Perfusion balloon dilatation catheter with mapping function

Abstract

The utility model provides a perfusion balloon dilatation catheter with a mapping function. The perfusion balloon dilatation catheter comprises a tube seat, a balloon, a guide shaft assembly and a tip tube, the guide shaft assembly comprises a near-end shaft and a far-end shaft, the near-end shaft is a double-cavity shaft, a first cavity and a second cavity which are isolated from each other are formed in the near-end shaft, the first cavity is communicated with the guide wire connector and the liquid injection connector in the tube base, a vertically-penetrating injection hole is formed in the side wall, away from the second cavity, of the first cavity, and the second cavity is communicated with the filling liquid connector in the tube base. The far-end shaft is composed of an inner tube and an outer tube arranged outside the inner tube in a sleeving mode, one end of the inner tube is connected with the opening of the first cavity in a sealed mode, the other end of the inner tube is communicated with the tip tube, one end of the outer tube is connected with the outer wall of the near-end shaft in a sealed mode, and the other end of the outer tube is communicated with the balloon. Expansion and contraction of the balloon can be achieved through the filling liquid connector, developing liquid can be injected to a diseased region through the injection hole by means of the liquid injection connector, and the length of the diseased region of a blood vessel can be measured in real time through the developing ring.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an infusion balloon dilation catheter with mapping function. Background Technology

[0002] Treating vascular stenosis or occlusion is a common vascular disease, affecting approximately 200 million people worldwide. Minimally invasive surgery, such as percutaneous transluminal angioplasty, is commonly used. However, many patients have long lesions requiring multiple angiography sessions and segmented balloon dilation to fully open the vessel. Most existing balloon dilation catheters only dilate the balloon and cannot be used for angiography, leading to multiple catheter exchanges, prolonged procedures, and high costs. Furthermore, stenosis may persist after balloon dilation, necessitating the placement of a length-matched stent. Current balloon dilation catheters also lack the ability to measure the length of vascular stenosis; they can only estimate the approximate length of the lesion using X-ray imaging after contrast agent injection, making the procedure complex and placing a significant metabolic burden on the patient's kidneys due to the large amount of contrast agent. Utility Model Content

[0003] The purpose of this invention is to overcome one or more shortcomings in the prior art and provide an infusion balloon dilation catheter with mapping function.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is an infusion balloon dilation catheter with mapping function, comprising: a tube seat, a balloon, a guide shaft assembly connecting the tube seat and the balloon, and a tip tube that wraps around the end of the guide shaft assembly that passes through the balloon and seals the balloon.

[0005] The guide shaft assembly includes a proximal shaft near the tube seat and a distal shaft near the balloon. The proximal shaft is a dual-cavity shaft, with a first cavity and a second cavity isolated from each other. The first cavity is connected to the guidewire interface and the injection interface on the tube seat. The side wall of the first cavity away from the second cavity has a vertically penetrating injection hole. The second cavity is connected to the filling fluid interface on the tube seat. The distal shaft consists of an inner tube and an outer tube sleeved outside the inner tube. One end of the inner tube is sealed to the opening of the first cavity, and the other end is connected to the tip tube, so that the first cavity is connected to the tip tube through the inner tube. One end of the outer tube is sealed to the outer wall of the proximal shaft, and the other end is connected to the balloon, so that the second cavity is connected to the balloon through the gap between the outer tube and the inner tube. The outer wall of the outer tube has multiple imaging rings spaced at predetermined intervals.

[0006] Preferably, the cross-section of the first cavity is circular.

[0007] More preferably, the opening area of ​​the injection hole is 0.8 to 1.2 times the cross-sectional area of ​​the first cavity.

[0008] More preferably, the cross-section of the second cavity is crescent-shaped, and the second cavity surrounds the outside of the first cavity.

[0009] Preferably, the injection hole is located near the connection between the outer tube and the proximal shaft.

[0010] Preferably, there are multiple injection holes, and the multiple injection holes are equidistantly spaced along the axial direction of the proximal axis.

[0011] Preferably, the end of the inner tube facing the proximal shaft is inserted into and sealed within the opening of the first cavity facing the distal shaft.

[0012] Preferably, the outer wall of the outer tube is flush with and sealed to the outer wall of the proximal shaft.

