JPH1033681A - Balloon catheter in aorta - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of slackening of a balloon at the time of insertion so as to facilitate insertion. SOLUTION: A balloon catheter 10, which is inserted in an aorta and conducts assisting action on the heart function by expanding a balloon 2 disposed in the tip of a catheter 1, is provided with an intermediate member 4 which is interposed in a joint part 11 for joining a balloon film 20 and the catheter 1, connects the catheter 1 to the central tube 3, and has a gas connection hole 44 enabling the supply of gas into the balloon 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intra-aortic balloon catheter which is inserted into an aorta and inflates the balloon to perform a function of assisting the heart function. The present invention relates to an intra-aortic balloon catheter that is connected near a joint to be joined to the catheter to prevent the balloon from sagging during insertion.

[0002]

2. Description of the Related Art A conventional intra-aortic balloon catheter is
Since the catheter K and the central tube C are connected at the rear end R, when the balloon catheter is inserted into the human body H as shown in FIG.
In some cases, sagging occurred in the film part of the film, making insertion difficult.

Therefore, a conventional intra-aortic balloon catheter has a structure in which the inner wall of the catheter K and the outer wall of the central tube C are connected at a plurality of points P as shown in FIG.

[0004]

In the above-mentioned conventional intra-aortic balloon catheter, the inner wall of the catheter and the outer wall of the central tube are connected at a plurality of locations.
Compared to the conventional intra-aortic balloon catheter that connects only the rear end of the catheter and the central tube, when inserting the balloon catheter into the body, the occurrence of sagging in the balloon membrane is suppressed to some extent, but not always sufficient. There was a problem that insertion might be difficult.

Accordingly, the present inventor has proposed an intra-aortic balloon catheter which is inserted into the aorta and inflates the balloon to assist the heart function. The catheter and the central tube are connected to the balloon membrane constituting the balloon. Focusing on the technical idea of the present invention that the connection is made in the vicinity of the joint to be joined to the joint, further research and development are performed to prevent the occurrence of sagging of the balloon at the time of insertion, and achieve the object of facilitating insertion The present invention has been reached.

[0006]

The intra-aortic balloon catheter of the present invention (the first invention according to claim 1) is an intra-aortic balloon catheter which is inserted into the aorta and inflates the balloon to perform a function of assisting cardiac function. In the catheter, the catheter and a support member that supports a balloon membrane that constitutes the balloon are connected near a joint that joins the balloon membrane to the catheter.

[0007] The intra-aortic balloon catheter according to the present invention (the second invention according to the second invention) is characterized in that in the first invention,
The support member is a central tube.

[0008] The intra-aortic balloon catheter according to the present invention (third invention according to claim 3) is characterized in that in the second invention,
An intermediate member that is inserted into a joint that joins the balloon membrane and the catheter, connects the catheter and the central tube, and has a gas communication hole that enables gas to be supplied into the balloon. Is what it is.

[0009] The intra-aortic balloon catheter according to the present invention (fourth invention according to claim 4) is characterized in that in the third invention,
The intermediate member comprises a small-diameter portion fixed to the outer peripheral wall of the central tube, a large-diameter portion fixed to the inner peripheral wall of the catheter, and a conical portion connecting between the small-diameter portion and the large-diameter portion. And a through hole as a gas communication hole penetrating the outer peripheral wall of the conical portion and the large diameter portion.

[0010] The intra-aortic balloon catheter according to the present invention (fifth invention according to claim 5) is characterized in that in the third invention,
The intermediate member connects the small-diameter coil section fixed to the outer peripheral wall of the central tube, the large-diameter coil section fixed to the inner peripheral wall of the catheter, and the small-diameter coil section and the large-diameter coil section. And a taper coil portion in which the diameter of the coil increases.

[0011] The intra-aortic balloon catheter according to the present invention (the sixth invention according to claim 6) is characterized in that in the third invention,
The intermediate member is constituted by a plurality of pipes radially disposed in an annular gap between the central tube and the catheter by being adhered to an outer peripheral wall and an inner peripheral wall thereof.

[0012] The intra-aortic balloon catheter of the present invention (the seventh invention of the seventh invention) is characterized in that in the second invention,
The intermediate member connects the small-diameter coil section fixed to the outer peripheral wall of the central tube, the large-diameter coil section fixed to the inner peripheral wall of the catheter, and the small-diameter coil section and the large-diameter coil section. It is constituted by a coil member composed of a plurality of inclined legs.

