WO2014103599A1 - Cathéter - Google Patents

Cathéter Download PDF

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Publication number
WO2014103599A1
WO2014103599A1 PCT/JP2013/081953 JP2013081953W WO2014103599A1 WO 2014103599 A1 WO2014103599 A1 WO 2014103599A1 JP 2013081953 W JP2013081953 W JP 2013081953W WO 2014103599 A1 WO2014103599 A1 WO 2014103599A1
Authority
WO
WIPO (PCT)
Prior art keywords
hub
catheter
shaft
guide wire
proximal end
Prior art date
Application number
PCT/JP2013/081953
Other languages
English (en)
Japanese (ja)
Inventor
川口道寛
Original Assignee
テルモ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by テルモ株式会社 filed Critical テルモ株式会社
Priority to JP2014554263A priority Critical patent/JP6326377B2/ja
Publication of WO2014103599A1 publication Critical patent/WO2014103599A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0097—Catheters; Hollow probes characterised by the hub

Definitions

  • the present invention relates to a catheter.
  • This type of catheter generally has an elongate shaft constituting the catheter body and a hub connected to the proximal end of the shaft (see, for example, US Pat. No. 6,355,027).
  • the proximal end portion of the guide wire is inserted from the distal end of the shaft of the catheter, and the base of the guide wire is inserted.
  • the end must be moved in the proximal direction relative to the shaft, and the hub lumen must be passed in the proximal direction.
  • the guide wire moves by being caught by the base end of the guide wire. Resistance may occur and it may be difficult to move the guide wire further proximally within the hub.
  • the proximal end portion of the guide wire may be bent and used. In such a case, the proximal end portion of the guide wire is easily caught by the step.
  • An object of the present invention is to provide a catheter that can be smoothly moved in the proximal direction.
  • the present invention provides a catheter comprising a shaft constituting a catheter body and a hub provided at the proximal end of the shaft, the hub holding the proximal end of the shaft.
  • a shaft holding portion ; and a hub lumen forming portion that is provided on a proximal side of the shaft holding portion and that communicates with a lumen of the shaft.
  • the hub lumen forming portion includes: It is provided on the base end side with respect to the shaft holding part through a step part reduced in diameter with respect to the shaft holding part, and the step part has an inner edge part whose inner diameter decreases toward the base end direction. To do.
  • the inner diameter of the inner edge of the stepped portion reduced in diameter relative to the proximal end of the shaft in the hub decreases toward the proximal end. Therefore, even when there is a step between the inner periphery of the shaft and the inner periphery of the hub, when inserting the guide wire from the distal end of the catheter and passing the proximal end of the guide wire through the hub, the proximal direction Due to the guide action of the inner edge portion whose inner diameter decreases toward the upper end, the proximal end portion of the guide wire is not caught by the stepped portion, so that the proximal end portion of the guide wire is suitably guided into the hub lumen. As a result, the proximal end portion of the guide wire can be smoothly moved in the proximal direction within the hub.
  • the proximal end of the shaft may abut on the stepped portion provided on the hub.
  • the proximal end portion of the guide wire does not enter between the proximal end of the shaft and the stepped portion, and the proximal end portion of the guide wire is moved more smoothly in the proximal direction within the hub. Can do.
  • the inner edge portion provided on the hub may have an arcuate shape in a longitudinal section of the hub.
  • the guide wire when the guide wire is inserted from the distal end of the catheter and the proximal end portion of the guide wire is passed through the hub, the guide wire has an R shape even when the proximal end portion of the guide wire contacts the stepped portion.
  • the inner edge portion smoothly guides the proximal end portion of the guide wire to the axial line side of the hub.
