WO2014155489A1 - Intravascular foreign matter suctioning catheter - Google Patents

Intravascular foreign matter suctioning catheter 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
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WO
WIPO (PCT)
Prior art keywords
guide wire
tube
wire lumen
foreign matter
catheter
Prior art date
Application number
PCT/JP2013/058575
Other languages
French (fr)
Japanese (ja)
Inventor
晋 日下部
Original Assignee
テルモ・クリニカルサプライ株式会社
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
Application filed by テルモ・クリニカルサプライ株式会社 filed Critical テルモ・クリニカルサプライ株式会社
Priority to PCT/JP2013/058575 priority Critical patent/WO2014155489A1/en
Publication of WO2014155489A1 publication Critical patent/WO2014155489A1/en

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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, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus 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, e.g. tourniquets
    • 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, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22038—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus 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 the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus 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, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22079—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus 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, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22082—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus 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 the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus 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.

Abstract

An intravascular foreign matter suctioning catheter (1) is provided with a main lumen (20) communicated from a distal end to a proximal end, and a guide wire lumen maintenance part (3) provided to a distal-end part. The intravascular foreign matter suctioning catheter (1) is provided with an easily deformed part (10) provided to the guide wire lumen maintenance part (3), and the easily deformed part (10) is provided to a lateral surface between a distal end and a rear end of the guide wire lumen maintenance part (3), does not impede insertion of a guide wire, and is formed by a communicating part (33) for communicating a guide wire lumen (30) of the guide wire lumen maintenance part (3) with the outside.

Description

血管内異物吸引用カテーテルIntravascular foreign substance suction catheter
　本発明は、血管内の狭窄原因物質等の異物を吸引するための血管内異物吸引用カテーテルに関する。 The present invention relates to an intravascular foreign matter suction catheter for sucking foreign matters such as stenosis-causing substances in blood vessels.
　血管内壁面に形成された狭窄原因物質（例えば、血栓）等の異物を除去するために、長尺なシャフト内に吸引ルーメンが形成された吸引カテーテルが用いられている。 In order to remove foreign substances such as stenosis-causing substances (for example, thrombus) formed on the inner wall surface of a blood vessel, a suction catheter having a suction lumen formed in a long shaft is used.
　吸引カテーテルは、ガイドワイヤが挿通されるガイドワイヤルーメンを有し、ガイドワイヤに案内されながら目的部位まで挿入される。そして、基端部に装着される吸引手段により付与される陰圧により、先端の吸引口から吸引ルーメンにと異物を吸引し、除去する。
　このような、吸引カテーテルとして、例えば、特開２０１０－５７８３１号公報（特許文献１）、特開２００６－２９７０６３号公報（特許文献２）、特開２０１２－３５０５９号公報（ＵＳ２０１２０１６３４４：特許文献３）のものがある。
　特許文献１の吸引カテーテルは、遠位部から近位部まで連通する吸引ルーメンと、遠位部にガイドワイヤルーメンを有する。そして、ガイドワイヤルーメンの近位端が吸引ルーメンに対し連通している。
　また、特許文献２の吸引カテーテルでは、シャフトチューブ（２）が、近位部（３）と中間部（４）と遠位部（５）の硬度の異なる三種類のチューブから形成され、近位部（３）の内壁面には、接液しないように補強材（７）が装着されている。そして、遠位部（５）には、ガイドワイヤチューブ（６）が装着されている。近位部（３）と中間部（４）は、吸引ルーメン（１１）を有する。遠位部（５）は、ガイドワイヤルーメン（１０）と吸引ルーメン（１１）を有する。そして、中間部（４）の硬度Ｄ１を１００とすると遠位部（５）の硬度Ｄ２が４０から７５の柔らかいチューブで形成されている。 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.
As such 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). There are things.
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 proximal end of the guide wire lumen communicates with the suction lumen.
Further, in the suction catheter of Patent Document 2, 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). When the hardness D1 of the intermediate portion (4) is 100, the distal portion (5) is formed of a soft tube having a hardness D2 of 40 to 75.
　また、特許文献３の吸引カテーテル１０は、先端から基端まで連通する吸引ルーメン２４ａが形成された吸引チューブ２４と、吸引チューブ２４の先端側の外面に並列して接合されると共に、前記吸引チューブ２４の外部に開口部２２を有するガイドワイヤルーメン２０ａが形成されたガイドワイヤチューブ２０とを備える。前記吸引チューブ２４は、一部の外面が前記吸引ルーメン２４ａの軸線Ｏ１方向に略平行する平坦部４０を有し、前記ガイドワイヤルーメン２０ａの開口部２２が、前記吸引チューブ２４の前記平坦部４０に位置している。 In addition, 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.
