CN219804126U

CN219804126U - Balloon catheter

Info

Publication number: CN219804126U
Application number: CN202320295419.9U
Authority: CN
Inventors: 孔斌; 王平; 叶文滔; 袁子濠
Original assignee: Shenzhen Yeapro Industrial Co ltd
Current assignee: Shenzhen Yeapro Industrial Co ltd
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-10-10
Anticipated expiration: 2033-02-14

Abstract

The present utility model provides a balloon catheter comprising: a conduit; a balloon disposed at a distal end of the catheter; the guide wire is used for guiding the balloon to move in the blood vessel and penetrates through the catheter; and the flow guiding structure is used for communicating blood flow at two ends of the balloon when the balloon is positioned in the blood vessel, and the flow guiding structure is arranged on the balloon. According to the balloon catheter provided by the utility model, the guide structure is arranged on the balloon, so that when the balloon expands in a blood vessel, blood at two ends of the balloon can circulate, the myocardial blood supply of a patient is ensured to be normal, the balloon can expand for a plurality of minutes, and enough time is provided for treating the blood vessel.

Description

Balloon catheter

Technical Field

The utility model belongs to the technical field of interventional medical instruments, and particularly relates to a balloon catheter.

Background

PCI (Percutaneous Coronary Intervention), percutaneous coronary therapy, is a method of interventional therapy for coronary heart disease, and comprises: coronary balloon dilation, stent implantation, rotational atherectomy, aspiration of thrombus, etc., with balloon dilation being the most common method. The balloon is expanded by selecting femoral artery or radial artery, firstly delivering guide wire to target vascular site, injecting contrast medium to define narrow site, then delivering balloon to narrow site, and making balloon inflated to expand narrow site so as to attain the goal of treatment.

When the existing balloon catheter is used for dilating vascular stenosis, blood flow at the distal end of the blood vessel is interrupted, and myocardial blood supply of a patient is insufficient, so that life danger is brought to the patient; secondly, when performing surgery, vascular perforation or dissection may also result from mishandling or disease of the patient's own blood vessels. At present, no better coronary blood flow and myocardial guarantee measures are available except for medicaments for reducing myocardial oxygen consumption, stabilizing plaque, inhibiting platelet function and monitoring means. If a conventional balloon catheter is used to occlude a vessel puncture, the flow of blood within the vessel is completely interrupted when the balloon is inflated; for effective treatment of perforations, it may be necessary to occlude the vessel for up to several minutes, while interruption of blood flow for up to several minutes can present a significant risk to the patient's life.

Disclosure of Invention

The embodiment of the utility model aims to provide a balloon catheter, which solves the technical problem that the blood flow in a blood vessel is blocked in the balloon catheter expanding process in the prior art, so that life hazard is brought to a patient.

In order to achieve the above object, the present utility model provides a balloon catheter, comprising:

a conduit;

a balloon disposed at a distal end of the catheter;

the guide wire is used for guiding the balloon to move in the blood vessel and penetrates through the catheter; the method comprises the steps of,

the flow guiding structure is used for communicating blood flow at two ends of the balloon when the balloon is positioned in the blood vessel, and the flow guiding structure is arranged on the balloon.

By adopting the technical scheme, when the balloon catheter is used for interventional treatment of vascular diseases in the prior art, the blood flow at the two ends of the balloon can be blocked when the balloon is expanded in the blood vessel, so that the balloon cannot flow to the far end of the blood vessel, the myocardial blood supply is insufficient, and the life of a patient is greatly dangerous; according to the utility model, the guide structure is arranged on the balloon, and the guide structure is communicated with the two ends of the balloon, so that blood in a blood vessel flows to the far end of the blood vessel through the guide structure, the normal myocardial blood supply of a patient is ensured, and the risk of threatening the life of the patient by using the balloon catheter is reduced.

In some embodiments, the flow directing structure is a tube disposed along a length of the catheter.

Through adopting above-mentioned technical scheme, the direction that the siphunculus set up is unanimous with blood flow direction, the blood of being convenient for flows through the siphunculus.

In some embodiments, the number of the through tubes is a plurality, the plurality of the through tubes being circumferentially arranged around the balloon.

Through adopting above-mentioned technical scheme, a plurality of siphunculus can accelerate the circulation of sacculus both ends blood.

In some embodiments, a plurality of the tubes are arranged in an annular array.

Through adopting above-mentioned technical scheme, annular array distributes, makes the interval between every siphunculus unanimous, realizes evenly distributed in the blood vessel, and the blood of being convenient for in the blood vessel evenly circulates, reduces the possibility that blood flow is obstructed.

In some embodiments, the end of the tube is provided with a bevel, which is inclined from the middle of the tube to the direction of the bevel, towards the direction approaching the catheter.

