JPH10295698A - Fixing apparatus for cut part of blood vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To trim a cut part of a blood vessel so as to have a circular section and a certain thickness. SOLUTION: A fixing apparatus 1 is equipped at its body 3 with a rubber sack 2 which is expanded and contracted by feeding the air and exhausting and can be inserted to the inside from the end of a blood vessel (a) at the time of being contracted and an air passage leading from the inside the sack 2 to the outside, and is further furnished with an air supply part 4 to feed and exhaust air to/from the rubber sack 2 through the air passage and an outer cylinder 5 to be fitted on the blood vessel (a). A bonding agent for reinforcement is injected into the wall of the blood vessel (a) in its cut part, and the sack 2 is inserted into the blood vessel (a) as positioned corresponding to the outer cylinder (a) fitted on the cut part of the blood vessel (a), and the air supply part 4 is actuated so as to feed the air into the sack 2 for its inflation, and the cut part is fixed in the area to the outer cylinder 5. When the bonding agent has solidified, an artificial blood vessel is sewn fast to the cut part so that the coupling is accomplished. Because the cut part is fixed between the sack 2 and outer cylinder 5, the cut part is trimmed so as to have a circular section and a certain thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an operation for cutting a part of a blood vessel to remove an aneurysm and suturing both ends of an artificial blood vessel to both cut portions of the blood vessel, for example, before the suturing. After inserting the injection needle from the cut surface into the thickness of the blood vessel wall and injecting a medical adhesive for reinforcement into the vascular tissue near the cut end, until the adhesive solidifies, the blood vessel cutting section The present invention relates to a fixation device for a blood vessel cutting section for fixing a blood vessel wall of a predetermined cross-sectional shape which does not hinder the flow of blood, for example, a circular cross section, and the thickness of the blood vessel wall of the cut section does not vary.

[0002]

2. Description of the Related Art Conventionally, there is no such a fixator, and in the above-mentioned operation, after inserting an injection needle from a cut surface of a blood vessel and injecting an adhesive, the cut portion of the blood vessel is sandwiched by a plurality of clips. Therefore, the blood vessel wall was fixed so as to have a regular circular cross section and a constant thickness of the blood vessel wall. Then, when the adhesive was solidified in about 5 minutes to shape and strengthen the cut portion of the blood vessel, the end of the artificial blood vessel was sutured.

[0003]

In the above-mentioned conventional fixing method using a clip, the cut portion of the blood vessel undulates or the thickness of the blood vessel wall tends to vary, which hinders the subsequent suturing of the artificial blood vessel. There was a problem that it could come.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides a fixation device for a blood vessel cutting portion which has a predetermined cross-sectional shape and a uniform thickness of a blood vessel wall. The purpose is to do.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided an expanding / contracting body which can be expanded and contracted as required and which can be inserted inward from a cut end of a blood vessel when contracted. A fixing device main body, an expansion / contraction drive unit for expanding / contracting the expansion / contraction body, and an outer cylinder fitted to the outer periphery of the blood vessel.

The present invention according to a second aspect of the present invention has a rubber sack which can be expanded and contracted by feeding and discharging air, and which can be inserted inside from a cut end of a blood vessel when the air is reduced, and which connects the inside and the outside of the rubber sack. A fixing device main body having an air flow passage communicating therewith; an air supply unit for feeding and discharging air into and from the rubber sack via the air flow passage; and an outer cylinder fitted to the outer periphery of the blood vessel. Things.

According to a third aspect of the present invention, an outer diameter of the fixing device main body according to the second aspect is increased from a distal end side to a base end side so that a rubber sack open end can be fitted from a distal end thereof. Forming an inclined outer peripheral surface that gradually increases, an inner having an air flow passage penetrating between the distal end and the proximal end, and an inclined inner peripheral surface formed to be in close contact with the inclined outer peripheral surface. It comprises a tubular outer and a fixing member for fixing the outer and the inner.

According to a fourth aspect of the present invention, there is provided an air supply unit according to the second or third aspect, comprising a syringe comprising a syringe and a piston, and a cock for switching air passage and cutoff. And a flexible pipe for connecting the syringe and the air flow passage of the fixing device body.