[0013] More preferably, the outer diameter of the outer tube is smaller than the outer diameter of the proximal shaft, and the end of the outer tube facing the proximal shaft has a gradually inwardly tapering section.

[0014] Preferably, a T-type valve and a one-way valve are also connected to the pipe seat.

[0015] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0016] The perfusion balloon dilation catheter with mapping function provided by this utility model includes a tube seat, a balloon, a guide shaft assembly, and a tip tube. The guide shaft assembly includes a proximal shaft near the tube seat and a distal shaft near the balloon. The proximal shaft is a double-lumen shaft, with a first lumen and a second lumen that are isolated from each other. The first lumen is connected to the guidewire interface and the injection interface on the tube seat. The side wall of the first lumen away from the second lumen has a vertically penetrating injection hole. The second lumen is connected to the filling fluid interface on the tube seat. The distal shaft consists of an inner tube and an outer tube sleeved outside the inner tube. One end of the inner tube is sealed to the opening of the first lumen. The other end is connected to the tip tube, so that the first cavity is connected to the tip tube through the inner tube. One end of the outer tube is sealed to the outer wall of the proximal shaft, and the other end is connected to the balloon, so that the second cavity is connected to the balloon through the gap between the outer tube and the inner tube. The outer wall of the outer tube is provided with multiple contrast rings at set intervals. It can both expand and contract the balloon using the filling fluid interface, and inject contrasting fluid into the lesion site through the injection hole using the injection interface, thereby reducing the amount of contrast agent used and reducing the burden on the patient's kidneys. It can also measure the length of the vascular lesion in real time through the contrast rings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0018] Figure 2 yes Figure 1 Enlarged cross-sectional view along the AA direction.

[0019] Figure 3 yes Figure 1 Enlarged cross-sectional view along the BB direction.

[0020] Figure 4 yes Figure 2 The cross-sectional view along the CC direction only shows the part where the proximal and distal axes connect.

[0021] Among them: 10. Tube seat; 11. T-valve; 12. Check valve; 20. Balloon; 31. Proximal shaft; 311. First cavity; 312. Second cavity; 313. Injection hole; 32. Distal shaft; 321. Inner tube; 322. Outer tube; 323. Gap; 324. Imaging ring; 325. Retracted section; 40. Tip tube. Detailed Implementation

[0022] like Figures 1 to 4 As shown, the perfusion balloon dilation catheter with mapping function provided by this utility model includes: a tube seat 10, a balloon 20, a guide shaft assembly connecting the tube seat 10 and the balloon 20, and a tip tube 40 wrapped around the end of the guide shaft assembly that penetrates the balloon 20 and seals the balloon 20; wherein, the guide shaft assembly includes a proximal shaft 31 near the tube seat 10 and a distal shaft 32 near the balloon 20. The proximal shaft 31 is a double-lumen shaft, and the proximal shaft 31 has a first lumen 311 and a second lumen 312 that are isolated from each other. The first lumen 311 is connected to the guide wire interface and the injection interface on the tube seat 10. The side wall of the first lumen 311 away from the second lumen 312 has a vertically penetrating injection hole 313. The second lumen 312 is connected to the filling fluid interface on the tube seat 10. The distal shaft 32 is formed by the inner... The inner tube 321 and the outer tube 322 sleeved outside the inner tube 321 are combined. One end of the inner tube 321 is sealed to the opening of the first cavity 311, and the other end is connected to the tip tube 40, so that the first cavity 311 is connected to the tip tube 40 through the inner tube 321. The inner diameter of the tip tube 40 matches the outer diameter of the guide wire inserted into the guide wire interface on the tube seat 10. This matching means that when the guide wire passes through the tip tube 40, the guide wire and the tip tube 40 are dynamically sealed. One end of the outer tube 322 is sealed to the outer wall of the proximal shaft 31, and the other end is connected to the balloon 20, so that the second cavity 312 is connected to the balloon 20 through the gap 323 between the outer tube 322 and the inner tube 321. The outer wall of the outer tube 322 is provided with a plurality of imaging rings 324 spaced at a set distance.