Through adopting above-mentioned technical scheme, can make things convenient for the sacculus to get into the blood vessel, avoid siphunculus and the wall of blood vessel to take place to scratch and lead to the condition emergence that blood vessel perforation or intermediate layer were peeled off.

In some embodiments, the through pipe is embedded in the balloon, the end of the balloon is connected with the end of the through pipe, and an opening communicated with the through pipe is formed in the position, corresponding to the end of the through pipe, on the balloon.

By adopting the technical scheme, the balloon can be tightly attached to the wall of the blood vessel when being arranged in the balloon for expanding, and the function of expanding the blood vessel of the balloon is improved.

In some embodiments, the catheter comprises a first outer tube connected to the balloon and an inner tube penetrating the first outer tube, wherein one end of the inner tube near the balloon penetrates out of one end of the balloon away from the first outer tube, and the guide wire penetrates into the inner tube.

Through adopting above-mentioned technical scheme, the inner tube is used for the seal wire to pass and guide whole sacculus pipe to remove, and the one end of sacculus links to each other with first outer tube, inputs the filling thing to the sacculus through first outer tube, makes the sacculus expand.

Optionally, a first positioning ring is arranged on the outer wall of the inner tube.

By adopting the technical scheme, the vascular lesion is positioned by matching with the input contrast agent.

In some embodiments, the catheter comprises a first outer tube connected with the balloon and an inner tube penetrating in the first outer tube, one end of the inner tube close to the balloon penetrates out of one end of the balloon away from the first outer tube, and the guide wire penetrates in the inner tube.

By adopting the technical scheme, the catheter is convenient to push in the blood vessel.

In some embodiments, a lumen is formed between the first outer tube and the inner tube in communication with the balloon, and the catheter further includes a second outer tube in communication with an end of the lumen remote from the balloon.

By adopting the technical scheme, the balloon is convenient for the filling matters to enter so as to expand so as to dilate the blood vessel.

In some embodiments, the second outer tube comprises a first tube section connected at one end to the first outer tube and a second tube section connected at one end to the other end of the first tube section; the second tube section is provided with a second positioning ring for determining the position of the balloon in the blood vessel.

By adopting the technical scheme, the position of the saccule in the blood vessel can be accurately determined.

In some embodiments, the other end of the second pipe section is provided with a pipe seat, and the pipe seat is provided with an interface for inputting filling materials.

By adopting the technical scheme, the balloon is expanded by inputting the filling objects such as normal saline, contrast agent and the like through the interface, and the contrast agent is input to be matched with the positioning ring to position the vascular stenosis or the vascular perforation.

In some embodiments, the balloon catheter further comprises a stress buffer mounted at the junction of the second tube segment and the hub.

By adopting the technical scheme, the pipe body is used for buffering the stress between the pipe seat and the pipe body, and the connection strength of the pipe seat and the pipe body is enhanced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a balloon catheter according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the balloon catheter shown in FIG. 1;

FIG. 3 is a schematic view of the distal portion of the balloon catheter shown in FIG. 1;

FIG. 4 is a schematic view of the proximal portion of the balloon catheter shown in FIG. 1;

FIG. 5 is a cross-sectional view of the distal portion of the balloon catheter shown in FIG. 3;

FIG. 6 is a cross-sectional view of the tube of FIG. 5;

fig. 7 is a side view of a distal portion of a balloon catheter according to another embodiment of the present utility model.

Wherein, each reference numeral in the figures,

10. a conduit; 11. an inner tube; 111. a first positioning ring; 12. a first outer tube; 13. a second outer tube; 131. a first pipe section; 1311. a rapid exchange port; 132. a second pipe section; 1321. a second positioning ring; 14. a lumen;

20. a balloon;

30. a guide wire;

40. a flow guiding structure; 400. an inclined plane;

50. a tube seat; 51. an interface;

60. stress buffers.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

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

The balloon catheter of the present utility model is closer to the operation end and farther from the operation end along the longitudinal direction thereof. Referring to fig. 1, a balloon catheter according to an embodiment of the present utility model includes a catheter 10, a balloon 20, a guide wire 30, and a guide structure 40; the balloon 20 is arranged at the distal end of the catheter 10, the guide wire 30 penetrates through the catheter 10, and the flow guiding structure 40 is arranged on the balloon 20; the guide wire 30 is used for guiding the balloon 20 to move in the blood vessel, and the flow guiding structure 40 is used for communicating blood flow at both ends of the balloon 20.

When the balloon catheter is used, firstly, the catheter 10 enters a vascular stenosis or a vascular perforation under the guidance of the guide wire 30, then, a filling material is input into the balloon 20 through the catheter 10 to expand the balloon 20, so that the balloon 20 dilates the vascular stenosis or seals the vascular perforation, and at the moment, the flow guide structures 40 on the balloon 20 are communicated with the two ends of the balloon 20, so that blood flow at the two ends of the balloon 20 is circulated, and the normal myocardial blood supply is ensured; the blood vessel can be expanded for a plurality of minutes, and the sufficient time is provided for treating the perforation of the blood vessel.