[0013]

The intra-aortic balloon catheter according to the first aspect of the present invention having the above-mentioned structure is an intra-aortic balloon catheter which is inserted into the aorta and inflates the balloon to assist the heart function. Since the catheter and the support member are connected in the vicinity of the joint to be joined to the catheter, the relative movement between the catheter and the support member during insertion is prevented, and the occurrence of sagging of the folded balloon membrane is prevented. This has the effect of preventing insertion and facilitating insertion.

The intra-aortic balloon catheter according to the second aspect of the present invention, having the above-mentioned structure, is characterized in that, in the first aspect, the catheter and the central tube constituting the supporting member are provided in the vicinity of the joint for joining the balloon membrane to the catheter. Since connected, the relative movement of the catheter and the central tube during insertion is prevented,
This has the effect of preventing the folded balloon membrane from sagging and facilitating insertion.

The intra-aortic balloon catheter according to a third aspect of the present invention having the above-mentioned structure is characterized in that, in the second aspect, the intermediate member inserted into the joint for joining the balloon membrane and the catheter comprises the catheter and the central tube. And connecting the catheter and the central tube at the time of insertion to prevent relative movement between them, preventing the occurrence of sagging of the folded balloon membrane, and having the effect of facilitating insertion. The gas communication hole has an effect that the gas can be supplied into the balloon.

The intra-aortic balloon catheter according to the fourth aspect of the present invention having the above-mentioned structure is a small-diameter portion fixed to the outer peripheral wall of the central tube constituting the intermediate member in the third aspect, and fixed to the inner peripheral wall of the catheter. The large-diameter portion, the hollow cylindrical body comprising a conical portion connecting between the small-diameter portion and the large-diameter portion, connecting the catheter and the central tube, the catheter and the catheter at the time of insertion The effect of preventing relative movement with the central tube, preventing the occurrence of sagging of the folded balloon membrane and facilitating insertion is achieved, and the conical portion is removed from the space inside the hollow cylindrical body. In addition, the gas communication hole penetrating the outer peripheral wall of the large diameter portion has an effect that the gas can be supplied into the balloon.

The intra-aortic balloon catheter according to a fifth aspect of the present invention having the above-mentioned structure, according to the third aspect, includes a small-diameter coil portion fixed to an outer peripheral wall of the central tube constituting the intermediate member, and an inner peripheral wall of the catheter. The coil member comprising a large-diameter coil portion to be fixed, and a taper coil portion in which the diameter of a coil connecting the small-diameter coil portion and the large-diameter coil portion increases, connecting the catheter and the central tube. The effect that the relative movement between the catheter and the central tube at the time of insertion is elastically blocked to prevent the folded balloon membrane from sagging, thereby facilitating insertion, and that the coil There is an effect that the gas can be supplied into the balloon from the gap between the coils of the member.

The intra-aortic balloon catheter according to a sixth aspect of the present invention having the above-mentioned structure, according to the third aspect of the present invention, has an outer peripheral wall and an inner peripheral wall in an annular gap between the central tube constituting the intermediate member and the catheter. The plurality of bonded and radially arranged pipes connect the catheter and the central tube to prevent relative movement between the catheter and the central tube at the time of insertion, thereby forming a folded balloon membrane. This has the effect of preventing the occurrence of slack and facilitating insertion, and the effect of enabling the supply of gas into the balloon through the internal passages of the plurality of pipes.

The intra-aortic balloon catheter according to the seventh aspect of the present invention, having the above-mentioned structure, is characterized in that, in the third aspect, a small-diameter coil portion fixed to an outer peripheral wall of the central tube constituting the intermediate member and an inner peripheral wall of the catheter. The four inclined legs of the coil member connecting between the large diameter coil portion to be connected connect the catheter and the central tube, and the relative movement between the catheter and the central tube at the time of insertion. Elastically prevents the folded balloon membrane from sagging, thereby facilitating insertion, and allows gas to flow into the balloon from the gap between the four inclined legs. This has the effect of enabling supply.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention are described below.
This will be described with reference to the drawings.

(First Embodiment) The intra-aortic balloon catheter of the first embodiment is constructed by inflating a balloon 2 inserted into the aorta and disposed at the distal end of the catheter 1 as shown in FIGS. In the intra-aortic balloon catheter 10 that performs a function assisting function, the catheter 1 is inserted into the joint portion 11 that joins the balloon membrane 20 and the catheter 1, and connects the catheter 1 and the central tube 3 as a support member. The balloon 2
It is provided with an intermediate member 4 having a gas communication hole 44 that enables the supply of gas into the inside.

