CN109893293B

CN109893293B - Artificial blood vessel

Info

Publication number: CN109893293B
Application number: CN201910177069.4A
Authority: CN
Inventors: 孟国伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-08
Filing date: 2019-03-08
Publication date: 2021-08-31
Anticipated expiration: 2039-03-08
Also published as: CN109893293A

Abstract

The invention relates to an artificial blood vessel, which belongs to the technical field of medical equipment and comprises an outer blood vessel, wherein the inner blood vessel is nested in the outer blood vessel, the inner wall of the outer blood vessel is provided with a joint connected with the inner blood vessel, and the joint is connected with one end or the middle of the inner blood vessel; the invention is through nesting the inner layer blood vessel connected with its inner wall in the outer layer blood vessel, link the outer layer blood vessel when connecting the artificial blood vessel, the length of the inner layer blood vessel is greater than the length of the outer layer blood vessel used for anastomosing, namely the length of the inner layer blood vessel surpasses the anastomotic stoma; when blood flows through the inner layer blood vessel, the pressure of the blood flow makes the inner layer blood vessel stick to the anastomotic stoma, and plays the roles of closing, isolating and pressing the anastomotic stoma and the suture needle eye, thereby achieving the effect of preventing the bleeding of the anastomotic stoma and the suture needle eye and being safer and more convenient to use.

Description

Artificial blood vessel

Technical Field

The invention relates to the technical field of medical equipment, in particular to an artificial blood vessel.

Background

Vascular prostheses are common vascular replacement or repair materials used in vascular and cardiac surgery. When the existing artificial blood vessel is replaced, if the blood vessel has an interlayer or the blood vessel wall has serious sclerosis, calcification and other lesions, the anastomotic stoma and the suture needle eye often have serious bleeding, the prior art adopts the measures of needle suture, blood vessel external compression, hemostatic materials, hemostatic medicines or blood products and the like to stop bleeding, and the hemostatic effect is poor.

Disclosure of Invention

The present invention is directed to an artificial blood vessel to solve the problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

an artificial blood vessel comprises an outer layer blood vessel, wherein an inner layer blood vessel is nested in the outer layer blood vessel, and the inner wall of the outer layer blood vessel is provided with a joint connected with the inner layer blood vessel.

As a further technical scheme of the invention: the junction is connected with one end of the inner vessel.

As a further technical scheme of the invention: the length of the inner layer blood vessel is larger than that of the outer layer blood vessel used for anastomosis, namely the length of the inner layer blood vessel exceeds the anastomosis opening.

As a further technical scheme of the invention: the diameter of the inner layer blood vessel is smaller than that of the outer layer blood vessel, and the outer diameter of the inner layer blood vessel is approximately equal to the inner diameter of the outer layer blood vessel.

As a further technical scheme of the invention: the outer layer of the blood vessel is made of a biocompatible material.

As a further technical scheme of the invention: the inner layer blood vessel is made of a biocompatible material.

As a further technical scheme of the invention: the biocompatible material comprises polyurethane.

As a further technical scheme of the invention: the junction is connected to the middle of the inner vessel.

Compared with the prior art, the invention has the beneficial effects that: through the inner layer blood vessel that links to each other rather than the inner wall of nested in outer layer blood vessel, link to each other outer layer blood vessel when connecting artificial blood vessel, inner layer blood vessel length surpasss the anastomotic stoma, and when blood flowed through inner layer blood vessel, blood flow pressure makes inner layer blood vessel paste to anastomotic stoma, plays seal, isolation, oppression effect to anastomotic stoma and suture needle eye to reach the effect that prevents anastomotic stoma and suture needle eye from bleeding, it is safer convenient during the use.

Drawings

FIG. 1 is a schematic structural view of a vascular prosthesis;

FIG. 2 is a schematic structural view of the artificial blood vessel before anastomosis;

FIG. 3 is a schematic view of the structure in anastomosis of artificial blood vessels;

FIG. 4 is a schematic view of the structure of the anastomosed artificial blood vessel;

fig. 5 is another structural diagram of the artificial blood vessel.

In the figure: 1-outer layer blood vessel, 2-inner layer blood vessel, 3-junction.