In one embodiment of the present utility model, referring to fig. 1 and 3, the flow guiding structure 40 is a tube, which is disposed along the length direction of the catheter 10. This arrangement facilitates smooth passage of blood flow through the tube.

Optionally, the through pipe is made of nylon materials, and the good physical and chemical properties and mechanical properties of the nylon materials are utilized, so that the nylon through pipe has a smooth surface and can reduce the resistance between the nylon through pipe and the blood vessel wall; the texture is soft and flexible, and is convenient for adapting to the shape of the blood vessel.

In one embodiment of the present utility model, referring to fig. 3 and 5, the number of the through tubes is plural, and the plural through tubes are circumferentially arranged around the balloon 20. The plurality of through tubes can ensure that enough blood flows through the tube balloon 20 to flow to the distal blood vessel, further ensure that the blood supply to the cardiac muscle is sufficient when the balloon 20 is expanded, and the normal function of the heart is not affected.

In one embodiment of the present utility model, referring to fig. 3 and 5, a plurality of through pipes are arranged in an annular array. This arrangement allows blood at one end of the balloon 20 to flow evenly through the tube to the other end of the balloon 20, reducing the likelihood of blood flow blockage.

Optionally, a plurality of through pipes are arranged side by side. The advantage of this arrangement is that when treating a vascular perforation, the balloon 20 with the tube is placed away from the vascular perforation, so that the balloon 20 is fully inflated to close the vascular perforation, and blood flow can only flow from the tube on the opposite side of the vascular perforation to the distal blood vessel, thus alleviating internal bleeding.

In one embodiment of the present utility model, referring to fig. 5 and 6, the end of the tube is provided with a slope 400, and the slope 400 is inclined from the middle of the tube to the direction of the slope 400 toward the direction approaching the catheter 10. The advantage of setting up like this is that in making the siphunculus get into the blood vessel more easily, avoids the tip of siphunculus to scratch with the blood vessel wall and causes the condition emergence of blood vessel intermediate layer fracture or perforation.

Alternatively, the ends of the balloon 20 are disposed obliquely, specifically, the direction from the middle to the ends of the balloon 20 is disposed obliquely toward the direction approaching the catheter 10. Making it easier for balloon 20 to enter the blood vessel.

Optionally, the tube is bonded to the outer surface of the balloon 20. The operation is simple during the assembly, and the stable attachment of the through pipe on the surface of the saccule 20 can be ensured not to fall off. In other embodiments, the tube and balloon 20 may also be integrally formed.

In one embodiment of the present utility model, referring to fig. 7, the through tube is embedded in the balloon 20, the end of the balloon 20 is connected to the end of the through tube, and an opening communicating with the through tube is formed on the balloon 20 at a position corresponding to the end of the through tube. The through pipe is embedded in the balloon 20, so that the balloon 20 can be fully attached to the vessel wall when being expanded, and the vascular puncture is closed and the vascular stenosis is fully expanded.

In one embodiment of the present utility model, referring to fig. 2 and 3, the catheter 10 includes an inner tube 11 and a first outer tube 12, the first outer tube 12 is connected to the balloon 20, and the inner tube 11 is disposed through the first outer tube 12; the end of the inner tube 11 close to the balloon 20 passes out of the end of the balloon 20 far from the first outer tube 12, and the guide wire 30 passes through the inner tube 11. This facilitates the passage of the guidewire 30 through the inner tube 11 and guides the movement of the entire catheter 10 of the balloon 20, one end of the balloon 20 being connected to the first outer tube 12, and the balloon 20 being inflated by the input of inflation through the first outer tube 12 into the balloon 20. In embodiments of the utility model, the filling is bio-physiological saline and contrast agent; in other application embodiments, balloon 20 may also be inflated by injecting air.

Alternatively, one end of the balloon 20 is connected to one end of the first outer tube 12, and the other end of the balloon 20 is connected to the wall of the inner tube 11; the entire balloon 20 is wrapped around the inner tube 11. This ensures the sealability of the balloon 20.

Optionally, referring to fig. 3, a first positioning ring 111 is disposed on a wall of the inner tube 11, and the first positioning ring 111 is located in the balloon 20. The first positioning ring 111 realizes the position positioning of the lesion blood vessel in cooperation with the contrast agent inputted through the first outer tube 12 and evaluates the expansion effect of the lesion. Optionally, the first positioning ring 111 is made of metallic platinum to facilitate positioning of the diseased vessel for use with contrast agents.

