter suction catheter shown in FIG. FIG.
  • FIG. 8 is an enlarged cross-sectional view of the distal end portion of the intravascular foreign matter suction catheter according to another embodiment of the present invention.
  • FIG. 9 is an enlarged cross-sectional view of the distal end portion of a catheter for sucking intravascular foreign matter according to another embodiment of the present invention.
  • FIG. 10 is an explanatory diagram for explaining a communicating portion of the intravascular foreign matter suction catheter according to the present invention.
  • the intravascular foreign matter suction catheter 1 of the present invention includes a main lumen 20 communicating from the distal end to the proximal end, and a guide wire lumen holding portion 3 provided at the distal end.
  • the intravascular foreign matter suction catheter 1 includes an easily deformable portion 10 provided in the guide wire lumen holding portion 3, and the easily deformable portion 10 is provided on the side surface between the front end and the rear end of the guide wire lumen holding portion 3.
  • the guide wire lumen 30 is formed by a communication portion 33 that does not obstruct the insertion of the guide wire and communicates the guide wire lumen 30 of the guide wire lumen holding portion 3 with the outside.
  • An intravascular foreign matter suction catheter 1 includes a catheter tube 2 having a main lumen 20 and a small side tube 31 having a guide wire lumen 30.
  • the side tube 31 is fixed to the side surface of the distal end portion of the catheter tube 2 and forms a guide wire lumen holding portion 3.
  • the catheter tube 2 and the side tube 31 do not communicate with each other, and are adjacent and independent.
  • the tip of the catheter tube 2 is provided with a tip member 22 having a suction port that opens obliquely toward the tip.
  • the tip of the side tube 31 protrudes slightly from the tip of the tip member 22, and an X-ray opaque marker (contrast marker) 32 is fixed to the protruding portion.
  • the radiopaque marker 32 is provided on the outer peripheral surface of the side tube 31 and is made of a material having radiopacity made of gold, platinum, or the like. Thereby, the tip position of the catheter 1 in the living body can be visually confirmed by X-ray contrast.
  • the radiopaque marker 32 may not be exposed on the outer peripheral surface and may be embedded in the side tube 31.
  • the catheter tube 2 includes a main body tube 21 and a plurality of joining tubes positioned between the main body tube 21 and the tip member 22.
  • a first connection tube 23 joined to the rear end of the tip member 22, and a second connection for connecting the rear end of the first connection tube 23 and the front end of the main body tube 21.
  • a connecting tube 24 a connecting tube 24.
  • the first connection tube 23 and the second connection tube 24 are more flexible than the main body tube 21 and higher in rigidity than the tip member 22.
  • the first connection tube 23 is more flexible than the second connection tube 24.
  • the main body tube 21 includes a rigidity imparting body 28.
  • the rigidity imparting body 28 is preferably a mesh, spiral, or a plurality of linearly arranged linear bodies made of metal wires.
  • the rigidity imparting body 28 is buried in the outer surface or the thickness of the resin forming the main body tube 21.
  • a metal wire is suitable.
  • a stainless steel wire or an amorphous alloy wire is preferable.
  • An amorphous alloy wire formed using a boron alloy, iron-cobalt-chromium-molybdenum-silicon-boron alloy, or the like can be preferably used.
  • the amorphous alloy wire has an amorphous structure formed by extruding the metal as described above into a linear shape and rapidly cooling, and the formed amorphous alloy wire is a diamond having an appropriate inner diameter. The diameter is reduced by passing through a die.
  • Amorphous alloy wires have high tensile strength, a wide elastic deformation region, and are excellent in heat resistance, corrosion resistance, and fatigue resistance.
  • the amorphous alloy wire has a wire diameter of 5 to 30 ⁇ m, more preferably 10 to 20 ⁇ m.
  • As the stainless steel wire a wire diameter of 20 to 80 ⁇ m, more preferably 30 to 70 ⁇ m, particularly 40 to 50 ⁇ m is suitable.
  • a plurality of metal wires (for example, amorphous alloy wires and stainless steel wires) having a wire diameter of 1 to 10 ⁇ m, more preferably 2 to 5 ⁇ m are twisted, for example, 3 to 7, and one linear body of 10 to 20 ⁇ m. 11 may be used.
