CN117065185A

CN117065185A - detachable balloon catheter

Info

Publication number: CN117065185A
Application number: CN202210495886.6A
Authority: CN
Inventors: 毛杰; 车绪新; 王�锋
Original assignee: Shenzhen Meimeimeichuangyi Medical Technology Co ltd
Current assignee: Shenzhen Meimeimeichuangyi Medical Technology Co ltd
Priority date: 2022-05-08
Filing date: 2022-05-08
Publication date: 2023-11-17

Abstract

The invention provides a detachable balloon catheter, which includes a push tube and at least one expansion component. The push tube has an elongated tubular structure; the expansion component includes a support tube, a balloon and a balloon inflation tube. The push tube is connected with each expansion tube. The support tubes of the assembly are detachably connected in sequence along the axial direction; the balloon is wound on the outer wall of the support tube; the distal end of the balloon inflation tube is fixedly connected to the support tube and communicates with the inner cavity of the balloon , the balloon inflation tube of each expansion component can extend axially along the outer wall of the push tube to the proximal end of the balloon catheter; after tightening each balloon inflation tube axially and making it fixedly connected to the push tube, the push tube can be It forms a fixed overall structure with each expansion component. After the fixed connection between the balloon inflation tube and the push tube is released, each expansion component can be released in sequence. The detachable balloon catheter provided by the present invention can reduce the inconvenience caused by the indwelling push tube, and is suitable for the treatment of multi-stage lumen stenosis.

Description

Separable balloon catheter

Technical Field

The invention relates to the technical field of medical instruments, in particular to a detachable balloon catheter with a detachable balloon.

Background

The saccule catheter is one kind of medical intervention apparatus and may be used mainly in dilating treatment of human body's canal stenosis, such as airway, digestive tract, blood vessel, urinary tract, etc. The conventional balloon catheter structure mostly comprises a catheter body and a balloon arranged on the side wall of the distal end of the proximal catheter body, the balloon is positioned at the narrow part of the lumen by inserting the catheter body into the lumen of a patient, and the narrow part of the lumen can be expanded after the balloon is inflated, so that the treatment effect is achieved.

In the balloon dilatation treatment process, the balloon is usually required to be kept at a narrow part of the lumen of a human body for a certain time, and in the balloon catheter in the prior art, the catheter body is required to be kept along with the balloon, but the retention of the catheter body occupies a certain lumen space and influences blood flow, so that the subsequent operation in the lumen of the human body is not facilitated to be continued; and the existing balloon catheter is difficult to treat the condition of multi-section stenosis in the same lumen.

Disclosure of Invention

Based on the above, the invention provides the detachable balloon catheter with the detachable balloon, which solves the inconvenience caused by the retention of the catheter body in the treatment of the lumen stenosis.

The present invention aims to provide a detachable balloon catheter comprising a push tube and at least one expansion assembly, the push tube having an elongated tubular structure; the expansion assembly comprises support tubes, a balloon and balloon inflation tubes, and the pushing tubes are sequentially and detachably connected with the support tubes of the expansion assemblies along the axial direction; the balloon is wound on the outer wall of the supporting tube; the distal end of the balloon inflation tube is fixedly connected with the supporting tube and communicated with the balloon inner cavity, and the balloon inflation tube of each expansion assembly can axially extend to the proximal end of the balloon catheter along the outer wall of the pushing tube; after the balloon inflation tubes are axially tightened and fixedly connected to the pushing tube, the pushing tube and the expansion assemblies form a fixed integral structure, and after the fixed connection between the balloon inflation tubes and the pushing tube is released, the expansion assemblies can be sequentially released.

Further, the balloon catheter comprises an expansion assembly, a containing cavity with an opening facing to the end wall of the proximal end is arranged in the supporting tube, and the distal end of the pushing tube is inserted into the containing cavity.

Further, a groove extending along the axial direction is formed in the outer wall of the pushing tube, and the groove is used for accommodating the balloon inflation tube.

Further, the balloon catheter further comprises a fixing piece, wherein the fixing piece is used for detachably and fixedly connecting the balloon inflation tube to the pushing tube.