[0009]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Here, FIG. 1 of the accompanying drawings is a front view of a state where each part is disassembled, FIG. 2 is a longitudinal sectional view of a fixing device main body, FIG. 3 is a longitudinal sectional view of an inner, FIG. 4 is a longitudinal sectional view of an outer, FIG. It is a longitudinal section of a cap nut.

As shown in FIG. 1 and FIG.
Is composed of a thin rubber that expands by being supplied with air and contracts by being evacuated, and has a rubber sack 2 having an open end and a rubber sack 2 having one end opened.
A main body 3 for detachably supporting the blood vessel a, an air supply section 4 as an expansion / contraction body driving section for feeding and discharging air into and from the rubber sack 2, and a cross section having an inner diameter that fits on the outer periphery of the blood vessel a. The outer cylinder 5 has a regular circular shape. This outer cylinder 5
To be able to select according to the thickness of the blood vessel to be operated,
Prepare a plurality of different inner diameters.

As shown in FIGS. 2 to 5, the outer diameter of the fixing device main body 3 gradually increases from the distal end to the proximal end so that the open end of the rubber sack 2 can be covered from the distal end. The inclined outer peripheral surface 6 is formed substantially at the center, an inner 8 provided with an air flow passage 7 penetrating between the front end and the base end on the center line, and the inclined inner peripheral surface 9 closely contacting the inclined outer peripheral surface 6 are formed. A substantially cylindrical outer 11 provided with a male spiral 10 at the outer peripheral end, and a large-diameter hole and a small-diameter hole provided with a female spiral 12 screwed to the male spiral 10 are communicated inward. And a cap nut 13 which is a fixing member provided. The inner diameter of the small-diameter hole corresponds to the outer diameter of the proximal end of the inner 8, and the inner diameter of the large-diameter hole corresponds to the outer diameter of the outer 11. Further, a step 14 is formed at the end of the inclined outer peripheral surface 6 of the inner 8, while a step 15 which can abut the step 14 is provided between the large diameter hole and the small diameter hole of the cap nut 13. Is formed.

The fixing device body 3 covers the inclined outer peripheral surface 6 of the inner 8 with the open end of the rubber sack 2, fits the outer 11 from above, and fits the cap nut 13 from the base end of the inner 8. Then, the female spiral 12 is screwed into the male spiral 10 of the outer 11 until the steps 14, 15 abut. When the inner 8 and the outer 11 are fixed by the cap nut 11 serving as a fixing member in this manner, the vicinity of the open end of the rubber sack 2 is firmly supported by being sandwiched between the inclined outer peripheral surface 6 and the inclined inner peripheral surface 9 in a close contact state. There is no danger of air leakage or sudden dropping.

As shown in FIG. 1, the air supply unit 4
Is a syringe 16 which is an air delivery member composed of a syringe barrel and a piston, and a connecting portion which can be detachably connected to the spout 16a of the syringe 16 and the outer end of the air flow passage 7 of the inner 8 of the fixing device body 3. 17a and 17b are provided at both ends and a cock 1 for passing and blocking air.
8 is provided with a flexible pipe 19. The cock 18 is rotatably mounted on the connecting portion 17a, and allows air to pass when the connecting portion 17a is extended in the axial direction (the state shown in FIG. 1) and shuts off air when the connecting portion 17a is rotated by 90 degrees. Is what you do. Then, connecting portions 17a and 17b of a flexible pipe 19 are connected to the outlet 16a and the outer end of the air flow passage 7, and the cock 18 is brought into the state shown in FIG. Numeral 2 indicates that air is sent in and expands (see a two-dot chain line in FIG. 1).

Next, an operation using the fixing device 1 of the above embodiment will be described. First, a part of the arterial blood vessel a is excised to remove the aneurysm, a syringe needle is inserted into the thickness of the blood vessel a wall from the cut surface of the blood vessel a, and a medical adhesive is injected into the blood vessel tissue. Subsequently, the outer cylinder 5 is fitted to the outer periphery of the cut portion of the blood vessel a, and the rubber sack 2 is reduced to the inside of the cut portion.
Is inserted into the rubber sack 2 from the syringe 16 via the flexible pipe 19 and the air flow passage 7,
The wall of the blood vessel a is pressed against the inner surface of the outer cylinder 5 by the expansion of the rubber sack 2 and has a circular cross section and is maintained at a constant thickness. The adhesive injected in this way hardens in about 5 minutes, and the cut section of the blood vessel a is shaped into a circular cross section and has a constant thickness, and is reinforced. Here, the ends of the artificial blood vessel are sutured, and the blood vessel a portion cut as described above is connected by an artificial blood vessel (not shown).

