Catheter special for kiss

Abstract

The invention provides a catheter special for kiss, which comprises a catheter main body, a spacer and a balloon, and the catheter main body comprises a hose section; the partition piece is arranged in the hose section and divides the interior of the hose section into a kiss cavity and a containing cavity, and the kiss cavity is used for a guide wire to penetrate through; the balloon is arranged in the containing cavity, the partition piece is driven by inflation and deflation to deform so as to adjust the cross sectional area of the kiss cavity, and therefore the guide wire is guided to penetrate through the kiss cavity, the butt joint process of the guide wire and the micro catheter is greatly simplified, operation time is shortened, and the risk of vascular injury caused by difficult operation is reduced.

Description

Technical Field

[0001] The present invention relates to the field of vascular interventional treatment instruments, and in particular to a catheter dedicated to kissing. Background Art

[0002] Chronic total occlusion (CTO) refers to a complete blockage of a coronary artery segment for more than three months. Due to the long-term occlusion, hard fibrosis or calcification may form within the vessel. Currently, CTO revascularization methods include both forward and retrograde techniques.

[0003] The forward technique involves inserting a guidewire proximally (closest to the cardiac entry point) through the CTO lesion, attempting to directly traverse the occluded segment to the distal normal vessel. If the occluded segment is long, heavily calcified, or has a complex morphology, the guidewire may not be able to find the correct path.

[0004] When the forward technique fails, the retrograde technique is an important means. In the retrograde technique, a guidewire is inserted retrogradely from the distal end of the CTO lesion through the collateral circulation, passed through the occluded segment, and then into the forward guiding catheter to finally complete the revascularization. Currently, the common methods to complete this step are: The kissing microcatheter technique (forward guidewire through retrograde microcatheter): After the retrograde guidewire carries the microcatheter through the lesion and into the forward guiding catheter, the forward guidewire is passed from the forward microcatheter into the retrograde microcatheter. Due to the extremely small inner diameter of the microcatheter tip, precise guidewire insertion is extremely difficult, time-consuming, and has a low success rate.

[0005] The kissing technique of the retrograde microcatheter (retrograde guidewire through the antegrade microcatheter): When the retrograde guidewire passes through the lesion but the retrograde microcatheter cannot, the antegrade microcatheter captures the retrograde guidewire within the guiding catheter and passes it through, then pushes the microcatheter to the distal end of the lesion. This procedure also faces the problem of difficult kissing between the guidewire and microcatheter. Summary of the Invention

[0006] The purpose of the present invention is to address the deficiencies in the prior art and provide a special catheter for kissing, which simplifies the docking process between the guidewire and the microcatheter through structural optimization, thereby improving the success rate and efficiency of CTO retrograde interventional treatment.

[0007] In order to achieve the above object, the present invention provides the following technical solutions: A special catheter for kissing, comprising: a catheter body, the catheter body comprising a hose segment; a partition, the partition being arranged inside the hose segment to separate the inside of the hose segment into a kissing cavity and a receiving cavity, the kissing cavity being used for the guide wire to pass through; A balloon is arranged in the accommodating cavity, and drives the partition to deform by inflation and deflation to adjust the cross-sectional area of ​​the kissing cavity, thereby guiding the guide wire to pass through the kissing cavity.

[0008] As a preferred embodiment, both side edges of the partition are respectively connected to the inner wall of the hose section.

[0009] As a preferred embodiment, the front end of the spacer is connected to the inner wall of the hose segment, and a gap is left between the rear end of the spacer and the inner wall of the hose segment for the balloon rod to pass through.

[0010] As a preferred embodiment, the distance from the front end to the rear end of the partition defines the length of the kissing cavity, and the length of the kissing cavity is 3-7 cm.

[0011] As a preferred embodiment, the catheter body is further provided with: a front inner cavity, the front inner cavity communicating with the front end surface of the hose segment and the kissing cavity; A rear inner cavity is connected to the kissing cavity and the rear end face of the hose section.

[0012] As a preferred embodiment, it also includes: A balloon rod, one end of which is connected to the balloon, and the other end of which passes through the rear end surface of the hose section for connecting to a pressure pump.

[0013] As a preferred embodiment, the catheter body further includes: A metal segment is connected to the rear end surface of the hose segment.

[0014] As a preferred embodiment, it also includes: A catheter handle is connected to the metal segment.

[0015] As a preferred embodiment, the spacer is made of opaque material for positioning under X-ray.