特開２０１０－５７８３１号公報JP 2010-57831 A 特開２００６－２９７０６３号公報JP 2006-297063 A 特開２０１２－３５０５９号公報（ＵＳ２０１２０１６３４４）JP 2012-35059 A (US2011016344)
　上記のような吸引カテーテルは、血管内の狭窄部付近まで、その先端を挿入させることが必要である。このため、吸引カテーテルは、ガイドワイヤの挿通性、操作性を低下することなく、先端部がより柔軟であることが求められている。
　本発明の目的は、ガイドワイヤの挿通性、操作性の低下がなく、かつ、先端部が柔軟であり、血管内壁に損傷を与えることなく、血管内の目的部位への挿入が容易である血管内異物吸引用カテーテルを提供するものである。 It is necessary to insert the tip of the suction catheter as described above to the vicinity of the stenosis in the blood vessel. For this reason, the suction catheter is required to have a more flexible distal end portion without reducing the insertion property and operability of the guide wire.
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.
　上記目的を達成する血管内異物吸引用カテーテルは、以下のものである。
　先端から基端まで連通するメインルーメンと、先端部に設けられたガイドワイヤルーメン保有部とを備える血管内異物吸引用カテーテルであって、前記血管内異物吸引用カテーテルは、前記ガイドワイヤルーメン保有部に設けられた易変形部を備え、前記易変形部は、前記ガイドワイヤルーメン保有部の先端と後端間の側面に設けられ、ガイドワイヤの挿通を阻害せず、かつ前記ガイドワイヤルーメン保有部のガイドワイヤルーメンと外部とを連通する連通部により形成されている血管内異物吸引用カテーテル。 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.
図１は、本発明の実施例の血管内異物吸引用カテーテルの正面図である。FIG. 1 is a front view of an intravascular foreign matter suction catheter according to an embodiment of the present invention. 図２は、図１に示した血管内異物吸引用カテーテルの先端部の拡大正面図である。2 is an enlarged front view of the distal end portion of the intravascular foreign matter suction catheter shown in FIG. 図３は、図１に示した血管内異物吸引用カテーテルの先端部の拡大平面図である。FIG. 3 is an enlarged plan view of a distal end portion of the intravascular foreign matter suction catheter shown in FIG. 図４は、図２のＡ－Ａ線拡大断面図である。4 is an enlarged cross-sectional view taken along line AA in FIG. 図５は、図２のＢ－Ｂ線拡大断面図である。FIG. 5 is an enlarged sectional view taken along line BB in FIG. 図６は、図１に示した血管内異物吸引用カテーテルの後端部の拡大断面図である。FIG. 6 is an enlarged cross-sectional view of the rear end portion of the intravascular foreign matter suction catheter shown in FIG. 図７は、図１に示した血管内異物吸引用カテーテルの先端部の拡大断面図である。FIG. 7 is an enlarged cross-sectional view of the distal end portion of the intravascular foreign matter suction catheter shown in FIG. 図８は、本発明の他の実施例の血管内異物吸引用カテーテルの先端部の拡大断面図である。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. 図９は、本発明の他の実施例の血管内異物吸引用カテーテルの先端部の拡大断面図である。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. 図１０は、本発明の血管内異物吸引用カテーテルの連通部を説明するための説明図である。FIG. 10 is an explanatory diagram for explaining a communicating portion of the intravascular foreign matter suction catheter according to the present invention.
　本発明の血管内異物吸引用カテーテルを図示する実施例を用いて説明する。
　本発明の血管内異物吸引用カテーテル１は、先端から基端まで連通するメインルーメン２０と、先端部に設けられたガイドワイヤルーメン保有部３とを備える。
　そして、血管内異物吸引用カテーテル１は、ガイドワイヤルーメン保有部３に設けられた易変形部１０を備え、易変形部１０は、ガイドワイヤルーメン保有部３の先端と後端間の側面に設けられ、ガイドワイヤの挿通を阻害せず、かつガイドワイヤルーメン保有部３のガイドワイヤルーメン３０と外部とを連通する連通部３３により形成されている。
　この実施例の血管内異物吸引用カテーテル１は、メインルーメン２０を有するカテーテルチューブ２と、ガイドワイヤルーメン３０を有する細径のサイドチューブ３１とからなる。サイドチューブ３１は、カテーテルチューブ２の先端部の側面に固着され、ガイドワイヤルーメン保有部３を形成している。カテーテルチューブ２とサイドチューブ３１は、互いに連通しておらず、隣接して独立している。 An intravascular foreign matter suction catheter according to the present invention will be described with reference to the illustrated embodiment.
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 according to this embodiment 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.
