JP2003019137A - Blood vessel joining tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blood vessel joining tool easy in joining a bio blood vessel with an artificial blood Bessel, and capable of coping with all transplantation lengths and anastomotic types. SOLUTION: This blood vessel joining tool 1 is composed of a tubular body part 2, a first joining part (a flange part) 3 arranged on one end side of the body part 2, and joined to the bio blood vessel 10, and a second joining part (a cylindrical part) 4 arranged on the other end side of the body part 2, and joined to the artificial blood vessel 11. The first joining part 3 forms a tapered shape with gradually increasing outer diameter toward the tip. The second joining part 4 diametrally expands to the body part 2. Thus, when joining the artificial blood vessel 1 to the second joining part 4, an inner diameter of the artificial blood vessel 11 and an inner diameter of the body part 2 become substantially equal to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood vessel connector for joining a living blood vessel and an artificial blood vessel.

[0002]

2. Description of the Related Art Surgery for replacing a part of a living blood vessel with an artificial blood vessel, that is, transplantation operation of an artificial blood vessel is performed.

In this operation, an artificial blood vessel is anastomosed to a living blood vessel, but a flange structure is formed at one end of the artificial blood vessel for the purpose of improving the hemodynamics of the anastomosis portion, facilitating the inversion, and facilitating the anastomosis. An artificial blood vessel having the following has been developed.

However, the transplantation length of the artificial blood vessel varies depending on the case and the procedure, so that the flange structure is
It could be formed only on one end of the artificial blood vessel.

The following is known as a joining system for connecting artificial blood vessels. A hollow body made of synthetic resin, in which the artificial blood vessel connecting portion is made of a tubular nonporous material, a thick portion is provided in the central portion, and the living blood vessel connecting portion is made of a porous material (JP-A-6-319755). Hollow body made of a corrosion-resistant metal material having holes (Japanese Patent Laid-Open No. 11-113937)

However, these connecting devices are designed to be inserted into a living blood vessel and an artificial blood vessel, respectively, and a step is formed on the inner surface of the connecting device due to the difference in inner diameter between the living blood vessel and the artificial blood vessel. .

Further, these connecting devices can be used in the case of anastomosis (end-to-end anastomosis) between an end portion of an artificial blood vessel and an end portion of a living blood vessel, but a general operation method for anastomosis in a peripheral blood vessel. It cannot be used when an anastomosis (end-side anastomosis) of the artificial blood vessel is performed on the side surface of the living blood vessel, which has a problem that an anastomosis operation method is selected.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a blood vessel connector which can be easily joined to a living blood vessel or an artificial blood vessel and can be used for all implant lengths and anastomosis procedures.

[0009]

The above objects are achieved by the present invention described in (1) to (12) below.

(1) A tubular body portion, a first joint portion provided on one end side of the body portion and joined to a living blood vessel, and a first joint portion provided on the other end side of the body portion and joined to an artificial blood vessel. A blood vessel connector having two joint portions, wherein the first joint portion is constituted by a flange portion projecting outward.

(2) The blood vessel connector according to (1), wherein the flange portion has flexibility.

(3) The blood vessel connector according to (1) or (2), wherein the flange portion is made of a porous material.

(4) The blood vessel connector according to any one of the above (1) to (3), wherein the flange portion has a taper shape whose outer diameter changes along the tube axis direction.

(5) The taper angle of the flange is
The blood vessel connector according to (4) above, which changes along the circumferential direction.

(6) The blood vessel connector according to any one of the above (1) to (5), wherein the flange portion is formed with a small hole penetrating the flange portion.

(7) The blood vessel joint according to any one of the above (1) to (6), wherein the second joint portion is expanded in diameter with respect to the main body portion, and an artificial blood vessel is inserted into and connected to the inner cavity thereof. Ingredient

(8) The blood vessel connector according to (7), wherein when an artificial blood vessel is joined to the second joint portion, the inner diameter of the artificial blood vessel and the inner diameter of the main body portion are substantially equal to each other.

(9) The blood vessel connector according to any one of the above (1) to (8), wherein at least the inner surface of the second joint portion is made of a material capable of being fused with the artificial blood vessel.

(10) The blood vessel connector according to any one of the above (1) to (8), which has an adhesive layer on the inner surface of the second joint.

