JP2000237216A - Multibranch artificial blood vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten an operation period of time, and reduce an invasion to a patient by providing one branch tube within a specified mm from the branched section by branching, on a pair of branch tubes which are provided by branching a main stem section, respectively. SOLUTION: A main stem section 2 is branched at a branching section 7 into a branch tube A3 and a branch tube B4, and in addition, a branch tube C5 is provided at a location of a length L1 from the branched section 7 of the branch tube A3, and a branch tube D6 is provided at a location of a length L2 from the branched section 7 of the branch tube A3 by branching. The lengths L1 and L2 are set at 5-50 mm. The branch tubes A3 and B4 are respectively branched from the main stem section 2 at angles θ1 and θ2, and an angle θ3 between both branch tubes is set in a range of 0-120 deg.. Also, respective angles θ4 and θ5 between the branch tube C5 and the branch tube A3, and between the branch tube D6 and the branch tube B4, are set in a range of 5-90 deg.. The angles θ1 and θ2 are preferably set in a range of approx. 0-60 deg.. By this constitution, an operation period of time can be shortened, and an invasion to a patient can be reduced as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an artificial blood vessel. The present invention relates to an artificial blood vessel mainly used for artificial blood vessel transplantation from the abdominal aorta to the common iliac artery.

[0002]

Most abdominal aortic aneurysms occur peripherally to the renal arteries. Resection and artificial blood vessel transplantation are the basic surgical procedures. The artificial blood vessel used is
In many cases, the common iliac artery also has a disease, and a Y-shaped artificial blood vessel is applied. Sometimes a straight pipe is used.

When performing an artificial blood vessel transplantation from the abdominal aorta to the common iliac artery, a Y-shaped artificial blood vessel is used. At this time, if necessary, the operator may perform processing at the operating site to further branch the limb of the Y-shaped artificial blood vessel. It is an object of the present invention to provide a multi-limbed artificial blood vessel that can shorten the operation time and reduce invasion to a patient by previously branching the limb of the Y-shaped artificial blood vessel to provide a limb.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a main trunk having an end and two limb tubes (limb tube A and limb tube B), each of which has a lumen communicating therewith and branched, are integrally formed. The branch pipe A has one limb canal (limb canal C) having a lumen communicating therewith and branched from the limb canal A, and the limb canal B has a lumen communicating therewith and has a limb canal B formed therein. One branched limb canal (limb canal D)
A limb canal C having a limb canal C between 5 and 50 mm from the branch between the main trunk and the limb canal A, and a limb canal D having a limb canal 5-5 mm from the branch between the main trunk and the limb canal B The present invention relates to a multilimbed artificial blood vessel characterized in that it is branched between the two.

More preferably, in the present invention, the limb canal A and the limb canal B are branched at an angle of 0 to 120 °, and the limb canal C is connected to the limb canal A.
The limb canal D is branched at an angle of 5 to 90 ° with respect to the length direction of the limb canal B at an angle of 5 to 90 ° with respect to the end length direction of the limb canal. It relates to a multi-limbed artificial blood vessel.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A multilimbed artificial blood vessel according to the present invention comprises a main tube portion having an end portion and two branched limb tubes (limb tube A and limb tube B) whose inner lumen communicates and branches. The limb canal A has one limb canal (limb canal C) with which the lumen communicates and branches off with the limb canal A, and the limb canal B communicates with the lumen and has a limb. A multilimbed artificial blood vessel having one limb canal (limb canal D) branched from the canal B, wherein the limb canal C is 5 to 50 mm from the bifurcation of the main trunk and the limb canal A, and further 5 to 40 m
m, especially between 10 and 30 mm, the limb canal D is 5 to 50 mm from the bifurcation of the main trunk and the limb canal B, further 5 to 40 mm,
In particular, it is a multi-limbed artificial blood vessel that is branched between 10 and 30 mm.

Further, the multilimbed artificial blood vessel according to the present invention has a limb canal A
And the limb canal B are 0 to 120 °, further 0.1 to 120 °,
In particular, the limb canal C is branched at an angle (θ3) of 2 to 100 °, and the limb canal C is formed at an angle of 5 to 90 °, more preferably at an angle of 10 to 70, particularly at an angle of 20 to 60 with respect to the longitudinal direction of the end of the limb canal A Bifurcated, the limb canal D is at an angle of 5 to 90 ° with respect to the limb canal B end length direction,
Further, it is preferable that the branching is performed at an angle of 10 to 70, particularly at an angle of 20 to 60.

