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WO1993018813A1 - Tube a usage medical - Google Patents

Tube a usage medical Download PDF

Info

Publication number
WO1993018813A1
WO1993018813A1 PCT/JP1993/000318 JP9300318W WO9318813A1 WO 1993018813 A1 WO1993018813 A1 WO 1993018813A1 JP 9300318 W JP9300318 W JP 9300318W WO 9318813 A1 WO9318813 A1 WO 9318813A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
medical tube
tube according
medical
cross
Prior art date
Application number
PCT/JP1993/000318
Other languages
English (en)
Japanese (ja)
Inventor
Keiji Igaki
Sigeru Saito
Original Assignee
Keiji Igaki
Sigeru Saito
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 Keiji Igaki, Sigeru Saito filed Critical Keiji Igaki
Publication of WO1993018813A1 publication Critical patent/WO1993018813A1/fr

Links

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
    • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • 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

Definitions

  • the present invention relates to a medical tube used for inspection, diagnosis, treatment, and the like of a lesion generated in a blood vessel.
  • BACKGROUND ART In recent years, in the field of medicine, in examining, diagnosing, and treating lesions that have occurred in body lumens (vessels) such as the digestive tract and blood vessels, surgical methods, that is, direct examination of lesions, have been conducted. A method of opening a medical tube and inserting the medical tube into a lumen to reach a lesion is often adopted instead of using an incision method as much as possible.
  • various types of medical tubes are used to inject drugs into lesions
  • medical tubes with a tip attached to a device such as a sieve are used to remove lesions, remove gallstones, or perform medical treatments.
  • Observing the inside of the digestive tract and the like with an endoscope in which an image receiving optical lens and a light guiding optical fiber are housed in a tube is already a common technique.
  • Such medical tubes are also used for diagnosis and treatment of the circulatory system, such as injection of a contrast medium, measurement of blood pressure, and treatment of vascular stenosis caused by accumulation of atheroma on the inner wall of a blood vessel. It has become to be.
  • the treatment of vascular stenosis has traditionally been performed by a large-scale operation called bypass surgery, which has been difficult and difficult for the patient himself.
  • bypass surgery a large-scale operation called bypass surgery
  • a method is known in which the atheroma is excised using a medical tube having a shaver attached to the tip, or the atheroma is evaporated using a medical tube containing an optical fiber for guiding laser light.
  • a method of inserting a balloon catheter with a thin balloon into a medical tube inserted into a blood vessel to reach the atheroma area, and inflating the balloon catheter to expand the stenotic vessel lumen Proposed.
  • the medical tubing conventionally used generally has a circular cross-section, and in such a tube having a circular cross-section, in order to strengthen the stiffness, the tube is made thicker and the tube itself is made thicker. There is a need.
  • a tube with a circular cross section is simply made thicker, Thickness makes the body less supple and difficult to operate.
  • smooth passage through the vessel is lost, and it is particularly difficult to pass through a narrow part having a lesion.
  • the passability is improved by making the tube thinner. However, if the tube is made thinner, the stiffness becomes weaker and the restoring force becomes weaker, and the pushability and trackability deteriorate.
  • an object of the present invention is to provide a medical tube that is excellent in any of pushability, trackability 1, and crossability.
  • the medical tube of the present invention is characterized in that its cross section is flat (for example, elliptical).
  • Medical tubing is used for examination, diagnosis, and treatment of lesions that have occurred in vessels. It is used and inserted into a vascular vessel having a lesion, the tip reaches the lesion, and the operation at hand of the operator is transmitted to the tip to exert a medical effect.
  • the flat-shaped medical tubing has strong stiffness, high strength and excellent flexibility, and it can be easily bent only in the short axis direction, so that the operation at hand of the surgeon is accurately transmitted to the distal end. . In addition, it passes smoothly even in a vessel having a lesion. In other words, it has excellent pushability, trackability, and crossability.
  • FIG. 1 is a perspective view showing an example of the medical tube of the present invention.
  • FIG. 2 is a sectional view showing an example of the medical tube of the present invention.
  • FIG. 3 is a cross-sectional view showing a medical tube inserted into a vessel having a lesion.
  • FIG. 4 is a sectional view showing another example of the medical tube of the present invention.