(11) The blood vessel connector according to any one of the above (1) to (10), wherein the second joint portion has fixing means for fixing or assisting the connected artificial blood vessel.

(12) The blood vessel connector according to (11) above, wherein the fixing means is a plurality of protrusions that engage with the artificial blood vessel.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION The blood vessel connector of the present invention will be described below in detail with reference to the preferred embodiments shown in the accompanying drawings.

FIG. 1 is a longitudinal sectional view showing a first embodiment of the blood vessel connector of the present invention, and FIG. 2 is a first section of the blood vessel connector of the present invention.
FIG. 3 is an enlarged vertical sectional view showing the joint portion, and FIG. 3 is an enlarged longitudinal sectional view showing the second joint portion of the blood vessel connector of the present invention. In the following description, the left side in FIGS. 1 to 3 is “one end”,
The right side is called the "other end".

The blood vessel connector 1 shown in FIG. 1 has a tubular main body portion 2, a first joint portion (flange portion) 3 provided on one end side of the main body portion 2 and joined to a living blood vessel 10, and a main body portion. The second joint portion (cylindrical portion) 4 is provided on the other end side of the second joint portion 2 and is joined to the artificial blood vessel 11. Furthermore, the main body 2 is
It is also possible to make an angle with respect to the first joint portion 3 and to make an anastomosis with the living blood vessel 10 (see FIG. 5).

The main body 2 is composed of a tubular body, and its length is, for example, about 10 to 50 mm.

The inner diameter of the main body 2 is not particularly limited, but can be, for example, about 3 to 8 mm.

The main body 2 may be made of a rigid material or a flexible material, but the latter is preferable.

The first joint 3 is joined (anastomosis) to a living blood vessel.
This is a part that is formed by a flange portion that projects outwards over the entire circumference.

The first joint portion 3 preferably has flexibility (flexibility, elasticity). It may also be made of a porous material. The first joint portion 3 is flexible (flexibility,
Since it is made of a material having elasticity) or a porous material, a living blood vessel 1 is formed by using a clip 12 described later.
When joining with 0, the end of the clip 12 bites into the first joining portion 3 appropriately, so that more appropriate and high-strength joining is possible.

Specific examples of such a material include stretched polytetrafluoroethylene, polyester knitted fabric or woven fabric, non-woven fabric using olefin resin,
Examples of the foam include polyurethane foam.

The first joint portion (flange portion) 3 is tapered so that the outer diameter thereof gradually increases toward the tip (one end) in the pipe axis direction. That is, the straight tubular body portion 3
It exerts the same function as if one end of the is inverted (expanded). As a result, the other end of the living blood vessel 10 (the everted portion 10
The joining with 1) can be performed more easily and reliably.

The taper angle θ of the first joint portion (flange portion) 3 is not particularly limited, but is preferably about 15 to 165 °. The taper angle θ may vary along the circumferential direction of the first joint portion 3 (see FIG. 5), and in that case, the value of θ represents an average value.

The thickness (plate thickness) of the first joint portion (flange portion) 3 is not particularly limited, but is preferably 1 mm or less.

Further, as shown in FIG. 2, the first joint portion (flange portion) 3 may be formed with a small hole 31 penetrating through the flange portion.

The small hole 31 is used, for example, as a hole through which a suture is passed when the other end (outer portion 101) of the living blood vessel 10 and the first joint 3 are joined by suturing, as will be described later. To be

In addition, the other end portion of the living blood vessel 10 (outer portion 1)
01) and the first joint portion 3 are joined by the clip 12, it can also be used as a hole through which a guide thread used for temporary fixing is passed.

The number of small holes 31 formed may be one, but it is preferably plural. When forming a plurality of small holes 31, it is preferred that they are formed at equal intervals along the outer periphery of the first joint portion (flange portion) 3.

The second joint portion 4 is composed of a tubular portion having a tubular shape (tubular shape), and the artificial blood vessel 11 is placed in the inner cavity of the tubular portion.
Insert one end of and connect. The second joint portion (cylindrical portion) 4 has a diameter larger than that of the main body portion 2. The degree of this diameter expansion is not particularly limited, but when the artificial blood vessel 11 is joined to the second joint portion 4 as shown in FIG.
It is preferable that the inner diameter of the body 2 be substantially equal to the inner diameter of the main body 2.

