CN216571147U - Balloon catheter - Google Patents

Abstract

A balloon catheter, which belongs to the field of medical appliances. Mainly constitute by stereoplasm head end, sacculus, inner tube, outer tube and pipe seat, the stereoplasm head end gomphosis in the inner tube distal end, outer tube and sacculus are connected and wholly cup joint in the inner tube outer wall, and the pipe seat is inserted simultaneously to the near-end of inner tube and outer tube, and the inner tube inner chamber forms the thread guide chamber with the inner chamber intercommunication of pipe seat body, and intermediate layer and the pipe seat branch road tube inner chamber intercommunication between inner tube and the outer tube form the sufficient chamber that is linked together with the sacculus. The balloon catheter can deal with complex vascular environment, can smoothly reach a diseased part by utilizing the hard head end, realizes balloon expansion at the diseased part through the matching structure of the inner tube, the outer tube and the catheter seat, and achieves the purpose of opening blood vessels.

Description

Balloon catheter

Technical Field

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

Background

Atherosclerosis can cause stenosis or occlusion of blood vessels, thereby leading to various vascular diseases. The clinical manifestations of vascular occlusion of lower limbs mainly include intermittent claudication, ischemia of lower limbs, etc., and in severe cases, tissue ulcer and necrosis of lower limbs may be caused, which seriously affects the health of people.

The treatment of lower limb vascular occlusion requires the use of an intraluminal treatment technique to open the occluded vessel and restore the blood supply to the vessel. Current methods of intraluminal treatment include balloon dilatation, stent implantation, atherectomy, laser angioplasty, and the use of drug thrombolytic therapy or thrombectomy, among others. Among them, the balloon dilatation is a treatment method in which a balloon catheter is introduced into a predetermined vascular site and expanded, and is currently widely used clinically.

However, because of the strong resistance of patients to vascular occlusion in the lower extremities, their vascular status is often not ideal at the time of medical care, often accompanied by severe vascular stenosis and calcification. When such lesions are treated, the conventional balloon catheter often encounters great resistance in the conveying process, is difficult to reach a predetermined blood vessel part, and cannot smoothly achieve the purpose of opening the blood vessel.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a balloon catheter suitable for treating lower limb vascular occlusion.

The technical scheme adopted by the utility model is as follows: the utility model provides a sacculus pipe, its technical essential is, mainly by the stereoplasm head end, the sacculus, the inner tube, outer tube and pipe seat are constituteed, stereoplasm head end gomphosis is in the inner tube distal end, outer tube distal end and sacculus near-end are connected and wholly cup joint in inner tube outer wall, the sacculus distal end links to each other with the inner tube distal end, the inner tube inserts the pipe seat simultaneously with the near-end of outer tube and links to each other with the pipe seat, the inner tube inner chamber forms the silk guide chamber that supplies the seal wire to pass through with the inner chamber intercommunication of pipe seat body, intermediate layer between inner tube and the outer tube and pipe seat branch pipe inner chamber intercommunication form the sufficient chamber that supplies outside liquid to pass through, the sacculus expands after obtaining the liquid of being carried by sufficient chamber and acts on vascular inner wall.

In the scheme, the inner pipe is of a three-layer tubular structure and comprises an inner pipe layer, an inner pipe middle layer and an inner pipe outer layer which are sequentially sleeved together from inside to outside, wherein the far end of the inner pipe middle layer is connected with the near end of a hard head end, the hard head end is connected with the inner pipe layer and the inner pipe outer layer in a hot pressing mode, and the hard head end is integrally embedded between the inner pipe layer and the inner pipe outer layer; the proximal end of the middle layer of the inner tube serves as a connecting end for connecting with a catheter hub.

In the scheme, the inner layer and the outer layer of the inner tube are made of polymers, and the middle layer of the inner tube is a metal layer.

In the scheme, at least two developing marks are further arranged on the outer layer of the inner tube.