  • the inner edge portion provided on the hub may have a straight shape in a longitudinal section of the hub.
  • the guide wire when the guide wire is inserted from the distal end of the catheter and the proximal end portion of the guide wire is passed through the hub, the guide wire is inclined linearly even when the proximal end portion of the guide wire contacts the stepped portion.
  • the proximal end portion of the guide wire is smoothly guided to the axial side of the hub by the inner edge portion.
  • the catheter of the present invention when the guide wire is inserted from the distal end of the catheter and the proximal end portion of the guide wire is passed through the hub, the guide action of the inner edge portion whose inner diameter decreases toward the proximal end direction, Since the proximal end portion of the guide wire is not caught by the stepped portion, the proximal end portion of the guide wire is suitably guided into the hub lumen. As a result, the proximal end portion of the guide wire can be smoothly moved in the proximal direction within the hub.
  • FIG. 1 is a partially omitted side view of a catheter according to an embodiment of the present invention.
  • FIG. 2 is a partially omitted longitudinal sectional view of the hub of the catheter shown in FIG. 1.
  • 3A is a partially omitted longitudinal sectional view of the hub shown in FIG. 2
  • FIG. 3B is a partially omitted longitudinal sectional view of the hub according to a modification.
  • FIG. 4A is a first diagram illustrating an operation of moving the proximal end portion of the guide wire in the proximal direction in the hub, and FIG. 4B moves the proximal end portion of the guide wire in the proximal direction in the hub.
  • FIG. 4C is a third diagram illustrating an operation of moving the proximal end portion of the guide wire in the proximal direction in the hub.
  • FIG. 1 is a partially omitted side view of a catheter 10 according to an embodiment of the present invention.
  • the catheter 10 is inserted into a blood vessel or body cavity so that the tip reaches a target site, and is used to inject a therapeutic drug or a diagnostic contrast medium.
  • the catheter 10 includes a thin and long shaft 12, a hub 14 connected to the proximal end of the shaft 12, and a strain relief 16 provided at a connection portion of the shaft 12 to the hub 14. With.
  • the shaft 12 constitutes a catheter body that is inserted into a living body lumen such as a blood vessel, and has a flexibility in which a lumen 13 (see also FIG. 2) communicating from the distal end to the proximal end is formed. It is a long and thin tubular member.
  • the length of the shaft 12 is, for example, about 500 mm to 2000 mm, and preferably about 1000 mm to 1500 mm.
  • the outer diameter of the shaft 12 is, for example, about 0.3 mm to 3 mm, preferably about 0.4 mm to 2 mm.
  • the inner diameter of the shaft 12 is, for example, about 0.2 mm to 2.5 mm, preferably about 0.3 mm to 1.8 mm.
  • the outer diameter and inner diameter of the shaft 12 may be smaller toward the distal end side.
  • the most distal portion of the shaft 12 may have a taper.
  • An X-ray impermeable marker (contrast marker) 18 is fixed to the outer peripheral surface in the vicinity of the most distal portion of the shaft 12.
  • the radiopaque marker 18 is formed of a material having radiopacity that is made of gold, platinum, or the like, so that the distal end position of the catheter 10 can be viewed in vivo under radiography. Is.
  • the hub 14 is a member having a hollow structure that holds the proximal end of the shaft 12 at the distal end thereof, and other instruments such as a syringe can be connected to the proximal end.
  • the hub 14 can be made of, for example, a hard resin such as polycarbonate, polyethylene, or polypropylene.
  • the hub 14 is made of a transparent material (such as polycarbonate).
  • the strain relief 16 is for preventing bending (kinking) at the connection portion of the shaft 12 to the hub 14.
  • the strain relief 16 is formed of a resin having moderate flexibility and rigidity formed in a tapered tube shape. It is a member.
  • the strain relief 16 can be made of a material similar to that of the shaft 12.