That is, it is preferable that the inner diameter of the second joint portion (cylindrical portion) 4 is set to a dimension of the inner diameter of the main body portion 2 plus twice the thickness of the wall of the artificial blood vessel 11. As a result, the inner surface of the artificial blood vessel 11 and the inner surface of the main body 2 are continuous,
Since no step is formed at the boundary (or even if a step is formed), it is possible to prevent turbulence in blood flow and thrombus formation at this part, and to secure a more ideal blood flow. can do.

The artificial blood vessel 11 to be joined to the second joining portion 4 is not particularly limited, but examples thereof include those made of materials such as polytetrafluoroethylene, polyester (Dacron) and polyurethane. .

The second joint 4 and the artificial blood vessel 11 are usually
It can be fixed by various methods such as fusion (heat fusion, ultrasonic fusion, high-frequency fusion, etc.), adhesion with an adhesive, stitching, and fixation with a clip.

When the second joint portion 4 and the artificial blood vessel 11 are fixed by fusion bonding, at least the inner surface of the second joint portion 4 (second
It is preferable that the entire joint portion 4) be made of a material that can be fused with the artificial blood vessel 11, particularly a material that can be heat-fused. Examples of such a material include polyolefin resin and vinyl resin. In particular, this material preferably has a melting point of 150 ° C or lower, and
More preferably, it is about 0 to 120 ° C.

In order to realize such a structure, for example, as shown in FIG. 3, an inner layer 41 is provided on the inner surface of the second joint portion 4, and the inner layer (fusion layer) 41 is made of the above-mentioned material. You can

When the second joint portion 4 and the artificial blood vessel 11 are fixed by adhesion, an inner layer (adhesive layer) 41 is provided on the inner surface of the second joint portion 4 as shown in FIG. May be composed of an adhesive.

Examples of the adhesive constituting the inner layer 41 include silicone-based, rubber-based, acrylic-based, and urethane-based adhesives. Among them, silicone-based adhesives and urethane-based resins are particularly preferable.

Inner layer (fusion layer, adhesive layer) 4 as described above
By providing 1, the joint strength between the second joint portion 4 and the artificial blood vessel 11 can be further increased, and the liquid tightness (sealing property) of the joint portion is also improved.

The blood vessel connector 1 shown in the figure has a single-layer structure, but is not limited to this and may be composed of a laminated body in which a plurality of layers are laminated. For example, inner layer, middle layer, outer layer
It may have a layered structure.

Next, an example of a joining method using the blood vessel joining device 1 will be described. First, the length of the artificial blood vessel 11 to be used is determined. For example, when the length of the artificial blood vessel 11 is set to 12 cm, a longer artificial blood vessel is cut into a length of 12 cm to produce the artificial blood vessel.

Next, the second joint portion 4 of the blood vessel connector 1 is joined to the end portion of the artificial blood vessel 11 by the method described above. In this case, the blood vessel connector 1 is preferably joined to both ends of the artificial blood vessel 11.

Second joint 4 of blood vessel connector 1 and artificial blood vessel 1
In the case of joining the end portion of No. 1 and the end portion of No. 1 by, for example, heat fusion, the end portion of the artificial blood vessel 11 is inserted into the inner cavity of the second joining portion 4, and a core rod (not shown) is further inserted into them A ring-shaped heater (not shown) is attached to the outside of the second joint portion 4, and is heated and fused by the heater.

Next, the first joint 3 of the blood vessel connector 1 and the other end of the living blood vessel 10 are joined (anastomosis). In this case, as shown in FIG. 1, the other end of the living blood vessel 10 is inverted (expanded), the first joint 3 is brought into contact with the inverted portion 101, and the edge of the overlapped portion is formed. Then, a plurality of C-shaped clips 12 are attached to each of them, and each clip 12 is deformed to hold and fix the edge portion of the overlapped portion.

The method for fixing the first joint portion 3 and the living blood vessel 10 is not limited to the method using the clip 12 as described above, and for example, the everted portion of the living blood vessel 10 and the first joint portion 3 are fixed. Any method may be used, such as a method of bonding with a medical adhesive or a method of suturing.

According to the blood vessel connector 1 of the present invention as described above, since the artificial blood vessels having different lengths can be used by being bonded to their ends, particularly both ends, the graft length of the artificial blood vessel can be increased. It has the advantage of not choosing.