Further, the fixing piece is of an annular structure, and a notch penetrating from inside to outside and along the axial direction is formed in the side wall of the fixing piece; the fixing piece is sleeved on the pushing tube, and the balloon inflation tube can be arranged in the fixing piece in a penetrating manner through the notch or removed from the fixing piece.

Further, a first guide wire cavity extending along the axial direction is arranged in the pushing tube; the support tube is internally provided with a second guide wire cavity and an inflation cavity which are axially arranged, and the second guide wire cavity penetrates to the far end of the support tube; when the pushing tube is inserted into the accommodating cavity of the supporting tube, the second guide wire cavity is aligned with the first guide wire cavity, the inflating cavity is aligned with the groove, and the balloon inflating tube is communicated with the inflating cavity; and the side wall of the supporting tube is provided with an inflation hole, and the inflation hole is communicated with the inflation cavity and the balloon.

Further, a convex displacement preventing point is arranged on the side wall of the pushing tube, and when the pushing tube is inserted into the accommodating cavity, the displacement preventing point is located at the proximal end of the supporting tube and used for abutting against the supporting tube.

Further, at least one group of anti-displacement points is provided, each group of anti-displacement points is multiple, and each group of anti-displacement points is uniformly distributed on the side wall of the pushing pipe along the circumferential direction; each group of displacement prevention points are axially distributed on the side wall of the pushing pipe, and a certain interval is reserved between the two groups of displacement prevention points.

Further, the distal end of the support tube is tapered in a radial dimension gradually decreasing, and is made of an elastic material.

Further, the balloon comprises a supporting part, a first cone part and a second cone part, wherein the distal end of the first cone part is connected with the proximal end of the supporting part, and the proximal end is connected with the tube wall of the supporting tube; the proximal end of the second cone part is connected with the distal end of the supporting part, and the proximal end of the second cone part is connected with the pipe wall of the supporting pipe; the radial dimension of the support portion increases gradually from the proximal end to the distal end after the balloon is inflated.

According to the separable balloon catheter provided by the invention, the inflatable balloon is wound on the outer wall of the supporting tube, and the pushing tube is separated after the balloon is inflated, so that inconvenience caused by retention of the pushing tube can be reduced, the blocking effect on blood flow can be avoided, and the follow-up operation is facilitated; in addition, the separable balloon catheter provided by the invention is particularly suitable for the condition that a plurality of narrow parts exist in the same lumen, and compared with the multi-balloon catheter provided by the prior art, the balloon implantation position can be adjusted, so that the treatment is more targeted.

Drawings

Fig. 1 is a schematic view of the structure of a detachable balloon catheter according to a first embodiment of the present invention.

Fig. 2 is an assembly view of the detachable balloon catheter in the first embodiment.

Fig. 3 is a cross-sectional view of the components of the detachable balloon of the first embodiment taken along the axis.

Fig. 4 is a schematic structural view of the fixing member in the first embodiment.

Detailed Description

The present invention will be described in further detail with reference to the drawings and embodiments, in order to make the objects, technical solutions and advantages of the present invention more apparent. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In the present specification, the end of the detachable balloon catheter, which is close to the operator, is defined as a proximal end and the end, which is far away from the operator, is defined as a distal end during the operation.

Referring to fig. 1 to 3, a first embodiment of the present invention provides a detachable balloon catheter 10 comprising a push tube 11, a support tube 12, a balloon 13 and a balloon inflation tube 14, said push tube 11 having an elongate tubular structure, the balloon being deliverable into a lumen of a patient's body during a procedure by manipulating its proximal end; the supporting tube 12 is coaxially arranged with the pushing tube 11, and the proximal end of the supporting tube is detachably connected to the distal end of the pushing tube 11; the balloon 13 is wound on the outer wall of the support tube 12; the distal end of the balloon inflation tube 14 is fixedly connected with the support tube 12 and communicated with the inner cavity of the balloon 13, and the balloon 13 can be inflated into the balloon 13 through the balloon inflation tube 14 so as to expand the balloon 13; the balloon inflation tube 14 may extend axially along the outer wall of the push tube 11 to the proximal end of the detachable balloon catheter 10, and after the balloon inflation tube 14 is tightened axially, the push tube 11 and the balloon inflation tube 14 are relatively fixed at a position close to the proximal end, so that the push tube 11 and the support tube 12 can be kept fixedly connected; after the relative fixation of the pushing tube 11 and the balloon inflation tube 14 is released, the pushing tube 11 is moved axially and proximally relative to the balloon inflation tube 14, so that the pushing tube 11 can be separated from the support tube 12.