Detailed Description

In the description of the present invention, it is to be understood that the terms "intermediate," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be connected by weaving and sewing or can be connected mechanically; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

The artificial blood vessel shown in fig. 1-4 comprises an outer layer blood vessel 1, an inner layer blood vessel 2 is nested in the outer layer blood vessel 1, a joint 3 connected with the inner layer blood vessel 2 is arranged on the inner wall of the outer layer blood vessel 1, the outer layer blood vessel 1 and the inner layer blood vessel 2 are nested, when the artificial blood vessel is replaced or connected, the outer layer blood vessel 1 is anastomosed with the autologous blood vessel or other artificial blood vessels, namely, the suture is sewed on the outer layer blood vessel 1, while the length of the inner layer blood vessel 2 exceeds the anastomotic stoma, because the inner layer blood vessel 2 is connected with the outer layer blood vessel 1 through the connecting part 3, when blood flows through the inner layer blood vessel 2, the blood flows from the inner layer blood vessel 2, the inner layer blood vessel 2 is attached to the anastomotic stoma under the action of blood flow pressure, the utility model has the advantages of playing the effect of sealing, isolating and compressing the anastomotic stoma and the suture needle eye, thereby achieving the effect of preventing the bleeding of the anastomotic stoma and the suture needle eye.

The junction 3 is connected with one end of the inner layer blood vessel 2, one end of the inner layer blood vessel 2 is connected with the outer layer blood vessel 1, and other parts are separated from the outer layer blood vessel 1, so that the outer layer blood vessel 1 is convenient to coincide with an autologous blood vessel or an artificial blood vessel, the inner layer blood vessel 2 can be fixed, blood flow is guided to pass through the inner layer blood vessel 2, the inner layer blood vessel 2 is attached to an anastomotic stoma, and the anastomotic stoma and a suture needle eye are sealed, isolated and pressed, so that the purpose of stopping bleeding is achieved.

The length of the inner layer blood vessel 2 is larger than that of the outer layer blood vessel 1 used for anastomosis, namely the length of the inner layer blood vessel 2 exceeds that of the anastomosis opening, and the length of the inner layer blood vessel 2 is larger than that of the outer layer blood vessel 1 at the anastomosis end, so that the inner layer blood vessel 2 can completely seal the anastomosis opening after the outer layer blood vessel 1 is anastomosed.

The diameter of the inner layer blood vessel 2 is smaller than that of the outer layer blood vessel 1, the outer diameter of the inner layer blood vessel 2 is approximately equal to the inner diameter of the outer layer blood vessel 1, and the purpose is to enable the inner layer blood vessel 2 to be tightly attached to the outer layer blood vessel 1.

The outer layer blood vessel 1 and the inner layer blood vessel 2 are both made of biocompatible materials, and comprise any one of polyurethane and expanded polytetrafluoroethylene, and the polyurethane and the expanded polytetrafluoroethylene not only meet the requirement of mechanical property, but also have good compatibility and are not easy to generate rejection reaction.

Example 2

As shown in fig. 5, the present embodiment is different from embodiment 1 in that the junction 3 is connected to the middle of the inner vessel 2, and both ends of the outer vessel 1 can be anastomosed.

The artificial blood vessel of the present invention can also be cut into double-layer patches, and can be used as a defect repair material for blood vessels, etc., for example, for replacing or repairing the aortic sinus (e.g., DAVID operation).

The working principle is as follows: when the artificial blood vessel is replaced or connected, the outer layer blood vessel 1 is anastomosed with the autologous blood vessel or other artificial blood vessels, namely the outer layer blood vessel 1 is sutured by using a suture, and the length of the inner layer blood vessel exceeds the anastomotic stoma. Because the inner layer blood vessel 2 is connected with the outer layer blood vessel 1 through the connecting part 3, blood flows from the inner layer blood vessel 2, the inner layer blood vessel 2 is attached to the anastomotic stoma under the action of blood flow pressure, and the anastomotic stoma and the suture needle eye are sealed, isolated and pressed, so that the effect of preventing the hemorrhage of the anastomotic stoma is achieved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An artificial blood vessel comprising an outer vessel (1), characterized in that: the inner layer blood vessel (2) is nested in the outer layer blood vessel (1), and the inner wall of the outer layer blood vessel (1) is provided with a connecting part (3) connected with the inner layer blood vessel (2); the joint (3) is connected with one end of the inner layer blood vessel (2); anastomosing the outer layer blood vessel (1) with an autologous blood vessel or other artificial blood vessels, wherein the length of the inner layer blood vessel (2) exceeds the anastomotic stoma; the outer diameter of the inner layer blood vessel (2) is approximately equal to the inner diameter of the outer layer blood vessel (1) so as to ensure that the inner layer blood vessel (2) is tightly attached to the outer layer blood vessel (1); the blood flow is guided to pass through the inner layer blood vessel (2), so that the inner layer blood vessel (2) is attached to the anastomotic stoma to seal and press the anastomotic stoma and the suture needle eye, thereby achieving the purpose of hemostasis.