  • FIG. 5 is a cross-sectional view showing an example of a tube having a two-layer structure of steel and plastic.
  • FIG. 6 is a schematic perspective view of a main part of an example of a plastic tube with a mesh interposed therebetween, partially cut away.
  • FIG. 7 is a schematic perspective view of a main part showing an example of a tube having a spiral groove formed on the surface.
  • FIG. 8 is a schematic perspective view of a main part showing an example of a tube having fine projections formed on the surface.
  • FIG. 9 is a cross-sectional view showing an example of a tube having a pair of inner holes c .
  • FIG. 10 is a cross-sectional view showing another example of a tube having a pair of inner holes formed therein
  • FIG. 11 is a cross-sectional view showing an example of a tube in which a plurality of inner holes are arranged asymmetrically.
  • FIG. 12 is a cross-sectional view showing an example of a tear-shaped tube.
  • FIG. 13 is a cross-sectional view showing another example of a tube having a tear-shaped cross section.
  • FIG. 14 is a sectional view showing an example in which the present invention is applied to a tube of an endoscope.
  • a cardiac catheter 1 is inserted into the atrium or ventricle of the heart, for example, from a vein or artery, and is used to test the function of the heart
  • a soft plastic tube having a flat cross section in this embodiment, a substantially elliptical cross section
  • It has a predetermined length and a center hole 2 having a substantially circular cross section for injecting various drugs, contrast media, and the like in the center.
  • the tip 3 is tapered to facilitate insertion and not to damage the blood vessel.
  • the outer shape is elliptical, whereas the shape of the center hole is circular, so that the thickness is increased in the major axis direction of the ellipse (the X-axis direction in FIG. 2).
  • the stiffness becomes stronger and the resilience is obtained, so that the above-mentioned push appeal can be secured.
  • flexibility is obtained by setting the thin portion 5 in the short axis direction (the Y axis direction in FIG. 2). That is, since it is selectively bent in the short-axis direction (Y-axis direction), the operation at hand of the operator can be transmitted to the distal end portion 3 by controlling the insertion direction, and the track ability and the cross ability can be transmitted. Can also be secured o
  • the blood vessel 31 having the lesion 32 usually has a luminal cross-sectional shape close to a flat shape. Therefore, it is difficult to insert a tube with a perfectly circular cross section.However, the heart catheter 1 with a flat cross section must be operated so that the short-axis direction is the narrowest part of the blood vessel 31. Thereby, it can be smoothly inserted into the blood vessel 31 having such a lesion 32.
  • a hole 41 such as a lead hole through which an air hole or a lead wire passes is used depending on the application, and a thick portion in the X-axis direction is formed. 4 may be formed.
  • the hole By arranging 4 1 on the long axis centering on the center hole 2, the operation at hand of the surgeon can be evenly transmitted to the entire tube, and operability is improved.
  • the heart catheter 1 In order to supply a contrast agent to, for example, the heart using such a heart catheter 1, the heart catheter 1 is introduced through a blood vessel, for example, at the Sookee part or the elbow part. At this time, the heart catheter 1 smoothly passes through the blood vessel and easily reaches the heart by the operation at hand of the operator. Then, when it reaches the heart, a contrast medium is injected into a medical tube. As a result, the contrast agent is supplied to the target part of the heart.
  • the present invention is not limited to the above-described cardiac catheters, and various medical tubes such as a drug injection catheter, a catheter with an electrode, a balloon catheter, an endoscope tube, and the like. Can be applied to the Alternatively, the present invention may be applied to a vasodilator, a puncture needle, an indwelling needle, and the like.
  • the material of the tube besides polymer materials such as urethane resin, vinyl chloride, nylon, polypropylene, and silicon resin, metals such as stainless steel and titanium, and shape memory alloys can be used. It is also possible to use wire mesh materials, various reinforcing wires, plastics reinforced with wire mesh materials, and the like.
  • the inner peripheral side and the outer peripheral side can be made of different materials.
  • a hard material such as a wire mesh or a mesh made of another material
  • Figs. 5 and 6 show examples of a tube in which the tube is formed by combining a plastic material and another material.
  • Fig. 5 shows a steel material 52 on the inner peripheral side and a plastic material layer 5 on the outer peripheral side W.
  • 3 shows a tube 51 constituted by 3.