In the present invention, the connection between the pushing tube 11 and the supporting tube 12 may be made by abutting the distal end of the pushing tube 11 with the proximal end of the supporting tube 12; or can be mutually sleeved.

In this embodiment, a receiving cavity 121 with an opening facing the proximal end wall is disposed in the supporting tube 12, and the distal end of the pushing tube 11 is inserted into the receiving cavity 121.

The detachable balloon catheter 10 provided in this embodiment is used for the following steps of dilating a lumen of a patient's body: (1) The balloon inflation tube 14 is tightened along the axial direction and fixed relative to the push tube 11, so that the support tube 12 and the push tube 11 are tightly abutted, and the separable balloon catheter 10 has a fixed integral structure; (2) The detachable balloon catheter 10 is inserted into the inner lumen of a patient body, and after the balloon 13 is conveyed to a narrow part, the balloon 13 is inflated through the balloon inflation tube 14 so as to expand the narrow part of the lumen; (3) Releasing the relative fixation between the balloon inflation tube 14 and the pushing tube 11, and pulling the pushing tube 11 out of the body to separate the pushing tube 11 from the supporting tube 12, wherein the balloon 13 and the supporting tube 12 can be remained in the lumen of the patient; (4) After the lumen stricture is completed, the balloon 13 is contracted by deflating the balloon inflation tube 14, and the support tube 12 and the balloon 13 can be recovered by pulling the balloon inflation tube 14 from the proximal end to the outside.

The invention is provided with the separable pushing tube and the supporting tube, the inflatable balloon is wound on the outer wall of the supporting tube, and the pushing tube is separated after the balloon is inflated, so that the inconvenience caused by the retention of the pushing tube can be reduced, and the follow-up operation is facilitated; in addition, the separable balloon catheter provided by the invention is especially suitable for the condition that a plurality of narrow parts exist in the same lumen, and compared with the multi-balloon catheter provided by the prior art, the balloon implantation position can be adjusted at will, so that the treatment is more targeted.

Preferably, the radial dimension of the receiving cavity 121 is slightly larger than the radial dimension of the distal end of the pushing tube 11. The scheme is beneficial to the separation of the pushing tube 11 and the supporting tube 12 in the operation process, and avoids the displacement of the supporting tube 12 and the saccule 13 caused by the fact that the pushing tube 11 is taken out when the pushing tube 11 is connected with the supporting tube 12 too tightly.

In this embodiment, an axially extending groove is formed on the outer wall of the pushing tube 11, and the groove is used for accommodating the balloon inflation tube 14. The balloon inflation tube 14 can be limited by the scheme, and discomfort of a patient caused by deflection of the balloon inflation tube can be avoided.

Further, the detachable balloon catheter 10 further comprises a fixing member 15, and the fixing member 15 is used for detachably and fixedly connecting the balloon inflation tube 14 to the pushing tube 11.

In this embodiment, referring to fig. 4, the fixing member 15 has an annular structure, and a notch 151 extending from inside to outside and along an axial direction is formed in a side wall of the fixing member; the fixing piece 15 is sleeved on the pushing tube 11, and the balloon inflation tube 14 can be inserted into the fixing piece 15 or removed from the fixing piece 15 through the notch 151.

In this embodiment, the size of the notch 151 is preferably larger than the diameter of the balloon inflation tube 14 and smaller than the diameter of the push tube 11. Firstly, sleeving the fixing piece 15 on the pushing tube 11 from any one end, then penetrating the balloon inflation tube 14 into the fixing piece 15 through the notch 151, rotating the fixing piece 15 until the notch 151 deviates from the balloon inflation tube 14, and realizing the relative fixation of the balloon inflation tube 14 and the pushing tube 11; after the implantation of the balloon 13 is completed, the fixing piece 15 is rotated until the notch 151 is opposite to the balloon inflation tube 14, so that the balloon inflation tube 14 is separated from the notch 151, and the separation of the balloon inflation tube 14 and the pushing tube 11 can be realized.