FIG. 4 is an enlarged vertical sectional view showing a second joint portion in the second embodiment of the blood vessel connector of the present invention.

In this embodiment, the second joint portion (cylindrical portion)
4 is provided with a fixing means 5 for fixing (or assisting the fixing) the connected artificial blood vessel 11, and other than that is the same as the first embodiment.

As shown in FIG. 4, the fixing means 5 is composed of a plurality of protrusions 51 protruding from the inner surface of the second joint portion 4. The tip of the protrusion 51 is sharp. When the artificial blood vessel 11 is bonded to the second bonding portion 4, each protrusion 51 has the artificial blood vessel 1
1 to fix the artificial blood vessel 11.

It is preferable that the projections 51 are formed so as to be dispersed substantially uniformly along the circumferential direction of the inner surface of the second joint portion 4.

The height S (length) of the protrusion 51 is not particularly limited, but when the thickness of the wall of the artificial blood vessel 11 to be connected is T, it is preferable that S <T, and 1 / 3T. ≤ S ≤
It is more preferably 2 / 3T.

It should be noted that the projection 51 has the second structure in the illustrated configuration.
Although it projects almost vertically from the inner surface of the joint part 4, it may project obliquely, for example, so that the tip of the protrusion 51 faces the main body part 2 side. This further enhances the effect of preventing the artificial blood vessel 11 from coming off.

Needless to say, the shape of the protrusion 51 is not limited to that shown in the figure. For example, the fixing means may be minute irregularities or grooves provided on the inner surface of the second joint portion 4.

By providing the fixing means as described above, the second joint portion 4 and the artificial blood vessel 11 are more firmly fixed and the artificial blood vessel 11 can be more effectively prevented from coming off.

The blood vessel connector of this embodiment may also be provided with the above-mentioned inner layer (fusion layer, adhesive layer) 41.

The blood vessel connector 1 of the present invention is not limited to the case of anastomosis (end-to-end anastomosis) between the first joint portion 3 and the end portion of the living blood vessel 10 as shown in FIG. 1 joint 3
It is also applicable when anastomosing (end-side anastomosis).

FIG. 5 shows an embodiment (third embodiment) of the blood vessel connector of the present invention used for such end-to-side anastomosis. Hereinafter, the embodiment shown in FIG. 5 will be described in detail.

The blood vessel connector 1 of this embodiment is used for obliquely joining the artificial blood vessel 11 to the side surface of the living blood vessel 10, and therefore the shape of the first joining portion (flange portion) 3 is changed. This is different from the first embodiment. The other configurations are the same as those in the first embodiment.

The first joint portion (flange portion) 3 has a taper shape such that the outer diameter thereof gradually increases toward the tip, but the taper angle θ changes along the circumferential direction of the flange portion. (See FIG. 5). That is, the taper angle θ is small in the first part 3a of the first joint part (flange part) 3, and the taper angle θ is small in the second part 3b opposite to the first part 3a with the tube axis interposed therebetween. large.

With this structure, the blood vessel connector 1 can be easily and surely joined to the side surface of the living blood vessel 10. Further, the value of θ and the rate of change of θ in the circumferential direction can take arbitrary values, whereby the blood vessel connector 1 that can be joined to the living blood vessel 10 at various angles can be designed. .

In the blood vessel connector 1 shown in FIG. 5, the living blood vessel 1
A part of the side surface of 0 is cut out to form an opening, and its edge is outwardly (expanded), and the first junction 3 is brought into contact with the everting portion 102, and the edge of the overlapping portion is removed. The clip 12 is used in the same manner as described above, or is fixed by another method.

Note that the blood vessel connector of this embodiment may also be provided with the fixing means represented by the small hole 31 and the protrusion 51 described above.

As described above, the blood vessel connector of the present invention is used for anastomosis (end-to-end anastomosis) between the end portion of the artificial blood vessel and the end portion of the living blood vessel, and also the end portion of the artificial blood vessel is attached to the side surface of the living blood vessel (end. It can also be used in the case of (side anastomosis), and has the advantage of not selecting an anastomosis technique.