The intra-aortic balloon catheter 10 comprises:
As shown in FIG. 2, the balloon 2 provided at one end of the catheter 1, the small-diameter central tube 3 provided coaxially within the catheter 1, and the other end of the catheter 1 are provided. The branch unit 5 includes a pump device 6 that communicates with a pressure fluid inlet 51 of the branch unit 5 to supply or discharge gas.

The catheter 1 is made of polyurethane,
Inner diameter of polyvinyl chloride, polyethylene, nylon, etc.
5 to 4.0 mm and wall thickness 0.05 to 0.4 m
m.

The central tube 3 is made of a material such as polyurethane, polyvinyl chloride, polyethylene, nylon, stainless steel, or other metal having an inner diameter of 0.5 to 1.5 mm.
And a cap portion 31 formed of a tube extruded so as to have a wall thickness of 0.05 to 0.4 mm and having a blood inlet 311 formed at the end thereof is hermetically disposed by heat fusion or adhesion. , An opening 32 formed with a blood pressure measurement opening 321 for measuring blood pressure at the rear end
Are hermetically arranged by heat sealing or bonding.

The pump device 6 is provided with an intra-aortic balloon pumping method.
As shown in FIG. 3, a balloon is inserted into the aorta for treatment during cardiac function deterioration such as heart failure, and helium gas as a pressure fluid is introduced into the balloon 2 from the catheter 1 in synchronization with the heart beat. The balloon 2 is introduced or taken out and inflated and deflated as shown in FIG. 6 and FIG.

The balloon membrane 20 constituting the balloon 2
Is made of, for example, a polyurethane or other thin film having a thickness of about 0.1 mm, and has a tip portion provided with a blood inlet provided at the tip of the central tube 3 and having a cap portion 3 formed therein.
1 is hermetically attached to the outer peripheral wall of the catheter 1 by heat fusion or adhesion, and the rear end is hermetically attached to the outer peripheral wall of the catheter 1 by heat fusion or adhesion, and is wound around the central tube 3 at the time of insertion. Have been.

The intermediate member 4 is shown in FIGS.
As shown in FIG. 3, a small diameter portion 41 joined and fixed to the outer peripheral wall of the central tube 3, a large diameter portion 42 joined and fixed to the inner peripheral wall of the catheter, and a connection between the small diameter portion and the large diameter portion. An oval through-hole 44 is formed as a gas communication hole which is formed by a stainless steel hollow cylindrical body 40 having a conical portion 43 and a gas communication hole penetrating the outer peripheral wall of the conical portion 43 and the large-diameter portion 42. I have.

In the intra-aortic balloon catheter of the first embodiment having the above structure, the catheter 1 and the central tube 3 are connected in the vicinity of the junction where the balloon membrane 20 is joined to the catheter 1.
As shown in FIG. 3, the wrapped balloon shown in FIG. 6 inserted into the aorta is expanded as shown in FIG. The relative movement between the catheter 1 and the central tube 3 is prevented.

The intra-aortic balloon catheter according to the first embodiment, which has the above-described operation, prevents the relative movement between the catheter 1 and the central tube 3 when the catheter is inserted.
This has the effect of preventing the occurrence of slack and facilitating insertion.

Further, the intra-aortic balloon catheter of the first embodiment is configured by the intermediate member 4 inserted in the joint for joining the balloon membrane 20 and the Zx-tel 1.
Since the catheter 1 and the central tube 3 are connected to each other, the relative movement between the catheter 1 and the central tube 3 at the time of insertion is prevented, and the slack of the wound balloon membrane 20 is prevented. This has the effect of facilitating insertion.

Further, the intra-aortic balloon catheter of the first embodiment has an effect that the gas communication hole 44 enables supply and discharge of gas into the balloon 2.

The intra-aortic balloon catheter of the first embodiment has the small-diameter portion 41 fixed to the outer peripheral wall of the central tube 3 constituting the intermediate member 4 and the small-diameter portion 41 fixed to the inner peripheral wall of the catheter 1. A large diameter portion 42,
The catheter 1 and the central tube 3 are connected by the hollow cylindrical body 40 including the conical portion 43 connecting between the small diameter portion 41 and the large diameter portion 42.
The catheter 1 and the central tube 3 at the time of insertion
Relative movement is prevented.

Therefore, the intra-aortic balloon catheter of the first embodiment has the effect of preventing the wound balloon membrane 20 from becoming slack and facilitating the insertion, and the inside of the hollow cylindrical body 40. The gas communication hole 44 penetrating the outer peripheral wall of the conical portion 43 and the large diameter portion 42 from the space described above has an effect that the gas can be supplied into the balloon 2.