Further, the multilimbed artificial blood vessel according to the present invention has a limb canal A
And the limb canal B are 0 to 120 °, further 0.1 to 120 °,
In particular, the limb canal A branches at an angle of 2 to 100 ° (θ3), and the limb canal A is 0 to 60 °, particularly 1
Branch at an angle (θ1) of 50 °, and the limb canal A is from 0 to 60 °, particularly 1 to 50 °, from the end of the main tube to the branch direction.
Limb canal C, limb canal C branches off at an angle of 5 to 90 ° with respect to the longitudinal direction of the end of limb canal A, and limb canal D limb canal B
It is preferable to branch at an angle of 5 to 90 ° with respect to the end length direction.

In the multi-limbed artificial blood vessel of the present invention, the inner diameter (d) of the main trunk is in the range of 12 to 30 mm, and the inner diameter (da) of the branch pipe A.
Is in the range of 6 to 17 mm, and the inner diameter (db) of the branch pipe B is 6 to
17mm range, inner diameter (dc) of branch pipe C is 4 ~ 17mm
And the inner diameter (dd) of the branch pipe D is preferably in the range of 4 to 17 mm.

In particular, the multi-limbed artificial blood vessel of the present invention has an inner diameter (d) of a main trunk, an inner diameter (da) of a limb tube A, and an inner diameter (d) of a limb tube B.
b), the inner diameter of the limb canal C (dc) and the inner diameter of the limb canal D (d
and d) preferably have the relationship of general formulas (1) to (4).

(Equation 1)

The inner diameter of the multi-limbed artificial blood vessel of the present invention is the diameter of the valley of the crimp portion inside the blood vessel when the artificial blood vessel to be used has a fold such as crimping.

In the multi-limbed artificial blood vessel of the present invention, a tapered or non-tapered tube can be used for the main trunk and limb tubes A to D.

The multi-limbed artificial blood vessel of the present invention can be applied to an artificial blood vessel made of any material, such as an artificial blood vessel made of polyester artificial blood vessel stretched and focused resin.

The multi-limbed artificial blood vessel of the present invention can be applied to a modified artificial blood vessel, that is, a so-called zero-porosity artificial blood vessel which is treated with gelatin or collagen to prevent plasma leakage.

As the multi-limbed artificial blood vessel of the present invention, an artificial blood vessel made of a tubular woven or knitted fabric such as plain weave or twill weave of a thermoplastic resin fiber can be used.

Examples of the thermoplastic resin forming the thermoplastic resin fiber include polyolefins such as polyethylene, polypropylene, ethylene-α-olefin copolymer, polyamide, polyurethane, polyethylene terephthalate, polybutylene terephthalate, polycyclohexane terephthalate, and polyethylene- Examples include polyesters such as 2,6-naphthalate and fluororesins such as PTFE and ETFE. More preferably, PTF is chemically stable, has high durability, and has little tissue reaction.
Preferred are fluororesins such as E and ETFE, and polyesters such as polyethylene terephthalate, which are chemically stable, have high durability, have little tissue reaction, and have excellent mechanical properties such as tensile strength. Particularly preferably, polyester such as polyethylene terephthalate having a glass transition temperature of 60 ° C. or higher is preferable because the strength of the polyester resin may be reduced by body temperature.

[0017] The thermoplastic resin fiber may be 0.1 to
5 denier, more preferably 0.5 to 3 denier, especially the number of monofilaments to several hundreds of more than 0.8 and 3 denier or less,
Further, 10 to 700, especially 10 to 100 twisted yarns are preferred.

The thermoplastic resin fiber may be coated with an antithrombotic material, for example, heparin, collagen, acetylsalicylic acid, gelatin or the like.

As the multi-limbed artificial blood vessel of the present invention, a processed artificial blood vessel such as crimping can be used.

For the crimping, a method of processing the surface of a tubular woven or knitted fabric made of a thermoplastic resin fiber into an uneven shape can be used. For example, US Pat.
No. 3,376,733, that is, a tube-shaped woven or knitted fabric is fitted on the surface of a round bar, a yarn is spirally wound at equal intervals from above the tube, and the tube is compressed and shrunk in the axial direction as it is. And heat setting by heating. The method described in Japanese Patent Application Laid-Open No. 1-155860, that is, a tubular woven or knitted fabric is fitted into a threaded rod having a sufficiently polished surface, an appropriate thread is wound along a thread groove, and heat treatment is performed as it is. It is preferable to use a heat setting method.

As the tubular woven or knitted fabric, preferably, one obtained by plain weaving a thermoplastic resin fiber into a tubular shape as a warp and a weft can be used. Particularly preferably, the wall thickness is 0.1 mm or less, and the porosity is 2000 ml /.
(Cm ² · min · 120 mmHg) or less can be used.

Embodiments of the present invention will be described below in detail with reference to the drawings. The present invention is not limited only to these embodiments.