Although the blood vessel connector of the present invention has been described with reference to the illustrated embodiments, the present invention is not limited to these, and the respective parts constituting the blood vessel connector exhibit similar functions. It can be replaced with one having any desired configuration.

[0072]

EXAMPLES Next, specific examples of the present invention will be described.

Example 1 A blood vessel connector having the structure shown in FIGS. 1 to 3 was produced.

In this blood vessel connector, a first joint portion (flange portion) and a second joint portion (cylindrical portion) are integrally formed at both ends of the main body. The specifications of this blood vessel connector are shown below.

Material: Three-layer laminate of inner layer made of polyester knitted tubular body / intermediate layer made of styrene elastomer and isoprene derivative / outer layer made of olefin elastomer Total length of vascular junction: 50 mm Outer diameter of main body: 8 mm Main body Inner diameter: 6 mm Tube wall thickness: 1 mm Maximum outer diameter of the first joint part: 12 mm Tapered angle of the first joint part: θ = 45 ° Small hole in the first joint part: 12 circular small holes of φ0.5 mm Outer diameter of the second joint part: 10 mm Inner diameter of the second joint part: 8 mm Inner layer of the second joint part: Olefin-based elastomer (melting point about 85 ° C) Inner layer thickness: 0.2 mm

On the other hand, the artificial blood vessel described in JP-A-7-142110 was prepared. The artificial blood vessel had an outer diameter of 8 mm and an inner diameter of 6 mm. This artificial blood vessel was cut into a length of 15 cm, one end of the artificial blood vessel was inserted into the second joint portion of the blood vessel connector, and heat of 100 ° C. was applied using a ring-shaped heater to heat-bond and fix the vessel.

Next, the end of the blood vessel (outer diameter: 6 mm) of the experimental animal is inverted, the second junction of the blood vessel connector is superposed on this outward deflection, and the edge is clipped as shown in FIG. They were fixed with 8 pieces and anastomosed.

Example 2 A blood vessel connector having the structure shown in FIGS. 1, 2 and 4 was produced.

In this blood vessel connector, a first joint portion (flange portion) and a second joint portion (cylindrical portion) are integrally formed at both ends of the main body. The specifications of this blood vessel connector are shown below.

Material: 3-layer laminate of inner layer made of polyester knit tubular body / intermediate layer made of styrene elastomer and isoprene derivative / outer layer made of olefin elastomer Total length of vascular joint: 50 mm Outer diameter of main body: 8 mm Main body Inner diameter: 6 mm Tube wall thickness: 1 mm Maximum outer diameter of the first joint part: 12 mm Tapered angle of the first joint part: θ = 45 ° Small hole in the first joint part: 12 circular small holes of φ0.5 mm Outer diameter of the second joint: 10 mm Inner diameter of the second joint: 8 mm Inner layer of the second joint: Silicone adhesive inner layer thickness: 0.2 mm Fixing means of the second joint: 0.5 mm in length Protrusion / 2 x 8
Individual

On the other hand, an artificial blood vessel similar to that of Example 1 was prepared, cut into a length of 15 cm, one end of which was inserted into the second joint of the blood vessel connector, and fixed by an adhesive and a fixing means.

Next, the end of the blood vessel (outer diameter: 6 mm) of the experimental animal is inverted, the second junction of the blood vessel connector is superposed on this inversion, and the edge is clipped as shown in FIG. They were fixed with 8 pieces and anastomosed.

Example 3 A blood vessel connector having the structure shown in FIG. 5 was produced.

In this blood vessel connector, the first joint portion (flange portion) and the second joint portion (cylindrical portion) are integrally formed at both ends of the main body. The specifications of this blood vessel connector are shown below.

Material: 3-layer laminate of inner layer made of polyester knitted tubular body / intermediate layer made of styrene elastomer and isoprene derivative / outer layer made of olefinic elastomer Total length of vascular joint: 45 mm Outer diameter of main body: 8 mm Inner diameter: 6 mm Tube wall thickness: 1 mm Maximum outer diameter of the first joint: 12 mm Taper angle of the first joint: θmin = 15 °, θmax
= 150 ° Small hole in the first joint: 12 circular small holes of φ 0.5 mm Outer diameter of the second joint: 10 mm Inner diameter of the second joint: 8 mm Inner layer of the second joint: Olefin-based elastomer (melting point (About 85 ℃)

An artificial blood vessel similar to that used in Example 1 was prepared, cut to a length of 15 cm, one end thereof was inserted into the second joint of the blood vessel connector, and heat of 100 ° C. was applied using a ring-shaped heater. It was heat-sealed and fixed.