The intra-aortic balloon catheter according to the first embodiment further comprises a hollow cylindrical member 40 having a simple configuration including the small diameter portion 41, the large diameter portion 42, and the conical portion 43.
As a result, the catheter 1 and the central tube 3 are securely connected to each other.
This has the effect of reliably preventing slack from occurring and facilitating insertion.

(Second Embodiment) An intra-aortic balloon catheter according to a second embodiment is different from the first embodiment in that the hollow member 40 is replaced with the intermediate member 4 as shown in FIG.
Is constituted by the coil member 7 from the first embodiment, and only the differences will be described below.

The coil member 7 has a small-diameter coil portion 71 fixed to the outer peripheral wall of the central tube 3 and a large-diameter coil portion 72 fixed to the inner peripheral wall of the catheter 1.
And a taper coil portion 73 in which the diameter of the coil connecting the small-diameter coil portion 71 and the large-diameter coil portion 72 is increased. Constant coil member 7
Composed of

The intra-aortic balloon catheter according to the second embodiment having the above-described configuration is characterized in that the coil comprising the tapered coil portion 73 in which the diameter of the coil connecting between the small-diameter coil portion 71 and the large-diameter coil portion 72 increases. The member 7 connects the catheter 1 to which the large-diameter coil portion 72 is fixed and the central tube 3 to which the small-diameter coil portion 71 is fixed by the taper coil portion 73, and inserts the catheter and the central tube at the time of insertion. It elastically blocks relative movement with the tube.

In the intra-aortic balloon catheter according to the second embodiment having the above-described operation, the coil member 7 elastically prevents the relative movement between the catheter 1 and the central tube 3 during insertion (almost no deformation). Therefore, it is possible to prevent the folded balloon membrane 20 from being sagged by a simple configuration, thereby facilitating the insertion, and to provide the gas into the balloon 2 from the gap between the coils of the coil member 7. This has the effect of enabling supply and discharge of water.

(Third Embodiment) The intra-aortic balloon catheter of the third embodiment has a plurality of intermediate members as shown in FIGS. 9 and 10, instead of the hollow cylindrical body 40 of the first embodiment. This embodiment is different from the first embodiment in that the second embodiment is constituted by the pipe 8 described above.

The intermediate member is constituted by a plurality of pipes 8 radially arranged in an annular gap between the central tube 3 and the catheter 1 by being adhered to the outer and inner peripheral walls thereof.

The intra-aortic balloon catheter according to the third embodiment having the above-described configuration has an outer peripheral wall of the central tube 3 formed by a plurality of pipes 8 disposed in an annular gap between the central tube 3 and the catheter 1. And the inner peripheral wall of the catheter 1 are bonded and connected to the outer peripheral walls of the plurality of pipes 8 to prevent relative movement between the catheter 1 and the central tube 3 during insertion.

In the third embodiment of the intra-aortic balloon catheter having the above operation, the plurality of pipes 8 connect the catheter 1 and the central tube 3 to each other.
The catheter 1 and the central tube 3 at the time of insertion
Since the relative movement of the balloon membrane 20 is prevented, it is possible to prevent the balloon membrane 20 that has been entangled from becoming slack, thereby facilitating insertion.

Further, the intra-aortic balloon catheter of the third embodiment has an effect of enabling supply and discharge of gas into and from the balloon 2 through the internal passages of the plurality of pipes 8.

(Fourth Embodiment) The intra-aortic balloon catheter according to the second embodiment is different from the first embodiment in that the hollow member 40 is replaced with a coil member 9 as shown in FIG. This is a difference from the first embodiment, and only the differences will be described below.

The coil member 9 is fixed to the outer peripheral wall of the central tube 3 and is wound around the small-diameter coil portion 91 and the catheter 1 is fixed to the inner peripheral wall of the catheter 1 and wound around a large-diameter coil portion. 92, and four inclined legs 93 connecting between the small-diameter coil portion 91 and the large-diameter coil portion 92.

The intra-aortic balloon catheter according to the fourth embodiment having the above-described configuration includes the small-diameter coil portion 91 fixed to the outer peripheral wall of the central tube 3 and the large-diameter coil portion fixed to the inner peripheral wall of the catheter 1. 92 and the four inclined legs 93 of the coil member 9 connecting between
However, the catheter 1 and the central tube 3 are connected to prevent the relative movement between the catheter 1 and the central tube 3 during insertion.