　カテーテルチューブ２の最先端には、先端に向かって傾斜して開口する吸引口を有するチップ部材２２が設けられている。サイドチューブ３１の最先端は、チップ部材２２の先端よりも少し突出しており、この突出部分にＸ線不透過マーカ（造影マーカ）３２が固着されている。Ｘ線不透過マーカ３２は、サイドチューブ３１の外周面に設けられ、金や白金等からなるＸ線（放射線）不透過性を有する材質によって形成されている。これにより、Ｘ線造影により、生体内におけるカテーテル１の先端位置を視認可能となっている。Ｘ線不透過マーカ３２は、外周面に露出しておらず、サイドチューブ３１に埋め込まれていてもよい。
　カテーテルチューブ２は、本体チューブ２１と、本体チューブ２１とチップ部材２２間に位置する複数の接合チューブからなる。この実施例のカテーテルチューブ２では、チップ部材２２の後端に接合された第１の接続チューブ２３と、この第１の接続チューブ２３の後端と本体チューブ２１の先端とを接続する第２の接続チューブ２４とを備えている。そして、第１の接続チューブ２３および第２の接続チューブ２４は、本体チューブ２１より柔軟であり、かつチップ部材２２より剛性の高いものが用いられている。そして、第１の接続チューブ２３は、第２の接続チューブ２４より柔軟なものが用いられている。 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. In the catheter tube 2 of this embodiment, 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. And 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.
　さらに、この実施例では、本体チューブ２１は、剛性付与体２８を備えている。
剛性付与体２８は、金属線からなる線状体により、網目状、螺旋状、複数本が直線状に配置されたものなどが好ましい。また、この実施例では、剛性付与体２８は、本体チューブ２１を形成する樹脂の外面または肉厚内に埋没している。
　剛性付与体２８を形成する線状体としては、金属線が好適であり、例えば、ステンレス線、アモルファス合金線などが好ましく、アモルファス合金線としては、鉄－ケイ素－ホウ素系合金、コバルト－ケイ素－ホウ素系合金、鉄－コバルト－クロム－モリブデン－ケイ素－ホウ素系合金などを用いて形成したアモルファス合金線が、好適に使用できる。アモルファス合金線は、上記のような金属を線状に押し出すとともに、急速に冷却することにより形成される非晶質構造を有するものであり、形成されたアモルファス合金線は、さらに適当な内径のダイヤモンドダイスを通すことにより細径化される。アモルファス合金線は、引張強度が高く、かつ弾性変形領域が広く、さらに、耐熱、耐腐食、耐疲労性に優れている。アモルファス合金線としては、線径５～３０μｍ、より好ましくは、１０～２０μｍが好適である。また、ステンレス線としては、線径２０～８０μｍ、より好ましくは、３０～７０μｍ、特に、４０～５０μｍが好適である。さらに、線径１～１０μｍ、より好ましくは、２～５μｍの金属線（例えば、アモルファス合金線、ステンレス線）を複数本、例えば３～７本を撚り、１０～２０μｍの１本の線状体１１としたものでもよい。 Further, in this embodiment, 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. In this embodiment, the rigidity imparting body 28 is buried in the outer surface or the thickness of the resin forming the main body tube 21.
As the linear body forming the rigidity-imparting body 28, a metal wire is suitable. For example, 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 μm, more preferably 10 to 20 μm. As the stainless steel wire, a wire diameter of 20 to 80 μm, more preferably 30 to 70 μm, particularly 40 to 50 μm is suitable. Further, a plurality of metal wires (for example, amorphous alloy wires and stainless steel wires) having a wire diameter of 1 to 10 μm, more preferably 2 to 5 μm are twisted, for example, 3 to 7, and one linear body of 10 to 20 μm. 11 may be used.
　そして、この実施例のカテーテルチューブ２では、その先端から後端まで伸びる内層チューブ２５を有している。そして、本体チューブ２１、チップ部材２２、第１の接続チューブ２３、第２の接続チューブ２４は、内層チューブ２５の外面を被覆するものとなっている。
　カテーテルチューブ２は、外径が１．１ｍｍ～４．０ｍｍ、好ましくは１．２ｍｍ～３．０ｍｍであり、肉厚が２０μｍ～５００μｍ、好ましくは１００μｍ～４００μｍであり、長さが５００ｍｍ～２０００ｍｍ、好ましくは１２００ｍｍ～１６００ｍｍである。 And in the catheter tube 2 of this Example, it has the inner layer tube 25 extended from the front-end | tip to the rear 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 μm to 500 μm, preferably 100 μm to 400 μm, and a length of 500 mm to 2000 mm. The thickness is preferably 1200 mm to 1600 mm.