Further, referring to fig. 3, the push tube 11 has a first guide wire lumen 111 extending in an axial direction; the support tube 12 is internally provided with a second guide wire cavity 122 and an inflation cavity 123 which are axially arranged, and the second guide wire cavity 122 penetrates to the distal end of the support tube 12; when the pushing tube 11 is inserted into the accommodating cavity 121 of the supporting tube 12, the second guide wire cavity 122 is aligned with the first guide wire cavity 111, the inflating cavity 123 is aligned with the groove, and the balloon inflating tube 14 is communicated with the inflating cavity 123; and the side wall of the supporting tube is provided with an inflation hole which is communicated with the inflation cavity and the balloon 13.

Further, a protruding anti-displacement point 112 is provided on the side wall of the pushing tube, and when the pushing tube 11 is inserted into the accommodating cavity 121, the anti-displacement point 112 is located at the proximal end of the supporting tube 12 and is used for abutting against the supporting tube 12. According to the scheme, the displacement prevention point is arranged, so that the support tube 12 can be prevented from moving towards the proximal end relative to the push tube 11; while increasing the friction between the balloon catheter 10 and the lumen of the human body.

The anti-displacement points 112 may have a plurality of groups, each group of anti-displacement points 112 may be one or more, and each group of anti-displacement points 112 is uniformly distributed on the side wall of the push tube 11 along the circumferential direction; the groups of anti-displacement points 112 are axially distributed on the side wall of the push pipe 11 with a certain interval therebetween. According to the scheme, the push pipe can be cut according to actual requirements, so that the push pipe has different specifications.

In this embodiment, the pushing tube 11 is formed by extruding high-hardness Pebax, TPU or PVC material; the anti-displacement points 112 are formed by a dispensing process.

Further, a connector 113 is provided at the proximal end of the pushing tube 11, and the connector 113 is used for connecting with medical devices such as a syringe.

Further, an inflation connector 141 is provided at the proximal end of the balloon inflation tube 14, and the balloon 13 can be inflated through the inflation connector 141.

Further, the distal end of the support tube 12 is tapered in a radial dimension gradually decreasing, and is made of an elastic material. The present approach can reduce stimulation to the patient lumen.

Further, the balloon 13 includes a support portion 131, a first taper portion 132 and a second taper portion 133, wherein a distal end of the first taper portion 132 is connected to a proximal end of the support portion 131, and a proximal end is connected to a wall of the support tube 12; the proximal end of the second cone 133 is connected to the distal end of the support portion 131, and the proximal end is connected to the pipe wall of the support pipe 12; after inflation of the balloon 13, the support 131 increases in radial dimension from the proximal end to the distal end.

Preferably, the distal radial diameter of the support 131 is 1 to 3 mm greater than the proximal radial diameter. This scheme can increase the frictional force between sacculus and the patient lumen.

Further, the balloon 13 is made of an elastic polymer developing material.

The balloon catheter provided by the invention is used for treating lumen stenosis, and is especially suitable for treating multiple stenosis of the lumen of a human body. Specifically, the balloon catheter provided by the invention is used for treating a plurality of stenosis in a lumen of a human body, and firstly, the balloon is conveyed to the stenosis at the farthest position of the lumen through a pushing tube; after releasing the balloon, the push tube is removed, and a second balloon and support tube structure is secured to the push tube for the next stricture to be dilated.

The second embodiment of the invention provides another separable balloon catheter, which comprises a push tube, a first expansion assembly and a second expansion assembly, wherein the first expansion assembly comprises a first supporting tube, a first balloon and a first balloon inflation tube; the second expansion assembly includes a second support tube, a second balloon, and a second balloon inflation tube. The difference from the first embodiment is that the first supporting tube is sleeved with the pushing tube, and the first expansion assembly and the pushing tube are relatively fixed by fixing the first balloon inflation tube on the pushing tube; the proximal end of the second supporting tube is sleeved with the distal end of the first supporting tube, and the second expansion assembly, the first expansion assembly and the pushing tube are relatively fixed by fixing the second balloon inflation tube on the pushing tube.