  • the catheter tube 2 of this Example has the inner layer tube 25 extended from the front-end
  • the main body tube 21, the chip member 22, the first connection tube 23, and the second connection tube 24 cover the outer surface of the inner layer tube 25.
  • the catheter tube 2 has an outer diameter of 1.1 mm to 4.0 mm, preferably 1.2 mm to 3.0 mm, a wall thickness of 20 ⁇ m to 500 ⁇ m, preferably 100 ⁇ m to 400 ⁇ m, and a length of 500 mm to 2000 mm.
  • the thickness is preferably 1200 mm to 1600 mm.
  • the side tube 31 can insert a guide wire into the guide wire lumen 30 from the distal end opening thereof, and can be led out from the proximal end opening portion 34. Further, the side tube 31 extends from the distal end of the tip member 22 of the catheter tube 2 beyond the joint portion of the main tube 21 and the tip member 22 to the proximal end side of the main tube of a predetermined length. In particular, in the illustrated embodiment, the side tube 31 extends from the distal end of the tip member 22 of the catheter tube 2 and reaches the outer surface of the distal end portion of the main body tube 21.
  • the side tube 31 has an outer diameter of 0.4 mm to 1.2 mm, preferably 0.6 mm to 1.0 mm, a wall thickness of 10 ⁇ m to 400 ⁇ m, preferably 100 ⁇ m to 250 ⁇ m, a length of 10 mm to 350 mm, Preferably, it is 25 mm to 250 mm.
  • the catheter 1 of this embodiment has an easily deformable portion 10 formed at a portion to be the distal end portion of the guide wire lumen holding portion 3.
  • the tip side portion of the portion where the side tube 31 is provided is an easily deformable portion.
  • the easily deformable portion is formed by a gap 33 between two opposed guidewire lumen openings provided between the front end and the rear end of the guidewire lumen holding portion 3.
  • a plurality of gaps 33 are provided.
  • Such a communication part (gap part) 33 is formed by partially removing the side part of the side tube 31 and providing a slit for communicating the guide wire lumen 30 with the outside.
  • the communication portion (gap portion) 33 may be formed by arranging a plurality of short tubes so as to be slightly separated from each other in the axial direction.
  • the communication portion (gap portion) 33 of the side tube 31 that forms the easily deformable portion 10 is a joint portion of the tip member 22 in the catheter tube 2 (in this embodiment, after the tip member 22). It is located on the junction part of the edge and the front-end
  • a plurality of communication portions (gap portions) 33 are provided in the axial direction of the guide wire lumen holding portion 3, specifically, three. By providing a plurality in this way, the deformation in the easily deformable portion 10 becomes favorable.
  • the number is preferably 2 to 5. Further, the axial distance (axial width) of the communication portion (gap portion) 33 is preferably 10 to 50 mm.
  • the axial distance between adjacent communicating portions (void portions) 33 is preferably 1 to 5 mm. As shown in FIGS. 2 and 4, in the catheter 1 of this embodiment, the communication portion (gap portion) 33 does not completely divide the side tube 31. By doing so, the lower surface of the guide wire lumen 30 is continuous in a semi-cylindrical shape, and the deterioration of the guide wire insertion property is small.
  • an angle R (see FIG. 10) of the opening part of the communication part (gap part) 33 with respect to the center of the side tube 31 is 90 ⁇ . It is preferably 270 degrees. In addition, in what is shown in FIG. 4, the angle with respect to the center of the side tube 31 of an opening part is about 180 degree
  • the catheter 1a for intravascular foreign matter suction shown in FIG. 8 may be provided.
  • the intravascular foreign matter suction catheter 1a of this embodiment includes a guide wire lumen holding portion 3a.
  • the side tube 31 can insert a guide wire into the guide wire lumen 30 from the distal end opening thereof, and can be led out from the proximal end opening portion 34 to the outside. Further, the side tube 31 reaches the outer surface of the distal end portion of the main body tube 21 from the distal end of the tip member 22 of the catheter tube 2 beyond the joint portion of the main tube 21 and the tip member 22.
  • the entire guide wire lumen holding portion 3a is an easily deformable portion.
  • the easily deformable portion is formed by a communication portion (slit) 35 provided over the entire guide wire lumen holding portion 3a.
  • Many communicating portions (slits) 35 are provided substantially in parallel in the axial direction of the guide wire lumen holding portion 3a.