In the intra-aortic balloon catheter according to the fourth embodiment having the above-described operation, the four inclined legs 93 connect the catheter 1 and the central tube 3 to each other.
The catheter 1 and the central tube 3 at the time of insertion
Since the relative movement of the balloon membrane 20 is reliably prevented, the occurrence of slack of the entangled balloon membrane 20 is effectively prevented, and the effect that the insertion is further facilitated is achieved.

Further, the intra-aortic balloon catheter according to the fourth embodiment has an effect that the gas can be supplied and discharged into the balloon 2 from the four triangular gaps of the four inclined legs 93. .

The above-described embodiments have been described by way of example only, and the present invention is not limited to these embodiments. Those skilled in the art will recognize from the claims, the detailed description of the invention, and the drawings. Modifications and additions are possible without departing from the technical idea of the present invention.

In the above-described first embodiment, an example in which the support member is constituted by the central tube has been described as an example. However, the present invention is not limited to this. For example, the support member may be coaxial with the catheter or provided inside the catheter. It is also possible to use a solid thin rod-shaped member provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of an intra-aortic balloon catheter according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional whole sectional view showing the whole intra-aortic balloon catheter of the first embodiment.

FIG. 3 is an explanatory diagram illustrating a state in which the intra-aortic balloon catheter according to the first embodiment is inserted into a human body.

FIG. 4 is an enlarged side view showing an intermediate member according to the first embodiment.

FIG. 5 is an enlarged sectional view showing an intermediate member according to the first embodiment.

FIG. 6 is a side view showing a state in which the balloon is wound in the first embodiment.

FIG. 7 is a side view showing an inflated state of the balloon according to the first embodiment.

FIG. 8 is a sectional view showing a main part of an intra-aortic balloon catheter according to a second embodiment of the present invention.

FIG. 9 is a sectional view showing a main part of an intra-aortic balloon catheter according to a third embodiment of the present invention.

FIG. 10 is an enlarged sectional view showing a pipe member according to the third embodiment.

FIG. 11 is a sectional view showing a main part of an intra-aortic balloon catheter according to a fourth embodiment of the present invention.

FIG. 12 is an explanatory view showing a state in which the membrane of the balloon of the conventional intra-aortic balloon catheter is sagged.

FIG. 13 is an explanatory view showing a state in which a catheter and a central tube in a conventional intra-aortic balloon catheter are joined at a plurality of locations.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Catheter 2 Balloon 3 Central tube 4 Intermediate member 10 Intra-aortic balloon catheter 20 Balloon membrane 44 Gas communication hole

Claims (7)

[Claims] 1. An intra-aortic balloon catheter which is inserted into an aorta and assists in cardiac function by inflating a balloon, wherein the catheter and a support member for supporting a balloon membrane constituting the balloon are connected to the balloon membrane. Is connected in the vicinity of the joint for joining the catheter to the catheter. 2. The intra-aortic balloon catheter according to claim 1, wherein the support member is a central tube. 3. The balloon according to claim 2, wherein the catheter is inserted into a joint portion that joins the balloon membrane and the catheter to connect the catheter to a central tube and to supply gas into the balloon. An intra-aortic balloon catheter comprising an intermediate member having a gas communication hole. 4. The intermediate member according to claim 3, wherein the intermediate member has a small-diameter portion fixed to an outer peripheral wall of the central tube, a large-diameter portion fixed to an inner peripheral wall of the catheter, and the small-diameter portion and the large-diameter portion. And a conical portion connecting between the conical portion and a large diameter portion, and a through hole as a gas communication hole penetrating the outer peripheral wall of the conical portion and the large diameter portion is provided. Intra-aortic balloon catheter. 5. The small-diameter coil portion according to claim 3, wherein the intermediate member is fixed to an outer peripheral wall of the central tube, a large-diameter coil portion fixed to an inner peripheral wall of the catheter, and the small-diameter coil portion. An intra-aortic balloon catheter, comprising: a coil member including a tapered coil portion in which a diameter of a coil connected to a large-diameter coil portion increases. 6. The intermediate member according to claim 3, wherein the intermediate member is constituted by a plurality of pipes radially arranged in an annular gap between the central tube and the catheter by being adhered to an outer peripheral wall and an inner peripheral wall thereof. An intra-aortic balloon catheter, characterized in that: 7. The small-diameter coil according to claim 2, wherein the intermediate member has a small-diameter coil fixed to an outer peripheral wall of the central tube, a large-diameter coil fixed to an inner peripheral wall of the catheter, and the small-diameter coil. An intra-aortic balloon catheter, comprising: a coil member comprising a plurality of inclined legs connecting between a large-diameter coil portion.