　サイドチューブ３１は、その先端開口からガイドワイヤをガイドワイヤルーメン３０内に挿入可能であり、かつ、基端開口部３４より、外部に導出可能である。また、サイドチューブ３１は、カテーテルチューブ２のチップ部材２２の先端より、メインチューブ２１とチップ部材２２との接合部を越え、所定長メインチューブの基端側に延びるものとなっている。特に、図示する実施例のものでは、サイドチューブ３１は、カテーテルチューブ２のチップ部材２２の先端より延び、本体チューブ２１の先端部外面に到達するものとなっている。
　サイドチューブ３１は、外径が０．４ｍｍ～１．２ｍｍ、好ましくは０．６ｍｍ～１．０ｍｍであり、肉厚が１０μｍ～４００μｍ、好ましくは１００μｍ～２５０μｍであり、長さが１０ｍｍ～３５０ｍｍ、好ましくは２５ｍｍ～２５０ｍｍである。 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 μm to 400 μm, preferably 100 μm to 250 μm, a length of 10 mm to 350 mm, Preferably, it is 25 mm to 250 mm.
　図２、図３、図４および図７に示すように、この実施例のカテーテル１では、ガイドワイヤルーメン保有部３の先端部となる部分に形成された易変形部１０を有している。言い換えれば、サイドチューブ３１が設けられた部分の先端側部分が易変形部となっている。そして、易変形部は、ガイドワイヤルーメン保有部３の先端と後端間に設けられた向かい合う２つのガイドワイヤルーメン開口間の空隙部３３により形成されている。空隙部３３は、複数設けられている。このような連通部（空隙部）３３は、サイドチューブ３１の側部を部分的に除去し、ガイドワイヤルーメン３０と外部とを連通するスリットを設けることにより、形成される。また、短いチューブを軸方向に複数かつ、若干離間するように配置することにより、連通部（空隙部）３３を形成してもよい。そして、この実施例のものでは、易変形部１０を形成するサイドチューブ３１の連通部（空隙部）３３は、カテーテルチューブ２におけるチップ部材２２の接合部（この実施例では、チップ部材２２の後端と第１の接続チューブ２３の先端の接合部）の接合部上に位置している。このため、チップ部材の接合部におけるカテーテルの変形性が良好なものとなっている。また、この実施例のカテーテル１では、連通部（空隙部）３３は、ガイドワイヤルーメン保有部３の軸方向に複数、具体的には、３つ設けられている。このように複数設けることにより、易変形部１０における変形が良好なものとなる。 As shown in FIGS. 2, 3, 4 and 7, 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. In other words, 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. Further, 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. In this embodiment, 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 | tip of the 1st connection tube 23). For this reason, the deformability of the catheter at the joint portion of the tip member is good. In the catheter 1 of this embodiment, 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.
　連通部（空隙部）３３として、この実施例のようなある程度の軸方向距離（軸方向幅）を有する場合、その数としては、２～５個が好適である。また、連通部（空隙部）３３の軸方向距離（軸方向幅）は、１０～５０ｍｍが好適である。また、隣り合う連通部（空隙部）３３間の軸方向距離は、１～５ｍｍが好適である。
　また、図２、図４に示すように、この実施例のカテーテル１では、連通部（空隙部）３３は、サイドチューブ３１を完全に分断しないものとなっている。このようにすることにより、ガイドワイヤルーメン３０は、その下面が半筒状にて連続したものとなり、ガイドワイヤの挿通性の低下が少ない。このような連通部（空隙部）３３が、サイドチューブ３１を完全に分断しない場合の連通部（空隙部）３３の開口部分のサイドチューブ３１の中心に対する角度Ｒ（図１０参照）は、９０～２７０度であることが好ましい。なお、図４に示すものでは、開口部分のサイドチューブ３１の中心に対する角度は、約１８０度となっている。 When the communication portion (gap portion) 33 has a certain axial distance (axial width) as in this embodiment, 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. When such a communication part (gap part) 33 does not completely divide the side tube 31, 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 | times.
　ガイドワイヤルーメン保有部として、図８に示す血管内異物吸引用カテーテル１ａが備えるようなものであってもよい。
　この実施例の血管内異物吸引用カテーテル１ａでは、ガイドワイヤルーメン保有部３ａを備えている。この実施例のカテーテル１ａにおいても、サイドチューブ３１は、その先端開口からガイドワイヤをガイドワイヤルーメン３０内に挿入可能であり、かつ、基端開口部３４より、外部に導出可能である。また、サイドチューブ３１は、カテーテルチューブ２のチップ部材２２の先端より、メインチューブ２１とチップ部材２２との接合部を越え、本体チューブ２１の先端部外面に到達するものとなっている。 As a guide wire lumen holding part, 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. Also in the catheter 1a of this embodiment, 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.
　図８に示すように、この実施例のカテーテル１ａでは、ガイドワイヤルーメン保有部３ａの全体が易変形部となっている。易変形部は、ガイドワイヤルーメン保有部３ａの全体にわたり設けられた連通部（スリット）３５により形成されている。連通部（スリット）３５は、ガイドワイヤルーメン保有部３ａの軸方向に多数、ほぼ平行に設けられている。このように多数のスリットを設けることにより、ガイドワイヤルーメン保有部３ａ（サイドチューブ３１）の変形が良好なものとなり、サイドチューブを有する部分におけるカテーテルの変形も良好なものとなる。連通部（スリット）３５の軸方向ピッチとしては、５～１０ｍｍが好適である。連通部（スリット）３５の幅は、０～５ｍｍが好適である。 As shown in FIG. 8, in the catheter 1a of this embodiment, 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. By providing a large number of slits in this way, the guide wire lumen holding portion 3a (side tube 31) is deformed well, and the catheter is also deformed well in the portion having the side tube. 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.