  • FIG. 2 is a partially omitted vertical sectional view of the hub 14.
  • the hub 14 includes a hollow body portion 20 and a plurality (two in the illustrated example) of blade portions 22 protruding from the outer surface of the body portion 20.
  • the body portion 20 includes an inner peripheral portion that forms a hub lumen 24 that communicates with the lumen 13 of the shaft 12 (hereinafter referred to as “hub lumen forming portion 34”), and a proximal end that opens at the proximal end of the hub 14. And an opening 26.
  • a shaft holding portion 28 having a cylindrical inner surface is provided on the distal end side of the hub 14.
  • the base end portion 32 of the shaft 12 is held and fixed to the shaft holding portion 28.
  • a hub lumen forming portion 34 is provided on the proximal side of the shaft holding portion 28 via a step portion 30 having a diameter reduced with respect to the shaft holding portion 28.
  • At least a portion on the proximal end side of the hub lumen forming portion 34 is configured as a taper whose inner diameter decreases at a predetermined rate toward the distal end direction.
  • a luer taper part to which other devices is present on the base side.
  • the taper existing on the tip side of the luer taper portion may be a taper having the same inclination angle as the luer taper portion or a taper having an inclination angle different from the taper.
  • the hub 14 and the shaft 12 are manufactured separately, and the proximal end portion 32 of the shaft 12 is inserted into the distal end (shaft holding portion 28) of the hub 14, and adhesion, thermal fusion, or the like is performed. These are joined by appropriate joining means.
  • the hub 14 may be provided at the proximal end of the shaft 12 by insert molding.
  • FIG. 3A is a partially omitted vertical sectional view of the hub 14 shown in FIG.
  • the base end surface 12 a of the shaft 12 abuts on the tip 30 a of the stepped portion 30, thereby positioning the shaft 12 with respect to the hub 14.
  • a slight gap may be provided between the proximal end surface 12a of the shaft 12 and the distal end 30a of the stepped portion 30, but such a gap is provided in the guide wire 42 (see FIG. 4A and the like) in the hub 14.
  • the proximal end portion 43 of the guide wire 42 does not enter.
  • the inner diameter R1 of the proximal end side of the inner peripheral portion 36 forming the lumen 13 of the shaft 12 (hereinafter referred to as “shaft lumen forming portion 36”) is larger than the inner diameter R2 of the distal end portion of the hub lumen forming portion 34.
  • the step portion 30 is formed by this inner diameter difference.
  • the inner edge portion 38 of the stepped portion 30 has a shape curved in an arc shape in the longitudinal section of the hub 14 (R shape: so as to rise toward the inside of the hub 14. Curved shape).
  • the R shape is provided over the entire circumference of the inner edge portion 38 in the circumferential direction.
  • the inner diameter of the innermost portion 38 is the same as or larger than the diameter of the proximal end opening of the shaft 12 (the inner diameter R1 of the shaft 12).
  • the proximal end portion of the guide wire 42 is inserted when the guide wire 42 is inserted from the distal end of the catheter 10 and the proximal end portion 43 of the guide wire 42 is passed through the hub 14. Even when 43 contacts the stepped portion 30, the proximal end portion 43 of the guide wire 42 is smoothly guided to the axis a side of the hub 14 by the inner edge portion 38 having an R shape.
  • an inner edge 39 that is inclined linearly with respect to the axis a in the longitudinal section of the hub 14 may be employed as shown in FIG. 3B.
  • This linearly inclined shape is provided over the entire circumference of the inner edge 39 in the circumferential direction.
  • the inner diameter of the distal end portion of the inner edge portion 39 is the same as or larger than the diameter of the proximal end opening of the shaft 12.
  • the catheter 10 according to the present embodiment is basically configured as described above, and the operation and effect of the catheter 10 will be described below mainly with reference to FIGS. 4A to 4C.