  • the axial pitch of the communication portions (slits) 35 is preferably 5 to 10 mm.
  • the width of the communication portion (slit) 35 is preferably 0 to 5 mm.
  • the pitch of the communication portions (slits 35) is not limited to a constant pitch.
  • the pitch of the communication portions (slits) 35 at the tip of the side tube 31 may be short.
  • the pitch of the communication portions (slits) 35 may be such that the front end portion of the side tube is short and becomes longer gradually or stepwise toward the rear end portion.
  • the lower surface of the guide wire lumen 30 is continuous in a semi-cylindrical shape, and the deterioration of the guide wire insertion property is small.
  • the angle of the opening portion of the communication portion (slit) 35 with respect to the center of the side tube 31 is preferably 90 to 270 degrees.
  • the catheter 1b for intravascular foreign matter suction shown in FIG. 9 may be provided.
  • the intravascular foreign matter suction catheter 1b of this embodiment includes a guide wire lumen holding portion 3b.
  • the side tube 31 can insert a guide wire into the guide wire lumen 30 from the distal end opening thereof, and can be led out from the proximal end opening portion 34 to the outside. Further, the side tube 31 reaches the outer surface of the distal end portion of the main body tube 21 from the distal end of the tip member 22 of the catheter tube 2 beyond the joint portion of the main tube 21 and the tip member 22. As shown in FIG.
  • the entire guide wire lumen holding portion 3b is an easily deformable portion.
  • the easily deformable portion is formed by a communicating portion (spiral slit) 36 provided over the entire guide wire lumen holding portion 3b.
  • the communication part (spiral slit) 36 is provided over the entire length of the guide wire lumen holding part 3b (side tube 31).
  • the axial pitch of the communication portions (spiral slits) 36 is preferably 5 to 10 mm.
  • the width of the communication part (spiral slit) 36 is preferably 0 to 5 mm.
  • the pitch of the communication portions (spiral slit 36) is not limited to a constant pitch.
  • the pitch of the communication portions (spiral slits) 36 at the distal end portion of the side tube 31 may be short.
  • the pitch of the communication portions (spiral slits) 36 may be such that the front end portion of the side tube is short and becomes longer gradually or stepwise toward the rear end portion.
  • the forming material of the catheter tube 2 (specifically, the forming material of the main body tube, the tip member, the first and second connection tubes) flows into the bottom portion of the communication portion (spiral slit) 36,
  • the spiral slit may partially disappear.
  • the lower surface of the guide wire lumen 30 is substantially continuous in a semi-cylindrical shape, and there is little decrease in the insertion property of the guide wire.
  • the angle of the remaining portion of the communication portion (spiral slit) 36 with respect to the center of the side tube 31 is 90 to 270 degrees. preferable.
  • the hub 4 has a shape and a structure as shown in FIGS. Specifically, the hub 4 includes a cylindrical main body 41 having an internal passage 40 therethrough, and a cylindrical front end 43 provided at the distal end of the main body 41 and pushed into the rear end 29 of the catheter tube 2.
  • the two wing portions 42 extending outward from the side portions of the main body portion 41 and the connection portion 44 provided at the rear end of the main body 41 portion are provided.
  • a suction means such as a syringe can be attached to the connection portion 44.
  • a kink prevention tube 5 provided so as to cover the rear end portion of the catheter tube 2 is provided.
  • the kink prevention tube 5 extends in the distal direction beyond the distal end of the distal end portion 43 of the hub 4, the rear portion 51 covering the rear end of the catheter tube 2 where the distal end portion 43 of the hub 4 is inserted, and A tapered portion 52 that is reduced in diameter is provided. By providing such a tube 5, catheter kinking at the tip of the hub 4 is prevented.
  • the catheter tube 2 is preferably a two-layer tube having, for example, an outer layer of a flexible thermoplastic resin and an inner layer 25 of a material having a certain degree of complementarity.
  • the tip member 22, the first and second connection tubes 23 and 24, and the main body tube 21 are formed of a material that is compatible with the outer layer of the side tube 31.