　また、連通部（スリット３５）のピッチは、一定であるものに限定されない。例えば、サイドチューブ３１の先端部における連通部（スリット）３５のピッチが短いものであってもよい。さらには、連通部（スリット）３５のピッチは、サイドチューブの先端部が短く、後端部に向かって、徐々にもしくは段階的に、長くなるものであってもよい。
　そして、この実施例においては、連通部（スリット）３５は、サイドチューブ３１を完全に分断しないものであることが好ましい。このようにすることにより、ガイドワイヤルーメン３０は、その下面が半筒状にて連続したものとなり、ガイドワイヤの挿通性の低下が少ない。このような連通部（スリット）３５が、サイドチューブ３１を完全に分断しない場合の連通部（スリット）３５の開口部分のサイドチューブ３１の中心に対する角度は、９０～２７０度であることが好ましい。 Further, the pitch of the communication portions (slits 35) is not limited to a constant pitch. For example, the pitch of the communication portions (slits) 35 at the tip of the side tube 31 may be short. Furthermore, 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.
In this embodiment, it is preferable that the communication portion (slit) 35 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. When such a communication portion (slit) 35 does not completely divide the side tube 31, 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.
　ガイドワイヤルーメン保有部として、図９に示す血管内異物吸引用カテーテル１ｂが備えるようなものであってもよい。
　この実施例の血管内異物吸引用カテーテル１ｂでは、ガイドワイヤルーメン保有部３ｂを備えている。この実施例のカテーテル１ｂにおいても、サイドチューブ３１は、その先端開口からガイドワイヤをガイドワイヤルーメン３０内に挿入可能であり、かつ、基端開口部３４より、外部に導出可能である。また、サイドチューブ３１は、カテーテルチューブ２のチップ部材２２の先端より、メインチューブ２１とチップ部材２２との接合部を越え、本体チューブ２１の先端部外面に到達するものとなっている。
　図９に示すように、この実施例のカテーテル１ｂでは、ガイドワイヤルーメン保有部３ｂの全体が易変形部となっている。易変形部は、ガイドワイヤルーメン保有部３ｂの全体にわたり設けられた連通部（螺旋状スリット）３６により形成されている。連通部（螺旋状スリット）３６は、ガイドワイヤルーメン保有部３ｂ（サイドチューブ３１）の全長にわたり設けられている。このように、全長に渡る螺旋状スリットを設けることにより、ガイドワイヤルーメン保有部３ｂ（サイドチューブ３１）の変形が良好なものとなり、サイドチューブを有する部分におけるカテーテルの変形も良好なものとなる。 As a guide wire lumen holding part, 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. Also in the catheter 1b of this embodiment, 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. 9, in the catheter 1b of this embodiment, 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). Thus, by providing the spiral slit over the entire length, the guide wire lumen holding portion 3b (side tube 31) is deformed well, and the catheter is also deformed well in the portion having the side tube.
　連通部（螺旋状スリット）３６の軸方向ピッチとしては、５～１０ｍｍが好適である。また、連通部（螺旋状スリット）３６の幅は、０～５ｍｍが好適である。また、連通部（螺旋状スリット３６）のピッチは、一定であるものに限定されない。例えば、サイドチューブ３１の先端部における連通部（螺旋状スリット）３６のピッチが短いものであってもよい。さらには、連通部（螺旋状スリット）３６のピッチは、サイドチューブの先端部が短く、後端部に向かって、徐々にもしくは段階的に、長くなるものであってもよい。
　そして、連通部（螺旋状スリット）３６の底部部分には、カテーテルチューブ２の形成材料（具体的には、本体チューブ、チップ部材、第１および第２の接続チューブ）の形成材料が流入し、部分的に、螺旋状スリットが消失しているものであってもよい。このようにすることにより、ガイドワイヤルーメン３０は、その下面が実質的に半筒状にて連続したものとなり、ガイドワイヤの挿通性の低下が少ない。このような連通部（螺旋状スリット）３６が、部分的に消失する場合における連通部（螺旋状スリット）３６のスリット残存部分のサイドチューブ３１の中心に対する角度は、９０～２７０度であることが好ましい。 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. Further, the pitch of the communication portions (spiral slit 36) is not limited to a constant pitch. For example, the pitch of the communication portions (spiral slits) 36 at the distal end portion of the side tube 31 may be short. Furthermore, 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.