In the scheme, the catheter base comprises a catheter base body with a guide wire port, a branch pipe with a filling port and a stress relief pipe, wherein an inner cavity of the catheter base body is formed by sequentially communicating a first inner cylindrical section, a second inner cylindrical section, a transition section, a third inner cylindrical section, a first inner circular truncated cone section and a fourth inner cylindrical section, wherein the inner diameters of the first inner cylindrical section, the second inner cylindrical section and the third inner cylindrical section are sequentially reduced, the first inner circular truncated cone section is minimized so that the near end of an inner pipe inserted into the inner cavity of the catheter base is limited and fixed in the third inner cylindrical section and is communicated with the third inner cylindrical section to form a guide wire cavity for a guide wire to pass through; the inner diameter of the first inner circular truncated cone section is increased after reaching the minimum, and the inner diameter of the first inner circular truncated cone section reaches the maximum in the fourth inner circular truncated cone section and is used as a guide wire port for leading a guide wire to enter the catheter holder body; the first inner cylindrical section protrudes out of the far end of the catheter seat body and forms a clamping and fixing structure with the stress removing pipe so as to fix the positions of the inner pipe and the outer pipe, and an interlayer between the inner pipe and the outer pipe is communicated with the inner cavity of the branch pipe to form a filling cavity; the branch pipe inner chamber is communicate in proper order by round platform section and the interior cylinder section of fifth in the second and constitutes, round platform section distal end and the interior cylinder section intercommunication of second in the second, the near-end and the sufficient port intercommunication of cylinder section in the fifth so that outside liquid pours into the pipe seat body into through sufficient port.

In the above scheme, the hard head end comprises a hard head end body and a body extension section, and a gap is arranged on the body extension section.

In the above scheme, the gaps are diamond-shaped gaps arranged at uniform intervals.

In the above scheme, the gap is a strip shape with two smooth ends, and is obliquely and alternately arranged at the upper end and the lower end of the extension section of the body.

In the above scheme, the gap is a long strip with smooth two ends, and is vertically arranged at the upper end and the lower end of the extension section of the body at intervals.

In the above scheme, the hard head end comprises a hard head end body and a body extension section, and the body extension section is spiral.

The utility model has the beneficial effects that: the balloon catheter mainly comprises a hard head end, a balloon, an inner tube, an outer tube and a catheter seat, wherein the hard head end is embedded at the far end of the inner tube, the outer tube and the balloon are connected and integrally sleeved on the outer wall of the inner tube, the near ends of the inner tube and the outer tube are simultaneously inserted into the catheter seat, the inner cavity of the inner tube is communicated with the inner cavity of the catheter seat body to form a wire guide cavity, and an interlayer between the inner tube and the outer tube is communicated with the inner cavity of a branch tube of the catheter seat to form a filling cavity communicated with the balloon. The balloon catheter can deal with complex vascular environment, can smoothly reach a diseased part by utilizing the hard head end, realizes balloon expansion at the diseased part through the matching structure of the inner tube, the outer tube and the catheter seat, and achieves the purpose of opening blood vessels.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of a balloon catheter in an embodiment of the utility model;

FIG. 2 is a schematic cross-sectional view of the positional relationship of the inner tube and the outer tube in a balloon catheter in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view of a hard tip of a balloon catheter in accordance with example 1 of the present invention;

FIG. 4 is a schematic view of a hard tip of a balloon catheter in accordance with example 2 of the present invention;

FIG. 5 is a schematic view of a hard tip of a balloon catheter in accordance with example 3 of the present invention;

FIG. 6 is a schematic view of a hard tip of a balloon catheter in accordance with example 4 of the present invention;

FIG. 7 is a schematic view of the connection between the rigid tip and the inner tube of the balloon catheter according to the embodiment of the present invention;

FIG. 8 is a schematic view of two visualization markers in a balloon catheter in an embodiment of the utility model;

FIG. 9 is a schematic illustration of three visualization markers in a balloon catheter in an embodiment of the utility model;

FIG. 10 is a schematic view of a catheter hub according to an embodiment of the present invention;