  • the operation of inserting the guide wire 42 with the proximal end portion 43 bent from the distal end of the catheter 10 (the distal end opening of the shaft 12) and passing the proximal end portion 43 of the guide wire 42 into the hub 14 will be described.
  • the guide wire 42 in which the proximal end portion 43 is not bent (the proximal end portion 43 is linear) is inserted from the distal end of the catheter 10, the following effects can be obtained.
  • the proximal end portion 43 of the guide wire 42 comes into contact with a stepped portion provided on the proximal end side of the shaft in the hub, the proximal end portion 43 of the guide wire 42 contacts the stepped portion. May be caught to prevent the guide wire 42 from moving, and it may be difficult to move the guide wire 42 further in the proximal direction with respect to the hub.
  • the inner edge portion 38 of the step portion 30 provided in the hub 14 is formed so that the inner diameter decreases toward the proximal direction. Even when the end portion 43 comes into contact with the stepped portion 30, the base end portion 43 is guided (guided) toward the axis a by the inner edge portion 38. Therefore, as shown in FIG. 4C, the guide wire 42 is not prevented from moving by the step portion 30, and the guide wire 42 can be smoothly moved in the proximal direction in the hub 14.
  • the base end portion 43 is likely to come into contact with the stepped portion 30 when passing through the hub 14 as compared with the case where the base end portion 43 is linear.
  • the guide action of the inner edge portion 38 whose inner diameter decreases toward the base end direction causes the The proximal end 43 is smoothly guided into the hub lumen 24.
  • the inner diameter of the inner edge portion 38 of the stepped portion 30 that is reduced in diameter relative to the proximal end of the shaft 12 in the hub 14 decreases in the proximal direction. It has become a thing. Therefore, even when there is a stepped portion 30 between the shaft lumen forming portion 36 and the hub lumen forming portion 34, the guide wire 42 is inserted from the distal end of the catheter 10, and the proximal end portion 43 of the guide wire 42 is connected to the hub. 14, since the guide end of the inner edge portion 38 whose inner diameter decreases toward the base end is guided by the guide action of the inner edge portion 38, the base end portion 43 of the guide wire 42 is not caught by the stepped portion 30. End 43 is preferably guided into hub lumen 24. Thereby, the base end part 43 of the guide wire 42 can be smoothly moved in the base end direction in the hub 14.
  • the base end surface 12 a of the shaft 12 is in contact with the tip 30 a of the stepped portion 30 provided on the hub 14.
  • the base end portion 43 of the guide wire 42 does not enter between the base end portion 32 of the shaft 12 and the stepped portion 30, and the base end portion 43 of the guide wire 42 is more smoothly baseed in the hub 14. It can be moved in the end direction.
  • the inner edge portion 38 provided on the hub 14 has an arcuate shape in the longitudinal section of the hub 14 (curved so as to rise toward the inside of the hub 14. Shape).
  • the contact between the most proximal end portion 44 (see FIG. 4B) of the guide wire 42 and the inner edge portion 38 is close to a point contact, and the contact area is reduced, whereby the most proximal end portion of the guide wire 42 is obtained.
  • the frictional resistance between 44 and the inner edge 38 can be reduced. For this reason, when the proximal end portion 43 of the guide wire 42 is moved in the proximal direction within the hub 14, the proximal end portion 43 of the guide wire 42 easily passes through the stepped portion 30.
  • the proximal end portion 43 of the guide wire 42 is formed by the inner edge portion 39 that is inclined linearly. Since the guide is smoothly guided to the axis a side of the hub 14, the base end portion 43 is not caught by the stepped portion 30, and the base end portion 43 of the guide wire 42 is easily moved in the base end direction within the hub 14. Can be made.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