[0023] The advantages of this design are that it allows for balloon inflation and contraction through the connection between the second lumen and the balloon, enabling the injection or removal of filling fluid from the filling fluid port. It also allows for the insertion of a guidewire through the guidewire port and the injection of contrast agent through the injection port, with the contrast agent ejected from the injection port, achieving more precise contrast agent infusion without catheter exchange. This reduces the amount of contrast agent used and lessens the burden on the patient's kidneys. Furthermore, the contrast ring on the outer wall allows for accurate measurement of the length of the stenotic portion of the vascular lesion under X-ray imaging, helping doctors to better select the stent length.

[0024] To ensure effective injection and facilitate guidewire insertion, in this embodiment, the first cavity 311 has a circular cross-section, and the second cavity 312 has a crescent-shaped cross-section. The second cavity 312 surrounds the outside of the first cavity. Furthermore, the injection hole 313 is located near the connection between the outer tube 322 and the proximal shaft 31. There are three injection holes 313, which are equidistantly spaced along the axial direction of the proximal shaft. The opening area of ​​the injection hole 313 is preferably 0.8 to 1.2 times the cross-sectional area of ​​the first cavity 311. Specifically, in this embodiment, this ratio is 1.0 times.

[0025] To facilitate the connection between the distal shaft 32 and the proximal shaft 31, in this embodiment, the end of the inner tube 321 facing the proximal shaft 31 is inserted into the opening of the first cavity 311 facing the distal shaft 32 and is sealed to it. The outer wall of the outer tube 322 is flush with the outer wall of the proximal shaft 31 and is sealed to it. Furthermore, the outer diameter of the outer tube 322 is smaller than the outer diameter of the proximal shaft 31, and the end of the outer tube 322 facing the proximal shaft 31 is provided with a gradually inwardly tapering section 325.

[0026] In this embodiment, a T-type valve 11 and a one-way valve 12 are also connected to the pipe seat 10.

[0027] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A perfusion balloon dilation catheter with mapping function, comprising: A tube seat, a balloon, a guide shaft assembly connecting the tube seat and the balloon, and a tip tube that wraps around the end of the guide shaft assembly that extends through the balloon and seals the balloon; characterized in that: The guide shaft assembly includes a proximal shaft near the tube seat and a distal shaft near the balloon. The proximal shaft is a dual-cavity shaft, with a first cavity and a second cavity that are isolated from each other. The first cavity is connected to the guidewire interface and the injection interface on the tube seat. The side wall of the first cavity away from the second cavity has a vertically penetrating injection hole. The second cavity is connected to the filling fluid interface on the tube seat. The distal shaft consists of an inner tube and an outer tube sleeved outside the inner tube. One end of the inner tube is sealed to the opening of the first cavity, and the other end is connected to the tip tube. One end of the outer tube is sealed to the outer wall of the proximal shaft, and the other end is connected to the balloon. The outer wall of the outer tube has multiple imaging rings spaced at predetermined intervals.

2. The perfusion balloon dilation catheter with mapping function according to claim 1, characterized in that: The first cavity has a circular cross-section.

3. The perfusion balloon dilation catheter with mapping function according to claim 2, characterized in that: The opening area of ​​the injection hole is 0.8 to 1.2 times the cross-sectional area of ​​the first cavity.

4. The perfusion balloon dilation catheter with mapping function according to claim 2, characterized in that: The second cavity has a crescent-shaped cross-section and surrounds the outside of the first cavity.

5. The perfusion balloon dilation catheter with mapping function according to claim 1, characterized in that: The injection port is located near the connection between the outer tube and the proximal shaft.

6. The perfusion balloon dilation catheter with mapping function according to claim 1, characterized in that: There are multiple injection holes, which are equidistantly spaced along the axial direction of the proximal axis.

7. The perfusion balloon dilation catheter with mapping function according to claim 1, characterized in that: The end of the inner tube facing the proximal shaft is inserted into the opening of the first cavity facing the distal shaft and is sealed to it.

8. The perfusion balloon dilation catheter with mapping function according to claim 1, characterized in that: The outer wall of the outer tube is flush with the outer wall of the proximal shaft and is sealed together.

9. The perfusion balloon dilation catheter with mapping function according to claim 7, characterized in that: The outer diameter of the outer tube is smaller than the outer diameter of the proximal shaft, and the end of the outer tube facing the proximal shaft has a gradually inwardly tapering section.

10. The perfusion balloon dilation catheter with mapping function according to claim 1, characterized in that: The pipe seat is also connected to a T-type valve and a one-way valve.

Images