Next, a part of the side surface of the blood vessel (outer diameter: 6 mm) of the experimental animal was incised, the edge of the opening was inverted, and the second junction of the blood vessel connector was attached to this inversion. They were overlapped and the edges were fixed with 12 clips shown in FIG. 1 and anastomosed. The vascular connector and artificial blood vessel were anastomosed to the blood vessel of the experimental animal at an angle of about 45 °.

[0088]

As described above, according to the present invention, it is possible to easily and surely join a living blood vessel and an artificial blood vessel. Particularly, since a flange portion is provided in advance,
There is no need to turn over at the time of joining, and an anastomosis operation with a living blood vessel is extremely easy.

Further, in joining with an artificial blood vessel, it can be surely fixed by a simple operation, and in particular, the second joining portion is expanded in diameter with respect to the main body portion, so that the inner diameter of the artificial blood vessel and the inner diameter of the main body portion are When the two are configured to be substantially equal to each other, it is possible to prevent turbulence in blood flow and extreme change in flow velocity, thereby ensuring a more ideal blood flow.

Further, by using the blood vessel connector of the present invention, it is possible to cope with the implantation length of any artificial blood vessel.

The vascular connector of the present invention is used for anastomosing the end portion of the artificial blood vessel and the end portion of the living blood vessel (end-to-end anastomosis), as well as anastomosing the end portion of the artificial blood vessel to the side surface of the living blood vessel (end-to-side anastomosis). It can be used for various types of anastomosis and can be used for various anastomosis procedures.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a blood vessel connector according to the present invention.

FIG. 2 is an enlarged vertical sectional view showing a first joint portion of the blood vessel connector of the present invention.

FIG. 3 is an enlarged vertical sectional view showing a second joint portion of the blood vessel connector according to the present invention.

FIG. 4 is an enlarged vertical sectional view showing a second joint portion in the second embodiment of the blood vessel connector of the present invention.

FIG. 5 is a perspective view showing a third embodiment of the blood vessel connector of the present invention.

[Explanation of symbols]

1 blood vessel connector 2 body 3 First joint (flange) 3a First part 3b Second part 31 small holes 4 Second joint (cylindrical part) 41 Inner layer 5 fixing means 51 protrusions 10 living blood vessels 101 Outer part 102 Outer part 11 artificial blood vessels 12 clips

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Claims (12)

[Claims] 1. A tubular body portion, a first joint portion provided on one end side of the body portion and joined to a living blood vessel, and a second joint portion provided on the other end side of the body portion and joined to an artificial blood vessel. A blood vessel connector having a joint portion, wherein the first joint portion is constituted by a flange portion projecting outward. 2. The blood vessel connector according to claim 1, wherein the flange portion has flexibility. 3. The blood vessel connector according to claim 1, wherein the flange portion is made of a porous material. 4. The blood vessel connector according to claim 1, wherein the flange portion has a tapered shape whose outer diameter changes along the tube axis direction. 5. The blood vessel connector according to claim 4, wherein the taper angle of the flange portion changes along the circumferential direction. 6. The blood vessel connector according to claim 1, wherein the flange portion is formed with a small hole penetrating the flange portion. 7. The second joint portion is expanded in diameter with respect to the main body portion, and an artificial blood vessel is inserted into the inner cavity to connect.
7. The blood vessel connector according to any one of items 1 to 6. 8. The blood vessel connector according to claim 7, wherein an inner diameter of the artificial blood vessel and an inner diameter of the main body portion are substantially equal to each other when the artificial blood vessel is joined to the second joint portion. 9. The blood vessel connector according to claim 1, wherein at least an inner surface of the second joint portion is made of a material capable of being fused with an artificial blood vessel. 10. The blood vessel connector according to claim 1, further comprising an adhesive layer on an inner surface of the second joint portion. 11. The blood vessel connector according to claim 1, wherein the second joint portion has fixing means for fixing or assisting the connected artificial blood vessel. 12. The blood vessel connector according to claim 11, wherein the fixing means is a plurality of protrusions that engage with the artificial blood vessel.