The present invention is not limited to the above-described embodiment. For example, the expanding / contracting body may be one which expands / contracts mechanically instead of the rubber sack 2. in this case,
The enlargement / reduction drive unit is changed to one different from the air supply unit. Further, the fixing device main body 3 does not have to be assembled and configured as in the above embodiment. Further, the air supply unit may have a different mechanism from that using the syringe 16. Still further, the outer cylinder 5 may have a structure whose inner diameter can be changed according to the thickness of the blood vessel to be operated, and the outer cylinder 5 has an elliptical cross section instead of a perfect circle. May be changed to another shape.

[0016]

As described above, according to the first aspect of the present invention, it is easy and reliable to shape the cut section of the blood vessel into a predetermined thickness with a predetermined cross-sectional shape. This has the effect of not interfering with the suturing operation.

According to the second aspect of the present invention, it is easy and reliable to shape the cut section of the blood vessel to have a predetermined cross-sectional shape and a predetermined thickness, which hinders the subsequent suturing operation of the artificial blood vessel. In addition, since the blood vessel cut section is fixed by feeding and discharging air into and from the rubber sack, the operation is easy and there is no risk of damaging the blood vessel.

Further, the present invention described in claim 3 provides:
In addition to the effects of the invention described in claim 2,
Since the main body of the fixing device can be disassembled, the rubber sack can be exchanged and it is economical, and the rubber sack has its open end near the inner inclined outer peripheral surface and the outer inclined inner peripheral surface in close contact with it. It is firmly supported and has an effect that there is no risk of air leakage or unexpected dropout.

Further, according to the present invention as set forth in claim 4, in addition to the effects of the invention as set forth in claim 2 or 3, the air supply unit is provided with a syringe, and the passage and cutoff of air. The flexible pipe provided with a cock for switching the air supply makes it easy to supply the air to the rubber sack, stop after the supply, and discharge the air.

[Brief description of the drawings]

FIG. 1 is a front view of a state where each part is disassembled.

FIG. 2 is a longitudinal sectional view of a fixing device main body.

FIG. 3 is a longitudinal sectional view of a fixed inner.

FIG. 4 is a longitudinal sectional view of a fixed outer.

FIG. 5 is a longitudinal sectional view of a cap nut.

[Explanation of symbols]

 a blood vessel 1 fixator 2 rubber sack 3 fixator body 4 air supply unit 5 outer cylinder 6 inclined outer peripheral surface 7 air flow passage 8 inner 9 inclined inner peripheral surface 11 outer 13 bag nut 16 syringe 18 cock 19 flexible pipe

Claims (4)

[Claims] 1. A fixing device body having an expandable / contractible body which can be expanded / reduced as required and inserted inside from a cut end of a blood vessel at the time of reduction, an expansion / contraction drive unit for expanding / contracting the expandable / contractible body, and fitted on the outer periphery of the blood vessel. A fixation device for a blood vessel cutting section having a matching outer cylinder. 2. A fixing device main body having a rubber sack which can be expanded and contracted by air supply and discharge and which can be inserted into the blood vessel from the cut end when the air is reduced, and which has an air flow passage communicating the inside and the outside of the rubber sack. A blood vessel cutting part fixing device, comprising: an air supply part for feeding and discharging air into and from the rubber sack through the air flow passage; and an outer cylinder fitted to the outer periphery of the blood vessel. 3. An inclined outer peripheral surface having an outer diameter gradually increasing from a distal end to a proximal end so as to cover the open end of the rubber sack from the distal end of the fixer main body. An inner having an air flow passage extending therethrough, an approximately cylindrical outer having an inclined inner peripheral surface formed so as to be in close contact with the inclined outer peripheral surface, and a fixing member for fixing the outer and the inner 3. The fixation device for a blood vessel cutting section according to claim 2, comprising: 4. An air supply unit comprising: a syringe comprising a syringe barrel and a piston; and a cock provided with a cock for switching between passage and cutoff of air, and a flexible pipe for communicating between the syringe and an air flow passage of the body of the fixed body. The fixation device for a blood vessel cutting section according to claim 2 or 3, which is configured.