  • the tube 54 has a two-layer structure of an inner plastic layer 55 and an outer plastic layer 56, and a mesh material 57 is sandwiched between them. In any case, it is possible to secure sufficient strength and flexibility in the short axis direction.
  • the above-mentioned tube may be subjected to some surface treatment depending on the application.
  • surface treatment include coating of a substance having an anticoagulant effect such as heparin or a substance having an antibacterial effect, chemical surface treatment such as chemical bonding of these materials by covalent bonding, etc.
  • chemical surface treatment such as chemical bonding of these materials by covalent bonding, etc.
  • Physical surface treatment for forming scratches, irregularities, grooves, spiral grooves, spiral convexes, minute projections, and the like.
  • FIG. 7 shows an example in which a spiral groove 59 is formed on the surface of a tube 58
  • FIG. 8 shows an example in which a so-called wart-like minute protrusion 61 is formed on the surface of the tube 60.
  • the cross-sectional shape of the medical tube of the present invention may be any shape as long as it is a flat shape, but is generally an elliptical shape as described in the previous embodiment.
  • an ellipse does not mean only an ellipse in the strict sense of having two focal points, but rather a minor axis diameter and a major axis. All of the different diameters are included.
  • the ratio of the short axis diameter to the long axis diameter is 10: 1 1 to 10:40.
  • a tube with a circular cross section may bend in any direction when the tube is pushed in, but a flat tube with the above-mentioned axial ratio has two short axis directions when the tube is pushed in. If you push it while twisting it at hand, you will proceed smoothly inside a complicated shaped vessel.
  • the above-mentioned tube having a flat cross section can be easily formed by, for example, forming the die into a flat shape (for example, an elliptical shape) in extrusion molding.
  • the shape of the tube is not limited to a shape in which the peripheral surface is smoothly continuous (for example, the elliptical shape), and may be a so-called tear shape in which one end on the long axis is formed at an acute angle.
  • the above-mentioned tube may be provided with various holes such as a hole for guiding water and air for various treatments, in addition to a hole for supplying medicine, a hole for passing water, air, various gases, and light. It is possible.
  • 9 to 14 show cross-sectional shapes of typical tubes to which the present invention is applied.
  • FIG. 9 shows an example of a tube 71 provided with two inner holes 72 and 73 having substantially equal opening diameters.
  • FIG. 10 shows an improved example of the tube shown in FIG. 9.
  • Fig. 11 shows a case where the main inner hole 82 is moved to one end on the long axis, and the other inner holes 83, 84 are arranged at the end on the long axis opposite to the inner hole 82. It is.
  • the tube 81 of this example is also one in which a plurality of inner holes are arranged on the long axis, but unlike the previous embodiment, it is not bilaterally symmetric.
  • FIGS. 12 and 13 show an example of a tube having a so-called tear-shaped cross-sectional shape, and FIG. 12 shows a tube 91 provided with only an inner hole 92 for supplying a chemical solution at a central portion thereof.
  • FIG. 13 shows an example in which an inner hole 93 for a plan or a treatment is provided in addition to the inner hole 92.
  • FIG. 14 shows an example in which the tube of the present invention is applied to an endoscope.
  • the objective lens 102 the light guides 103, 104, the air supply / water supply ports 105, and the suction along the long axis when viewed in cross section ⁇ Forceps ports 106 are arranged.
  • the various inner holes provided in the medical tube of the present invention do not necessarily need to be formed along the longitudinal direction of the tube from the beginning to the end of the tube. It may face the outer peripheral surface of. Further, various inner holes may be branched so that a part of the inner holes is opened to the outer peripheral surface of the tube.
  • the medical tube of the present invention may have a flat cross section from the beginning to the end, but also includes a tube in which only a part of the tube has a flat cross section.
  • the distal end side may have a flat cross-sectional shape, and the rearwardly continuous portion may have a circular cross-sectional shape.
  • the distal end may have a circular cross section, and the portion operated by hand may have a flat cross section.
  • the configuration may be such that the flat cross section and the circular cross section are alternately repeated.
  • the tube of the present invention can have a change in thickness, for example, by gradually narrowing the tip and making the other portions thicker than this. It is also possible to combine such changes in thickness.
  • the material of the tube may be uniform from the beginning to the end, or the material of the tube may be changed in the middle.