Then, 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. By doing so, 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. When such a communication portion (spiral slit) 36 partially disappears, 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.
　ハブ４は、図１および図６に示すような形状および構造を有している。具体的には、ハブ４は、貫通した内部通路４０を有する筒状本体部４１と、本体部４１の先端に設けられ、カテーテルチューブ２の後端部２９内に押し込まれる筒状先端部４３と、本体部４１の側部より外方に延出する２つの翼部４２と、本体４１部の後端に設けられた接続部４４とを備えている。接続部４４には、シリンジ等の吸引手段が装着可能となっている。さらに、この実施例のカテーテル１では、カテーテルチューブ２の後端部を被覆するように設けられたキンク防止用チューブ５が設けられている。キンク防止用チューブ５は、ハブ４の先端部４３が挿入された部分のカテーテルチューブ２の後端を被覆する後部５１と、ハブ４の先端部４３の先端を越えて先端方向に伸び、かつ、縮径するテーパー部５２を備えている。このような、チューブ５を設けることにより、ハブ４の先端でのカテーテルのキンクが防止される。 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. Furthermore, in the catheter 1 of this embodiment, 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.
　そして、カテーテルチューブ２は、例えば、可撓性熱可塑性樹脂の外層と、ある程度の補形性を有する材料の内層２５を有する２層チューブであることが好ましい。また、チップ部材２２、第１および第２の接続チューブ２３，２４、本体チューブ２１は、サイドチューブ３１の外層と相溶性のある材質により形成される。
　カテーテルチューブ２（チップ部材２２、第１および第２の接続チューブ２３，２４は、本体チューブ２１）およびサイドチューブ３１に用いられる合成樹脂としては、例えば、ポリオレフィン（例えば、ポリエチレン、ポリプロピレン）、ポリオレフィンエラストマー（例えば、ポリエチレンエラストマー、ポリプロピレンエラストマー、エチレンープロピレン共重合体などを用いたエラストマー等）、ポリ塩化ビニル、エチレン－酢酸ビニル共重合体、ポリアミドエラストマー、ポリウレタン、フッ素樹脂等の熱可塑性樹脂、シリコーンゴム等が使用でき、好ましくは、ポリエチレン、ポリアミドエラストマーあるいはポリウレタンである。また、カテーテルチューブ２およびサイドチューブは、ガイドワイヤの湾曲の妨げにならない程度に柔軟であることが好ましい。 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. Further, 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.
Examples of 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. (Eg, elastomers using polyethylene elastomers, polypropylene elastomers, ethylene-propylene copolymers, etc.), thermoplastic resins such as polyvinyl chloride, ethylene-vinyl acetate copolymers, polyamide elastomers, polyurethane, fluororesins, silicone rubber Etc., preferably polyethylene, polyamide elastomer or polyurethane. Moreover, it is preferable that the catheter tube 2 and the side tube are flexible to the extent that they do not hinder the bending of the guide wire.
　また、内層の形成材料としては、カテーテルチューブの形成材料として、上述した可撓性樹脂、さらには、硬質樹脂を用いてもよい。硬質合成樹脂としては、ＰＴＦＥ，ＥＴＦＥなどのフッ素樹脂、ポリイミド、ポリエステル（例えば、ポリエチレンテレフタレート、ポリブチレンテレフタレート）、ポリオレフィン（例えば、ポリエチレン、ポリプロピレン）、ポリアミド、ポリイミドなどが用いられる。
　そして、図４および図５に示すように、カテーテルチューブ２は、先端部かつ軸方向に伸びる凹部を備えており、この凹部に、サイドチューブ３１が融着されている。また、カテーテルチューブ２は、上記凹部を形成するメインルーメン内に突出する軸方向突出部２６を備えている。よって、カテーテルチューブ２の凹部を有する部分は、内層２５を含むカテーテルチューブ２の内壁が、内側に突出している。このため、カテーテルチューブ２の凹部を有する部分は、メインルーメンが、断面円形ではなく、一部が、平坦面化した変形形態となっている。
また、カテーテルチューブ２の先端２７は、サイトチューブ３１側に先端を有する傾斜開口部となっている。また、サイドチューブ３１の基端開口部３４も傾斜開口部となっている。 In addition, as the material for forming the inner layer, the above-described flexible resin or hard resin may be used as the catheter tube forming material. As 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.
As shown in FIGS. 4 and 5, 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. Therefore, 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 | transformation form in which the main lumen was not circular in cross section but a part was flattened.
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.