  • the synthetic resin used for the catheter tube 2 (the tip member 22, the first and second connection tubes 23 and 24 are the main body tube 21) and the side tube 31 include polyolefin (for example, polyethylene, polypropylene), polyolefin elastomer, and the like.
  • thermoplastic resins such as polyvinyl chloride, ethylene-vinyl acetate copolymers, polyamide elastomers, polyurethane, fluororesins, silicone rubber Etc., preferably polyethylene, polyamide elastomer or polyurethane.
  • the catheter tube 2 and the side tube are flexible to the extent that they do not hinder the bending of the guide wire.
  • the above-described flexible resin or hard resin may be used as the catheter tube forming material.
  • the hard synthetic resin fluororesins such as PTFE and ETFE, polyimide, polyester (for example, polyethylene terephthalate, polybutylene terephthalate), polyolefin (for example, polyethylene, polypropylene), polyamide, polyimide, and the like are used.
  • the catheter tube 2 includes a distal end portion and a recess extending in the axial direction, and a side tube 31 is fused to the recess.
  • the catheter tube 2 includes an axial protrusion 26 that protrudes into the main lumen that forms the recess.
  • the inner wall of the catheter tube 2 including the inner layer 25 protrudes inward from the portion having the concave portion of the catheter tube 2. For this reason, the part which has the recessed part of the catheter tube 2 becomes a deformation
  • the distal end 27 of the catheter tube 2 is an inclined opening having a distal end on the site tube 31 side. Further, the base end opening 34 of the side tube 31 is also an inclined opening.
  • the intravascular foreign matter suction catheter of the present invention is as follows. (1) An intravascular foreign matter suction catheter comprising a main lumen communicating from the distal end to the proximal end and a guide wire lumen holding portion provided at the distal end portion, wherein the intravascular foreign matter suction catheter is the guide wire An easily deformable portion provided in the lumen holding portion, and the easily deformable portion is provided on a side surface between a front end and a rear end of the guide wire lumen holding portion and does not obstruct insertion of the guide wire, and the guide wire An intravascular foreign matter suction catheter formed by a communicating portion that communicates the guide wire lumen of the lumen holding portion with the outside.
  • this intravascular foreign matter suction catheter by having the easily deformable portion provided in the guide wire lumen holding portion, it is possible to improve the deformability of the distal end portion of the catheter which is easily hardened by the attachment of the guide wire lumen holding portion. As a result, there is no decrease in the insertion and operability of the guide wire, the tip is flexible, and the insertion into the target site in the blood vessel is facilitated without damaging the blood vessel inner wall.
  • the following embodiments of the intravascular foreign matter suction catheter may be used.
  • the communication portion forming the easily deformable portion is formed by a gap between two guide wire lumen openings facing each other provided between a front end and a rear end of the guide wire lumen holding portion.
  • the communication portion forming the easily deformable portion communicates the guide wire lumen and the outside, and extends in the circumferential direction or the axially oblique direction of the guide wire lumen.
  • the catheter for intravascular foreign matter suction according to any one of 3).
  • the intravascular foreign matter suction catheter according to any one of (1) to (4), wherein a plurality of communicating portions forming the easily deformable portion are provided in the axial direction of the guide wire lumen holding portion.
  • the intravascular foreign matter suction catheter includes a catheter tube having the main lumen and a small-diameter side tube having the guide wire lumen, and the side tube is disposed on a side surface of a distal end portion of the catheter tube.
  • the catheter tube includes a main tube and a tip member provided at a distal end portion of the main tube and having a suction port, and the side tube extends from the distal end of the tip member to the main tube. And a connecting portion between the main tube and the tip member.
  • the communicating portion that forms the easily deformable portion extends beyond the joint portion between the main tube and the tip member.