The separable saccule catheter provided by the embodiment is used for treating lumen stenosis, and the operation steps are as follows: firstly, operating a pushing tube to convey the second saccule to a stenosis at the farthest position of a lumen of a patient for expansion; after releasing the second expansion assembly, moving the pushing tube to convey the first balloon to a second stenosis of the lumen of the patient for expansion; and after releasing the first expansion assembly, recovering the pushing tube.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims

1. A detachable balloon catheter comprising a push tube and at least one expansion assembly, the push tube having an elongated tubular structure; the expansion assembly comprises support tubes, a balloon and balloon inflation tubes, and the pushing tubes are sequentially and detachably connected with the support tubes of the expansion assemblies along the axial direction; the balloon is wound on the outer wall of the supporting tube; the distal end of the balloon inflation tube is fixedly connected with the supporting tube and communicated with the balloon inner cavity, and the balloon inflation tube of each expansion assembly can axially extend to the proximal end of the balloon catheter along the outer wall of the pushing tube; after the balloon inflation tubes are axially tensioned and fixedly connected to the pushing tube, the pushing tube and the expansion assemblies form a fixed integral structure, and after the fixed connection between the balloon inflation tubes and the pushing tube is released, the expansion assemblies can be sequentially released.

2. The detachable balloon catheter of claim 1, wherein the balloon catheter comprises an expansion assembly, wherein a receiving cavity is provided in the support tube with an opening toward the proximal end wall, and wherein the distal end of the push tube is inserted into the receiving cavity.

3. The detachable balloon catheter according to claim 2, wherein an axially extending groove is provided on the outer wall of the push tube, the groove being for receiving the balloon inflation tube.

4. The detachable balloon catheter of claim 3, further comprising a securing member for detachably and fixedly connecting the balloon inflation tube to the push tube.

5. The separable balloon catheter according to claim 4, wherein the fixing member has an annular structure, and the side wall of the fixing member is provided with a notch penetrating from inside to outside and along the axial direction; the fixing piece is sleeved on the pushing tube, and the balloon inflation tube can be arranged in the fixing piece in a penetrating manner through the notch or removed from the fixing piece.

6. The detachable balloon catheter of claim 3, wherein the push tube has a first guidewire lumen extending axially therein; the support tube is internally provided with a second guide wire cavity and an inflation cavity which are axially arranged, and the second guide wire cavity penetrates to the far end of the support tube; when the pushing tube is inserted into the accommodating cavity of the supporting tube, the second guide wire cavity is aligned with the first guide wire cavity, the inflating cavity is aligned with the groove, and the balloon inflating tube is communicated with the inflating cavity; and the side wall of the supporting tube is provided with an inflation hole, and the inflation hole is communicated with the inflation cavity and the balloon.

7. The detachable balloon catheter of claim 3, wherein a protruding anti-displacement point is provided on the push tube sidewall, the anti-displacement point being located at a proximal end of the support tube for abutting the support tube when the push tube is inserted into the receiving lumen.

8. The detachable balloon catheter of claim 7, wherein at least one set of anti-displacement points, each set of anti-displacement points having a plurality of anti-displacement points, each set of anti-displacement points being circumferentially uniformly distributed on the push tube sidewall; each group of displacement prevention points are axially distributed on the side wall of the pushing pipe, and a certain interval is reserved between the two groups of displacement prevention points.

9. The detachable balloon catheter of claim 3, wherein the distal end of the support tube is tapered in a radial dimension and is made of an elastic material.

10. The detachable balloon catheter of claim 3, wherein the balloon comprises a support portion, a first taper and a second taper, a distal end of the first taper being connected to a proximal end of the support portion, the proximal end being connected to a wall of the support tube; the proximal end of the second cone part is connected with the distal end of the supporting part, and the proximal end of the second cone part is connected with the pipe wall of the supporting pipe; the radial dimension of the support portion increases gradually from the proximal end to the distal end after the balloon is inflated.