In one embodiment of the present utility model, referring to fig. 2 to 4, the catheter 10 further includes a second outer tube 13; a lumen 14 is formed between the first outer tube 12 and the inner tube 11, the lumen 14 being in communication with the balloon 20, and the second outer tube 13 being in communication with an end of the lumen 14 remote from the balloon 20. Facilitating entry of the filling material into balloon 20 through lumen 14, and inflating balloon 20 to occlude the vessel puncture or treat the vessel stenosis.

In one embodiment of the present utility model, referring to fig. 2 to 4, the second outer tube 13 includes a first tube segment 131 and a second tube segment 132, one end of the first tube segment 131 is connected to the first outer tube 12, and the other end of the first tube segment 131 is connected to the second tube segment 132; a second retaining ring 1321 is provided on the second tube segment 132, the second retaining ring 1321 being used to determine the position of the balloon 20 in the blood vessel. Facilitating accurate determination of the specific location of balloon 20. Alternatively, the second tube segment 132 is formed from 304 stainless steel material and the second tube segment 132 is coated with a polytetrafluoroethylene coating. Optionally, the number of second positioning rings 1321 is multiple to facilitate positioning the balloon catheter at different distances in the blood vessel. Optionally, the second retaining ring 1321 is a two-point marker that is not coated with polytetrafluoroethylene coating, directly exposing the 304 stainless steel to the outside. In the embodiment of the present utility model, the distance from the distal end of the balloon catheter to the second positioning ring 1321 is 90cm from the left to the right of the first second positioning ring 1321, and the distance from the distal end of the balloon catheter to the second positioning ring 1321 is 100cm of the second positioning ring 1321, and in other embodiments, different distances are also possible, which mainly plays a role in positioning.

Alternatively, the first tube segment 131 and the first outer tube 12 are integrally formed, and the second tube segment 132 and the first tube segment 131 are connected by lap joint or welding, so that the overall mechanical strength of the balloon catheter can be improved, and the operability and pushability can be improved. Optionally, the second tube segment 132 is a hypotube, primarily facilitating pushing of the balloon catheter.

Optionally, a quick-change port 1311 is formed in the first tube segment 131, and the quick-change port 1311 is configured for insertion of the guidewire 30. Facilitating the pushing of catheter 10 within the blood vessel.

In one embodiment of the present utility model, referring to fig. 2 and 4, a tube holder 50 is mounted at the other end of the second tube section 132, and a connector 51 is provided on the tube holder 50, and the connector 51 is used for inputting filling and contrast agent. The socket 50 is conveniently connected to an external device such as a syringe.

In one embodiment of the present utility model, the balloon catheter further includes a stress buffer 60, the stress buffer 60 being mounted at the junction of the second tube segment 132 and the hub 50. The connection stress of the tube holder 50 and the second tube section 132 can be relieved and the connection strength of both can be enhanced.

Alternatively, the balloon 20 of the present utility model is made of one or more of polyurethane, nylon, or nylon elastomers. The surface activity of polyurethane, nylon or nylon elastomer is utilized, so that the resistance between the material and the wall of the blood vessel is reduced.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A balloon catheter, comprising:

a conduit;

a balloon disposed at a distal end of the catheter;

2. The balloon catheter of claim 1, wherein the flow directing structure is a tube disposed along a length of the catheter.

3. The balloon catheter of claim 2, wherein the number of said tubes is a plurality, a plurality of said tubes being circumferentially arranged around said balloon.

4. A balloon catheter according to claim 3, wherein a plurality of said tubes are arranged in an annular array.

5. The balloon catheter of claim 2, wherein the end of the tube is provided with a bevel, the bevel being inclined from the middle of the tube to the bevel in a direction toward the catheter.

6. The balloon catheter of claim 2, wherein the tube is embedded in the balloon, the end of the balloon is connected to the end of the tube, and an opening communicating with the tube is formed in the balloon at a position corresponding to the end of the tube.

7. The balloon catheter of any of claims 1-6, wherein the catheter comprises a first outer tube connected to the balloon and an inner tube threaded into the first outer tube, an end of the inner tube proximal to the balloon passing out of an end of the balloon distal to the first outer tube, and the guidewire threaded into the inner tube.

8. The balloon catheter of claim 7, wherein a lumen is formed between the first outer tube and the inner tube in communication with the balloon, the catheter further comprising a second outer tube in communication with an end of the lumen remote from the balloon.

9. The balloon catheter of claim 8, wherein the second outer tube comprises a first tube segment connected at one end to the first outer tube and a second tube segment connected at one end to the other end of the first tube segment; the second tube section is provided with a second positioning ring for determining the position of the balloon in the blood vessel.

10. The balloon catheter of claim 9, wherein a hub is mounted to the other end of the second tube segment, the hub having an interface for filling material input.