Landscapes

  • 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

Un tube à usage médical permet l'inspection, le diagnostic et le traitement d'une lésion située dans un vaisseau. Ce tube présente une section aplatie (ovale, par exemple), il est constitué d'une matière dure et donc résistante mais il offre une extrême souplesse. De plus, comme il ne se courbe facilement que dans une des directions correspondant à son axe transversal court, une intervention pratiquée localement par un utilisateur peut se répercuter avec précision à son extrémité distale. On peut créer dans ce tube plusieurs passages disposés sur sa longueur.
PCT/JP1993/000318 1992-03-19 1993-03-17 Tube a usage medical WO1993018813A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4/64014 1992-03-19
JP4064014A JPH11221286A (ja) 1992-03-19 1992-03-19 医療用チューブ

Publications (1)

Publication Number Publication Date
WO1993018813A1 true WO1993018813A1 (fr) 1993-09-30

Family

ID=13245897

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1993/000318 WO1993018813A1 (fr) 1992-03-19 1993-03-17 Tube a usage medical

Country Status (3)

Country Link
JP (1) JPH11221286A (fr)
AU (1) AU3766893A (fr)
WO (1) WO1993018813A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996020025A1 (fr) * 1994-12-27 1996-07-04 Advanced Cardiovascular Systems, Inc. Catheter possedant une section transversale oblongue et renforcee
NL1005219C2 (nl) * 1997-02-07 1998-08-10 Cordis Europ Katheter met onrond basislichaam.
US6027475A (en) * 1991-05-15 2000-02-22 Advanced Cardiovascular Systems, Inc. Catheter shaft with an oblong transverse cross-section
JP2006518606A (ja) * 2003-01-21 2006-08-17 セント ジュード メディカル ダイグ ディビジョン インコーポレイテッド 診断または処理されるべき組織に位置決めすることを容易にするカテーテル設計
US7118551B1 (en) 1999-12-22 2006-10-10 Advanced Cardiovascular Systems, Inc. Non-metal reinforcing mandrel
WO2010070685A1 (fr) * 2008-12-18 2010-06-24 Invatec S.P.A. Cathéter de guidage
GB2485563A (en) * 2010-11-18 2012-05-23 Cook Medical Technologies Llc Non-round introducer assembly
JP2013524943A (ja) * 2010-04-19 2013-06-20 ミクラス・エンドバスキュラー・エルエルシー 神経血管用途用の薄型誘導カテーテル
JP2015181486A (ja) * 2014-03-20 2015-10-22 テルモ株式会社 カテーテル
US10716912B2 (en) 2015-03-31 2020-07-21 Fisher & Paykel Healthcare Limited User interface and system for supplying gases to an airway
US11311664B1 (en) 2021-04-12 2022-04-26 Denicia Dread Rankin Shapeable intravenous tubing
US11324908B2 (en) 2016-08-11 2022-05-10 Fisher & Paykel Healthcare Limited Collapsible conduit, patient interface and headgear connector
CN114828934A (zh) * 2019-11-20 2022-07-29 米德尔顿医疗创新有限公司 可主动偏转的尿导管