FIG. 11 is a schematic view of the connection of the catheter hub to the proximal end of the balloon catheter in an embodiment of the present invention;

in the figure, 1 is a hard head end, 2 is a balloon, 3 is an inner tube, 4 is an outer tube, 5 is a catheter holder, 6 is a guide wire cavity, 7 is an filling cavity, 11 is a hard head end body, 12 is a body extension section, 13 is a gap, 31 is an inner tube inner layer, 32 is an inner tube middle layer, 33 is an inner tube outer layer, 34 is a development mark, 51 is a catheter holder body, 52 is a branch tube, 53 is a filling port, 54 is a guide wire port, 55 is a stress-removing tube, 56 is a first inner cylindrical section, 57 is a second inner cylindrical section, 58 is a transition section, 59 is a third inner cylindrical section, 510 is a first inner cylindrical section, 511 is a fourth inner cylindrical section, 512 is a second inner cylindrical section, and 513 is a fifth inner cylindrical section.

Detailed Description

The above objects, features and advantages of the present invention will become more apparent, and the present invention will be described in further detail with reference to fig. 1 to 11 and the following detailed description.

For convenience of description, the term "distal" as used herein refers to the end of the instrument distal from the operator, and the term "proximal" refers to the end of the instrument proximal to the operator.

Example 1:

the sacculus pipe in this embodiment, mainly by stereoplasm head end 1, sacculus 2, inner tube 3, outer tube 4 and pipe seat 5 are constituteed, stereoplasm head end 1 gomphosis is in the 3 distal ends of inner tube, the 4 distal ends of outer tube and 2 near-ends of sacculus are connected and wholly cup joint in the 3 outer walls of inner tube, 2 distal ends of sacculus link to each other with the 3 distal ends of inner tube, the near-end of inner tube 3 and outer tube 4 inserts pipe seat 5 simultaneously and links to each other with pipe seat 5 through the mode that bonds, the inner chamber intercommunication of inner tube 3 inner chamber and pipe seat body 51 forms the silk guide wire chamber 6 that supplies the seal wire to pass through, intermediate layer and pipe seat branch pipe 52 inner chamber intercommunication between inner tube 3 and the outer tube 4 form the sufficient chamber 7 that supplies outside liquid to pass through, sacculus 2 and sufficient chamber 7 intercommunication expand after obtaining the liquid of being carried by sufficient chamber. The hard tip 1 used in this embodiment is made of hard materials, including but not limited to metal and hard plastic. The hard material is used as the head end, which is beneficial for the balloon catheter to pass through the position of angiostenosis and calcification, and ensures that the balloon can reach the predetermined vascular position.

The inner tube 3 adopted in this embodiment is a three-layer tubular structure, and includes an inner tube layer 31, an inner tube middle layer 32, and an inner tube outer layer 33, wherein the inner tube layer 31 and the inner tube outer layer 33 are made of polymer, and the inner tube middle layer 32 is a metal layer and can be formed by weaving metal wires. The specific structure of the inner tube 3 is: the inner pipe middle layer 32 is sleeved outside the inner pipe inner layer 31, and the inner pipe outer layer 33 is sleeved outside the inner pipe middle layer 32. The far end of the inner tube middle layer 32 is connected with the near end of the hard head end 1, the hard head end 1 in the embodiment is composed of a hard head end body 11 and a body extension section 12, diamond-shaped gaps 13 which are formed by laser cutting and are evenly distributed are arranged on the body extension section 12, the embodiment utilizes a hot pressing mode, after the outer tube is heated, the material of the outer tube penetrates through the polymers of the inner tube inner layer 31 and the inner tube outer layer 33 to enter the diamond-shaped gaps 13, the hard head end 1 is simultaneously connected with the inner tube inner layer 31 and the inner tube outer layer 33, and the hard head end 1 is integrally embedded between the inner tube inner layer 31 and the inner tube outer layer 33.

The present embodiment provides at least two development marks on the inner tube outer layer 33 for development positioning under X-ray.