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Abstract

La présente invention concerne un cathéter d'aspiration de matière étrangère intravasculaire (1) qui est doté d'une lumière principale (20) communiquant entre une extrémité distale et une extrémité proximale, et d'une partie de maintenance de lumière de fil-guide (3) fournie à une partie d'extrémité distale. Le cathéter d'aspiration de matière étrangère intravasculaire (1) est doté d'une partie facilement déformable (10) fournie sur la partie de maintenance de lumière de fil-guide (3), et la partie facilement déformable (10) est fournie sur une surface latérale entre une extrémité distale et une extrémité arrière de la partie de maintenance de lumière de fil-guide (3), n'empêche pas l'insertion d'un fil-guide, et est formée par une partie de communication (33) pour faire communiquer une lumière de fil-guide (30) de la partie de maintenance de lumière de fil-guide (3) avec l'extérieur.
PCT/JP2013/058575 2013-03-25 2013-03-25 Cathéter d'aspiration de matière étrangère intravasculaire Ceased WO2014155489A1 (fr)

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PCT/JP2013/058575 WO2014155489A1 (fr) 2013-03-25 2013-03-25 Cathéter d'aspiration de matière étrangère intravasculaire

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021106716A1 (fr) * 2019-11-25 2021-06-03 ニプロ株式会社 Dispositif de commutation de trajet d'écoulement
WO2025028185A1 (fr) * 2023-08-01 2025-02-06 株式会社カネカ Cathéter

Citations (8)

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JPH0584306A (ja) * 1991-09-26 1993-04-06 Sumitomo Bakelite Co Ltd 医療用誘導チユーブ
US5267958A (en) * 1992-03-30 1993-12-07 Medtronic, Inc. Exchange catheter having exterior guide wire loops
US6056722A (en) * 1997-09-18 2000-05-02 Iowa-India Investments Company Limited Of Douglas Delivery mechanism for balloons, drugs, stents and other physical/mechanical agents and methods of use
JP2002272675A (ja) * 2001-03-16 2002-09-24 Olympus Optical Co Ltd カテーテル
JP2004351005A (ja) * 2003-05-29 2004-12-16 Japan Science & Technology Agency 屈曲チューブとその製造方法
WO2006043582A1 (fr) * 2004-10-22 2006-04-27 Kaneka Corporation Catheter pour traitement medical
WO2008123521A1 (fr) * 2007-04-03 2008-10-16 Nipro Corporation Cathéter d'aspiration d'un thrombus
JP2013031523A (ja) * 2011-08-01 2013-02-14 Goodman Co Ltd 吸引カテーテル

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0584306A (ja) * 1991-09-26 1993-04-06 Sumitomo Bakelite Co Ltd 医療用誘導チユーブ
US5267958A (en) * 1992-03-30 1993-12-07 Medtronic, Inc. Exchange catheter having exterior guide wire loops
US6056722A (en) * 1997-09-18 2000-05-02 Iowa-India Investments Company Limited Of Douglas Delivery mechanism for balloons, drugs, stents and other physical/mechanical agents and methods of use
JP2002272675A (ja) * 2001-03-16 2002-09-24 Olympus Optical Co Ltd カテーテル
JP2004351005A (ja) * 2003-05-29 2004-12-16 Japan Science & Technology Agency 屈曲チューブとその製造方法
WO2006043582A1 (fr) * 2004-10-22 2006-04-27 Kaneka Corporation Catheter pour traitement medical
WO2008123521A1 (fr) * 2007-04-03 2008-10-16 Nipro Corporation Cathéter d'aspiration d'un thrombus
JP2013031523A (ja) * 2011-08-01 2013-02-14 Goodman Co Ltd 吸引カテーテル

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021106716A1 (fr) * 2019-11-25 2021-06-03 ニプロ株式会社 Dispositif de commutation de trajet d'écoulement
JP7666329B2 (ja) 2019-11-25 2025-04-22 ニプロ株式会社 流路切り換え装置
WO2025028185A1 (fr) * 2023-08-01 2025-02-06 株式会社カネカ Cathéter

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