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014049776A1 (fr) * 2012-09-27 2014-04-03 テルモ株式会社 Cathéter
CN111356421A (zh) 2017-11-24 2020-06-30 有限会社Ptmc研究所 人造血管输送装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61100258A (ja) * 1984-10-24 1986-05-19 テルモ株式会社 医療用チユ−ブおよびその製造方法
JPH0119961Y2 (fr) * 1981-12-21 1989-06-09
JPH03198868A (ja) * 1989-12-27 1991-08-30 Terumo Corp 血管造影用カテーテル

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0119961Y2 (fr) * 1981-12-21 1989-06-09
JPS61100258A (ja) * 1984-10-24 1986-05-19 テルモ株式会社 医療用チユ−ブおよびその製造方法
JPH03198868A (ja) * 1989-12-27 1991-08-30 Terumo Corp 血管造影用カテーテル

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6027475A (en) * 1991-05-15 2000-02-22 Advanced Cardiovascular Systems, Inc. Catheter shaft with an oblong transverse cross-section
WO1996020025A1 (fr) * 1994-12-27 1996-07-04 Advanced Cardiovascular Systems, Inc. Catheter possedant une section transversale oblongue et renforcee
US5868706A (en) * 1994-12-27 1999-02-09 Advanced Cardiovascular Systems, Inc. Catheter with reinforced oblong transverse cross section
NL1005219C2 (nl) * 1997-02-07 1998-08-10 Cordis Europ Katheter met onrond basislichaam.
US7118551B1 (en) 1999-12-22 2006-10-10 Advanced Cardiovascular Systems, Inc. Non-metal reinforcing mandrel
JP2006518606A (ja) * 2003-01-21 2006-08-17 セント ジュード メディカル ダイグ ディビジョン インコーポレイテッド 診断または処理されるべき組織に位置決めすることを容易にするカテーテル設計
WO2010070685A1 (fr) * 2008-12-18 2010-06-24 Invatec S.P.A. Cathéter de guidage
JP2013524943A (ja) * 2010-04-19 2013-06-20 ミクラス・エンドバスキュラー・エルエルシー 神経血管用途用の薄型誘導カテーテル
GB2485563B (en) * 2010-11-18 2013-01-30 Cook Medical Technologies Llc Introducer assembly and sheath therefor
GB2485563A (en) * 2010-11-18 2012-05-23 Cook Medical Technologies Llc Non-round introducer assembly
JP2015181486A (ja) * 2014-03-20 2015-10-22 テルモ株式会社 カテーテル
US10716912B2 (en) 2015-03-31 2020-07-21 Fisher & Paykel Healthcare Limited User interface and system for supplying gases to an airway
US11904097B2 (en) 2015-03-31 2024-02-20 Fisher & Paykel Healthcare Limited User interface and system for supplying gases to an airway
US12171946B2 (en) 2015-03-31 2024-12-24 Fisher & Paykel Healthcare Limited User interface and system for supplying gases to an airway
US11324908B2 (en) 2016-08-11 2022-05-10 Fisher & Paykel Healthcare Limited Collapsible conduit, patient interface and headgear connector
CN114828934A (zh) * 2019-11-20 2022-07-29 米德尔顿医疗创新有限公司 可主动偏转的尿导管
EP4061465A4 (fr) * 2019-11-20 2024-03-13 Middleton Medical Innovations Pty Ltd Cathéter urinaire pouvant être activement dévié
US11311664B1 (en) 2021-04-12 2022-04-26 Denicia Dread Rankin Shapeable intravenous tubing

Also Published As

Publication number Publication date
JPH11221286A (ja) 1999-08-17
AU3766893A (en) 1993-10-21

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