The catheter hub 5 in this embodiment is comprised of a catheter hub body 51 with a guidewire port 54, a bypass tube 52 with a filling port 53, and a destressing tube 55. The inner cavity of the catheter seat body 51 is formed by sequentially communicating a first inner cylindrical section 56, a second inner cylindrical section 57, a transition section 58, a third inner cylindrical section 59, a first inner circular truncated cone section 510 and a fourth inner cylindrical section 511, wherein the inner diameters of the first inner cylindrical section 56, the second inner cylindrical section 57 and the third inner cylindrical section 59 are sequentially reduced, and the first inner circular truncated cone section 510 is minimized so that the proximal end of the inner tube 3 inserted into the inner cavity of the catheter seat 5 is limited and fixed in the third inner cylindrical section 59 and communicated with the third inner cylindrical section 59 to form a guide wire cavity 6 for a guide wire to pass through. The inner diameter of the first inner circular truncated segment 510 increases after it reaches a minimum and reaches a maximum at the fourth inner cylindrical segment 511 and serves as a guidewire port 54 for a guidewire to enter the catheter hub body 51. The first inner cylindrical section 56 projects from the distal end of the catheter hub body 51 and forms a snap-fit connection with the stress relief tube 55 to secure the proximal end of the outer tube 4, in this embodiment the stress relief tube 55, to prevent the portion of the outer tube 4 near the catheter hub 5 from buckling due to stress concentration. The interlayer between the inner tube 3 and the outer tube 4 is communicated with the inner cavity of the branch tube 52 to form a filling cavity 7. The lumen of the branch tube 52 of the present embodiment is formed by sequentially communicating the second inner circular truncated cone section 512 and the fifth inner cylindrical section 513, the distal end of the second inner circular truncated cone section 512 communicates with the second inner cylindrical section 57, and the proximal end of the fifth inner cylindrical section 513 communicates with the filling port 53 so that the external liquid is injected into the catheter hub body 51 through the filling port 53. The inner diameter of the first inner cylindrical section 56, the second inner cylindrical section 57 and the transition section 58 is slightly larger than the outer diameter of the inner tube 3, and the formed gap is communicated with the interlayer between the inner tube 3 and the outer tube 4, namely the filling cavity 7, so that the liquid flowing from the filling port 53 can enter the filling cavity 7 and enter the balloon 2 through the filling cavity 7, and the balloon 2 is expanded.

The balloon catheter in the embodiment has the working process that:

after the guide wire is inserted into a patient body and is in place, the near end of the guide wire is inserted into the guide wire cavity from the hard head end of the balloon, then the balloon is pushed along the guide wire to enter the human body and reach a preset part, then liquid is injected through the filling port, the balloon is expanded after the liquid enters the filling cavity and acts on a diseased part, and the opening of a blood vessel is realized.

Example 2:

the present embodiment is different from embodiment 1 in that the gap 13 is a long strip with two smooth ends, and is disposed above and below the body extension section 12, and the long gap 13 above and the long gap 13 below are disposed at an interval. The hard tip 1 is also connected to the inner tube inner layer 31 and the inner tube outer layer 33 at the same time by the gap 13, and the entire hard tip 1 is fitted between the inner tube inner layer 31 and the inner tube outer layer 33.

Example 3:

the present embodiment is different from embodiment 1 in that the gap 13 is a strip with two smooth ends, and is obliquely disposed above and below the body extension section 12, and the upper strip gap 13 and the lower strip gap 13 are disposed at an interval. The hard tip 1 is also connected to the inner tube inner layer 31 and the inner tube outer layer 33 at the same time by the gap 13, and the entire hard tip 1 is fitted between the inner tube inner layer 31 and the inner tube outer layer 33.