La présente invention concerne une embase (14) d'un cathéter (10) présentant une section portant une tige (28) permettant de porter l'extrémité proximale d'une tige (12) ainsi qu'une section formant lumière de l'embase (34) prévue plus près du côté de l'extrémité proximale que de la section portant la tige (28) et formant une lumière d'embase (24) communiquant avec lumière (13) de la tige (12). La section formant lumière de l'embase (34) est prévue plus près du côté de l'extrémité proximale que la section portant la tige (28), une section étagée (30) étant prévue entre la section formant lumière de l'embase (34) et la section portant la tige (28), la section étagée (30) ayant un diamètre réduit par rapport au diamètre de la section portant la tige (28). La section étagée (30) possède un bord interne (38) présentant un diamètre intérieur réduit vers l'extrémité proximale.
PCT/JP2013/081953 2012-12-25 2013-11-27 Cathéter WO2014103599A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014554263A JP6326377B2 (ja) 2012-12-25 2013-11-27 カテーテル

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-281218 2012-12-25
JP2012281218 2012-12-25

Publications (1)

Publication Number Publication Date
WO2014103599A1 true WO2014103599A1 (fr) 2014-07-03

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ID=51020693

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/081953 WO2014103599A1 (fr) 2012-12-25 2013-11-27 Cathéter

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JP (1) JP6326377B2 (fr)
WO (1) WO2014103599A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017086566A (ja) * 2015-11-12 2017-05-25 テルモ株式会社 医療用針の製造方法及び製造装置、並びに医療用針
JP2021053172A (ja) * 2019-09-30 2021-04-08 日立金属株式会社 医療用編組チューブアッセンブリ
WO2021177434A1 (fr) * 2020-03-05 2021-09-10 テルモ株式会社 Cathéter
WO2021246032A1 (fr) * 2020-06-01 2021-12-09 テルモ株式会社 Cathéter
WO2021246031A1 (fr) * 2020-06-01 2021-12-09 テルモ株式会社 Cathéter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07204277A (ja) * 1994-01-20 1995-08-08 Terumo Corp カテーテル
JP2004321223A (ja) * 2003-04-21 2004-11-18 Japan Lifeline Co Ltd インサーター、その製造方法及びカテーテル
JP2006122181A (ja) * 2004-10-27 2006-05-18 Terumo Corp 医療用チューブ保護具
JP2009072574A (ja) * 2007-08-20 2009-04-09 Atrion Medical Products Inc 高圧医療ホース用結合ソケット
JP2012071052A (ja) * 2010-09-29 2012-04-12 Terumo Corp 留置針および留置針の製造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0330108Y2 (fr) * 1987-01-09 1991-06-26
US8083728B2 (en) * 2004-03-18 2011-12-27 C. R. Bard, Inc. Multifunction adaptor for an open-ended catheter
JP5819928B2 (ja) * 2011-02-25 2015-11-24 テルモ株式会社 医療用コネクタ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07204277A (ja) * 1994-01-20 1995-08-08 Terumo Corp カテーテル
JP2004321223A (ja) * 2003-04-21 2004-11-18 Japan Lifeline Co Ltd インサーター、その製造方法及びカテーテル
JP2006122181A (ja) * 2004-10-27 2006-05-18 Terumo Corp 医療用チューブ保護具
JP2009072574A (ja) * 2007-08-20 2009-04-09 Atrion Medical Products Inc 高圧医療ホース用結合ソケット
JP2012071052A (ja) * 2010-09-29 2012-04-12 Terumo Corp 留置針および留置針の製造方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017086566A (ja) * 2015-11-12 2017-05-25 テルモ株式会社 医療用針の製造方法及び製造装置、並びに医療用針
JP2021053172A (ja) * 2019-09-30 2021-04-08 日立金属株式会社 医療用編組チューブアッセンブリ
JP7251430B2 (ja) 2019-09-30 2023-04-04 株式会社プロテリアル 医療用編組チューブアッセンブリ
WO2021177434A1 (fr) * 2020-03-05 2021-09-10 テルモ株式会社 Cathéter
WO2021246032A1 (fr) * 2020-06-01 2021-12-09 テルモ株式会社 Cathéter
WO2021246031A1 (fr) * 2020-06-01 2021-12-09 テルモ株式会社 Cathéter
EP4137189A4 (fr) * 2020-06-01 2023-11-22 TERUMO Kabushiki Kaisha Cathéter

Also Published As

Publication number Publication date
JPWO2014103599A1 (ja) 2017-01-12
JP6326377B2 (ja) 2018-05-16

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