　本発明の血管内異物吸引用カテーテルは、以下のものである。
（１）先端から基端まで連通するメインルーメンと、先端部に設けられたガイドワイヤルーメン保有部とを備える血管内異物吸引用カテーテルであって、前記血管内異物吸引用カテーテルは、前記ガイドワイヤルーメン保有部に設けられた易変形部を備え、前記易変形部は、前記ガイドワイヤルーメン保有部の先端と後端間の側面に設けられ、ガイドワイヤの挿通を阻害せず、かつ前記ガイドワイヤルーメン保有部のガイドワイヤルーメンと外部とを連通する連通部により形成されている血管内異物吸引用カテーテル。
　この血管内異物吸引用カテーテルでは、ガイドワイヤルーメン保有部に設けられた易変形部を有することにより、ガイドワイヤルーメン保有部の付設により硬質化しやすいカテーテル先端部の変形性を向上させることができる。これにより、ガイドワイヤの挿通性、操作性の低下がなく、かつ、先端部が柔軟であり、血管内壁に損傷を与えることなく、血管内の目的部位への挿入が容易なものとなる。 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.
In 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.
　そして、上記血管内異物吸引用カテーテルの実施形態としては、以下のものであってもよい。
（２）　前記易変形部を形成する連通部は、前記ガイドワイヤルーメン保有部の先端と後端間に設けられた向かい合う２つのガイドワイヤルーメン開口間の空隙部により形成されている上記（１）に記載の血管内異物吸引用カテーテル。
（３）　前記易変形部を形成する連通部は、前記ガイドワイヤルーメンと外部とを連通するスリットにより形成されている上記（１）に記載の血管内異物吸引用カテーテル。
（４）　前記易変形部を形成する連通部は、前記ガイドワイヤルーメンと外部とを連通するとともに、前記ガイドワイヤルーメンの周方向もしくは軸方向斜めに延びるものとなっている上記（１）ないし（３）のいずれかに記載の血管内異物吸引用カテーテル。
（５）　前記易変形部を形成する連通部は、前記ガイドワイヤルーメン保有部の軸方向に複数設けられている上記（１）ないし（４）のいずれかに記載の血管内異物吸引用カテーテル。
（６）　前記血管内異物吸引用カテーテルは、前記メインルーメンを有するカテーテルチューブと、前記ガイドワイヤルーメンを有する細径のサイドチューブとからなり、前記サイドチューブは、前記カテーテルチューブの先端部の側面に固着され、前記ガイドワイヤルーメン保有部を形成している上記（１）ないし（５）のいずれかに記載の血管内異物吸引用カテーテル。
（７）　前記カテーテルチューブは、メインチューブと、前記メインチューブの先端部に設けられ、かつ吸引口を有するチップ部材とを備えており、前記サイドチューブは、前記チップ部材の先端より、前記メインチューブと前記チップ部材との接合部を越え、所定長前記メインチューブの基端側に延びるものとなっており、前記易変形部を形成する連通部は、前記メインチューブと前記チップ部材との接合部上に位置している上記（６）に記載の血管内異物吸引用カテーテル。
（８）　前記サイドチューブは、複数の周方向スリットもしくは螺旋状スリットを有している上記（６）に記載の血管内異物吸引用カテーテル。 The following embodiments of the intravascular foreign matter suction catheter may be used.
(2) 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. A catheter for suctioning foreign matter in blood vessels according to 1.
(3) The intravascular foreign matter suction catheter according to (1), wherein the communication portion forming the easily deformable portion is formed by a slit that connects the guide wire lumen and the outside.
(4) 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).
(5) 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.
(6) 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 intravascular foreign matter suction catheter according to any one of (1) to (5), which is fixed and forms the guide wire lumen holding portion.
(7) 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. The intravascular foreign matter suction catheter according to (6), which is located above.
(8) The intravascular foreign matter suction catheter according to (6), wherein the side tube has a plurality of circumferential slits or spiral slits.

Claims (8)

  1. 先端から基端まで連通するメインルーメンと、先端部に設けられたガイドワイヤルーメン保有部とを備える血管内異物吸引用カテーテルであって、
    　前記血管内異物吸引用カテーテルは、前記ガイドワイヤルーメン保有部に設けられた易変形部を備え、前記易変形部は、前記ガイドワイヤルーメン保有部の先端と後端間の側面に設けられ、ガイドワイヤの挿通を阻害せず、かつ前記ガイドワイヤルーメン保有部のガイドワイヤルーメンと外部とを連通する連通部により形成されていることを特徴とする血管内異物吸引用カテーテル。     A catheter for sucking intravascular foreign matter 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,
    The intravascular foreign matter suction catheter includes an easily deformable portion provided in the guide wire 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. An intravascular foreign matter suction catheter characterized by being formed by a communicating portion that does not hinder the insertion of a wire and communicates the guide wire lumen of the guide wire lumen holding portion with the outside.
  2. 前記易変形部を形成する連通部は、前記ガイドワイヤルーメン保有部の先端と後端間に設けられた向かい合う２つのガイドワイヤルーメン開口間の空隙部により形成されている請求項１に記載の血管内異物吸引用カテーテル。 2. The blood vessel according to claim 1, wherein the communicating part forming the easily deformable part is formed by a gap between two opposing guide wire lumen openings provided between a front end and a rear end of the guide wire lumen holding part. Internal foreign substance suction catheter.