Example 4:

this embodiment differs from embodiment 1 in that the body extension 12 is laser cut to form a spiral shape. The hard tip 1 is also connected to the inner tube inner layer 31 and the inner tube outer layer 33 at the same time by the gap 13, and the entire hard tip 1 is fitted between the inner tube inner layer 31 and the inner tube outer layer 33.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. The utility model provides a sacculus pipe, a serial communication port, mainly by the stereoplasm head end, the sacculus, the inner tube, outer tube and pipe seat are constituteed, stereoplasm head end gomphosis is in the inner tube distal end, outer tube distal end and sacculus near-end are connected and wholly cup joint in inner tube outer wall, the sacculus distal end links to each other with the inner tube distal end, the inner tube inserts the pipe seat simultaneously with the near-end of outer tube and links to each other with the pipe seat, the inner tube inner chamber forms the silk guide chamber that supplies the seal wire to pass through with the inner chamber intercommunication of pipe seat body, intermediate layer and pipe seat branch pipe inner chamber intercommunication between inner tube and the outer tube form the sufficient chamber that supplies outside liquid to pass through, the sacculus expands after obtaining the liquid of being carried by sufficient chamber and acts on vascular inner wall.

2. The balloon catheter according to claim 1, wherein the inner tube has a three-layer tubular structure, and comprises an inner tube layer, an intermediate tube layer and an outer tube layer which are sequentially sleeved together from inside to outside, wherein the distal end of the intermediate tube layer is connected with the proximal end of the hard head end, and the hard head end is connected with the inner tube layer and the outer tube layer in a hot-pressing manner and integrally embedded between the inner tube layer and the outer tube layer; the proximal end of the middle layer of the inner tube serves as a connecting end for connecting with a catheter hub.

3. The balloon catheter of claim 2 wherein the inner tube inner layer and the inner tube outer layer are comprised of a polymer and the inner tube middle layer is a metal layer.

4. The balloon catheter of claim 2 wherein at least two visualization marks are further disposed on the outer layer of the inner tube.

5. A balloon catheter according to any one of claims 1 to 4, wherein the catheter holder is composed of a catheter holder body with a guide wire port, a bypass tube with a filling port and a stress relief tube, the catheter holder body inner cavity is composed of a first inner cylindrical section, a second inner cylindrical section, a transition section, a third inner cylindrical section, a first inner circular truncated cone section and a fourth inner cylindrical section which are sequentially communicated, wherein the inner diameters of the first inner cylindrical section, the second inner cylindrical section and the third inner cylindrical section are sequentially reduced, the first inner circular truncated cone section is minimized to enable the proximal end of the inner tube inserted into the catheter holder inner cavity to be limited and fixed in the third inner cylindrical section and communicated with the third inner cylindrical section to form a guide wire cavity for the guide wire to pass through; the inner diameter of the first inner circular truncated cone section is increased after reaching the minimum, and the inner diameter of the first inner circular truncated cone section reaches the maximum in the fourth inner circular truncated cone section and is used as a guide wire port for leading the guide wire to enter the catheter holder body; the first inner cylindrical section protrudes out of the far end of the catheter seat body and forms a clamping and fixing structure with the stress removing pipe so as to fix the positions of the inner pipe and the outer pipe, and an interlayer between the inner pipe and the outer pipe is communicated with the inner cavity of the branch pipe to form a filling cavity; the branch pipe inner chamber is formed by communicating in proper order second inner circular truncated cone section and fifth inner cylinder section, and second inner circular truncated cone section distal end and second inner cylinder section intercommunication, the near-end and the sufficient port intercommunication of fifth inner cylinder section so that outside liquid pours into pipe seat body into through sufficient port.

6. The balloon catheter of claim 1 wherein said hard tip comprises a hard tip body and a body extension, said body extension having a void.

7. The balloon catheter of claim 6 wherein said voids are diamond shaped voids evenly spaced.

8. The balloon catheter according to claim 6, wherein the gap is a long strip with two rounded ends, and the gaps are obliquely and alternately arranged at the upper and lower ends of the extension section of the body.

9. The balloon catheter of claim 6, wherein the gap is a long strip with two rounded ends, and is vertically spaced at the upper and lower ends of the extension section of the body.

10. A balloon catheter according to claim 1 wherein said hard tip comprises a hard tip body and a body extension, said body extension being helical.

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