FIG. 1 is a perspective view showing an example of the multi-limbed artificial blood vessel according to the present invention. The multilimbed artificial blood vessel 1 includes a main trunk 2, a limb tube A3 and a limb tube B4 branching from the main trunk, and a limb tube C5 branching from the limb tube A and a limb tube D6 branching from the limb tube B. And Limb canal A and limb canal B
Branching off from the main manager 2. The limb canal C5 branches off from the limb canal A3 at a distance L1 from the branch between the main trunk 2 and the limb canal A3. The limb canal D6 branches off from the limb canal B4 at a distance L2 from the branch between the main trunk 2 and the limb canal B4.
The limb canal A and the limb canal B are branched at an angle θ3. Limb tube A
Is branched from the main trunk at an angle θ1, and the limb canal B is branched from the main trunk at an angle θ2. The limb tube C branches at an angle θ4 with respect to the end direction of the limb tube A, and the limb tube D branches at an angle θ5 with respect to the end direction of the limb tube B. The lengths L1 and L2 are 5
The angle θ3 is in the range of 0 to 120 °, and the angles θ4 and θ5 are in the range of 5 to 90 °. Further, each of the angles θ1 and θ2 is preferably in the range of 0 to 60 °. θ1 indicates a branch angle with respect to the limb canal A from the end of the main pipe to the branch 7, and θ2 indicates a branch angle with the limb canal B from the end of the main pipe to the branch 7.

FIG. 2 is a longitudinal sectional view taken along the line VV of FIG.

FIG. 3 is a longitudinal sectional view of another multilimbed artificial blood vessel from the main tube portion side. The multilimbed artificial blood vessel 11 includes a main trunk 12, a limb canal A13 and a limb canal B14 branching from the main trunk.
Further, it has a limb tube C15 branching from the limb tube A and a limb tube D16 branching from the branch tube B.

FIG. 4 is a longitudinal sectional view of another multilimbed artificial blood vessel from the main tube side. The multi-limbed artificial blood vessel 21 includes a main trunk 22, a limb canal A23 and a limb canal B24 branching from the main trunk.
Further, it has a limb tube C25 branching from the limb tube A and a limb tube D26 branching from the branch tube B.

[0027]

According to the multilimbed artificial blood vessel of the present invention, the limb of the Y-shaped artificial blood vessel is further branched to provide a limb.
The operation time can be shortened and the invasion to the patient can be reduced.

The multi-limbed artificial blood vessel of the present invention comprises a limb canal C and a limb canal D
However, the blood flow can be prevented from being disturbed by being located at a distance of 5 mm or more from the branch portion between the main trunk and the limb tubes A and B.

[Brief description of the drawings]

FIG. 1 is a perspective view of an example of a multilimbed artificial blood vessel according to the present invention.

FIG. 2 is a longitudinal sectional view taken along line VV of FIG.

FIG. 3 is a longitudinal sectional view of another example of the multi-limbed artificial blood vessel of the present invention, as seen from the main trunk side.

FIG. 4 is a longitudinal sectional view of another example of the multi-limbed artificial blood vessel of the present invention, as viewed from the main trunk side.

[Explanation of symbols]

 1,11,21 Multi-limb artificial blood vessel, 2,12,22 Main trunk, 3,13,23 Limb tube A, 4,14,24 Limb tube B, 5,15,25 Limb tube C, 6,16,26 Limb canal D

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Ikeda 8-1, Goi south coast, Ichihara City, Chiba Prefecture Ube Industries, Ltd. Polymer Research Laboratory F-term (reference)

Claims (2)

[Claims] 1. A main trunk having an end, and two limb canals (limb canal A and limb canal B), each of which has a lumen communicating therewith and is branched, are integrally formed. The limb canal has a single limb canal (limb canal C) communicating with the lumen and branching off from the limb canal A. The limb canal B has one limb canal (limb canal having the lumen communicating therewith and branching off with the limb canal B). A multi-limbed artificial blood vessel having a tube D), wherein the limb tube C is 5 to 50 m from a branch portion between the main trunk and the limb tube A
m, the limb canal D is 5 to 5 m from the branch between the main trunk and the limb canal B.
A multi-limbed artificial blood vessel characterized by branching between 50 mm. 2. The limb canal A and the limb canal B are branched at an angle of 0 to 120 °, and the limb canal C is 5 to 9 with respect to the longitudinal direction of the end of the limb canal A.
The multilimbed artificial blood vessel according to claim 1, wherein the limb canal D branches at an angle of 0 ° and the limb canal D branches at an angle of 5 to 90 ° with respect to the length direction of the end of the limb canal B.