  3. 前記易変形部を形成する連通部は、前記ガイドワイヤルーメンと外部とを連通するスリットにより形成されている請求項１に記載の血管内異物吸引用カテーテル。 2. The intravascular foreign matter suction catheter according to claim 1, wherein the communicating portion forming the easily deformable portion is formed by a slit that communicates the guide wire lumen with the outside.
  4. 前記易変形部を形成する連通部は、前記ガイドワイヤルーメンと外部とを連通するとともに、前記ガイドワイヤルーメンの周方向もしくは軸方向斜めに延びるものとなっている請求項１ないし３のいずれかに記載の血管内異物吸引用カテーテル。 4. The communication part forming the easily deformable part communicates the guide wire lumen with the outside and extends obliquely in the circumferential direction or the axial direction of the guide wire lumen. The intravascular foreign matter suction catheter as described.
  5. 前記易変形部を形成する連通部は、前記ガイドワイヤルーメン保有部の軸方向に複数設けられている請求項１ないし４のいずれかに記載の血管内異物吸引用カテーテル。 5. The intravascular foreign matter suction catheter according to claim 1, wherein a plurality of communication portions forming the easily deformable portion are provided in the axial direction of the guide wire lumen holding portion.
  6. 前記血管内異物吸引用カテーテルは、前記メインルーメンを有するカテーテルチューブと、前記ガイドワイヤルーメンを有する細径のサイドチューブとからなり、前記サイドチューブは、前記カテーテルチューブの先端部の側面に固着され、前記ガイドワイヤルーメン保有部を形成している請求項１ないし５のいずれかに記載の血管内異物吸引用カテーテル。 The intravascular foreign matter suction catheter is composed of a catheter tube having the main lumen and a thin side tube having the guide wire lumen, and the side tube is fixed to a side surface of a distal end portion of the catheter tube. The intravascular foreign matter suction catheter according to any one of claims 1 to 5, wherein the guide wire lumen holding portion is formed.
  7. 前記カテーテルチューブは、メインチューブと、前記メインチューブの先端部に設けられ、かつ吸引口を有するチップ部材とを備えており、前記サイドチューブは、前記チップ部材の先端より、前記メインチューブと前記チップ部材との接合部を越え、所定長前記メインチューブの基端側に延びるものとなっており、前記易変形部を形成する連通部は、前記メインチューブと前記チップ部材との接合部上に位置している請求項６に記載の血管内異物吸引用カテーテル。 The catheter tube includes a main tube and a tip member that is provided at a distal end portion of the main tube and has a suction port, and the side tube extends from the distal end of the tip member to the main tube and the tip. It extends beyond the joint portion with the member and extends to the base end side of the main tube for a predetermined length, and the communication portion forming the easily deformable portion is located on the joint portion between the main tube and the tip member. The intravascular foreign matter suction catheter according to claim 6.
  8. 前記サイドチューブは、複数の周方向スリットもしくは螺旋状スリットを有している請求項６に記載の血管内異物吸引用カテーテル。 The intravascular foreign matter suction catheter according to claim 6, wherein the side tube has a plurality of circumferential slits or spiral slits.
PCT/JP2013/058575 2013-03-25 2013-03-25 Intravascular foreign matter suctioning catheter WO2014155489A1 (en)

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WO2021106716A1 (en) * 2019-11-25 2021-06-03 ニプロ株式会社 Flow path switching device

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JPH0584306A (en) * 1991-09-26 1993-04-06 Sumitomo Bakelite Co Ltd Medical guidance tube
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 (en) * 2001-03-16 2002-09-24 Olympus Optical Co Ltd Catheter
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WO2006043582A1 (en) * 2004-10-22 2006-04-27 Kaneka Corporation Catheter for medical treatment
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Publication number Priority date Publication date Assignee Title
JPH0584306A (en) * 1991-09-26 1993-04-06 Sumitomo Bakelite Co Ltd Medical guidance tube
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 (en) * 2001-03-16 2002-09-24 Olympus Optical Co Ltd Catheter
JP2004351005A (en) * 2003-05-29 2004-12-16 Japan Science & Technology Agency Flexible tube, and its production method
WO2006043582A1 (en) * 2004-10-22 2006-04-27 Kaneka Corporation Catheter for medical treatment
WO2008123521A1 (en) * 2007-04-03 2008-10-16 Nipro Corporation Thrombus-aspiration catheter
JP2013031523A (en) * 2011-08-01 2013-02-14 Goodman Co Ltd Suction catheter

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Publication number Priority date Publication date Assignee Title
WO2021106716A1 (en) * 2019-11-25 2021-06-03 ニプロ株式会社 Flow path switching device

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