[0016] Compared with the existing technology, this technical solution has the following advantages: Before the kissing operation, the balloon is not inflated, the cross-sectional area of ​​the kissing cavity is large, and the guidewire can be easily inserted; during the kissing operation, the balloon is inflated, the cross-sectional area of ​​the kissing cavity is reduced, the guidewire is constrained and guided, and it can dock with the microcatheter more accurately, which greatly simplifies the docking process of the guidewire and microcatheter, reduces the operation time, reduces the risk of vascular damage caused by operation difficulties, and improves the success rate and efficiency of CTO retrograde interventional treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the kissing-only catheter of the present invention.

[0018] In the figure: 100 is the catheter body, 110 is the hose section, 120 is the metal section, 200 is the spacer, 300 is the balloon, 400 is the balloon rod, 500 is the catheter handle, 101 is the kissing cavity, 102 is the accommodating cavity, 103 is the front inner cavity, and 104 is the rear inner cavity. DETAILED DESCRIPTION

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0020] Please refer to Figure 1 The present invention provides a special kissing catheter, which aims to solve the problem of difficult kissing between the guidewire and the microcatheter in the existing retrograde interventional treatment of chronic total occlusion (CTO) of the coronary artery, including: The catheter body 100 includes a hose section 110; A partition 200 is provided inside the hose section 100 to separate the inside of the hose section 100 into a kissing cavity 101 and an accommodating cavity 102 , wherein the kissing cavity 101 is used for the guidewire to pass through; The balloon 300 is disposed in the accommodating cavity 102 , and drives the partition 200 to deform by inflation and deflation to adjust the cross-sectional area of ​​the kissing cavity 101 , thereby guiding the guide wire to penetrate the kissing cavity 101 .

[0021] Before the kissing operation, the balloon 300 is not inflated, and the cross-sectional area of ​​the kissing cavity 101 is large, so the guidewire can be easily inserted into the kissing cavity 101, which reduces the difficulty of guidewire insertion and avoids the problem of guidewire penetration difficulty caused by the small inner diameter of the microcatheter head. During the kissing operation, by inflating the balloon 300, the cross-sectional area of ​​the kissing cavity 101 is reduced, and the guidewire is subject to certain constraints and guidance in a smaller space, which can be more accurately docked with the microcatheter, greatly improving the success rate of the kissing. This design of adjusting the cross-sectional area of ​​the kissing cavity 101 by inflating and deflating the balloon 300 simplifies the docking process between the guidewire and the microcatheter, reduces the operation time and operation difficulty, and reduces the surgical risk, thereby effectively solving the problem of difficulty in kissing the guidewire and the microcatheter in the prior art, and improving the success rate and efficiency of CTO reverse interventional treatment.

[0022] like Figure 1As shown, the flexible tube segment 110 has good flexibility and biocompatibility, and can flexibly pass through the blood vessel to reduce damage to the blood vessel wall. The flexible tube segment 110 can be made of polyurethane (PU) or silicone rubber.

[0023] like Figure 1 As shown, the catheter body 100 further includes: The metal segment 120 is connected to the rear end surface of the hose segment 110 .

[0024] The metal segment 120 can provide a certain supporting strength to ensure the stability of the catheter during operation and facilitate the doctor's precise control. The metal segment 120 can be made of stainless steel, nickel-titanium alloy, etc.

[0025] The cross-sectional area of ​​the metal segment 120 is smaller than that of the hose segment 110 . The metal segment 120 is connected to the wall of the hose segment 110 and does not interfere with the guide wire passing through the hose segment 110 .

[0026] like Figure 1 As shown, the kiss-only catheter further includes: The catheter handle 500 is connected to the metal segment 120 .

[0027] The metal segment 120 is connected between the catheter handle 500 and the rear end surface of the flexible tube segment 110. The doctor can operate the entire catheter by holding the catheter handle 500, for example, pushing the flexible tube segment 110 forward and backward.

[0028] like Figure 1 As shown, the two side edges of the spacer 200 are respectively connected to the inner wall of the hose section 110. The front end of the spacer 200 is connected to the inner wall of the hose section 110, and a gap is left between the rear end of the spacer 200 and the inner wall of the hose section 110 for the balloon rod to pass through.

[0029] The spacer 200 has a gap between its rear end and the hose section 110. The spacer's two side edges and front end are connected to the inner wall of the hose section 110. Thus, the balloon 300 can be placed between the spacer 200 and one side of the inner wall of the hose section 100, while the other side of the inner wall of the hose section 100 and the spacer 200 form the kissing cavity 101.

[0030] The spacer 200 is made of an opaque material that can be clearly visualized under X-rays, facilitating accurate positioning of the catheter's internal structure during surgery, allowing for more precise guidewire manipulation. Furthermore, the spacer 200 is also made of an elastic material to adapt to elastic deformation during inflation and deflation of the balloon 300. For example, the spacer 200 can be made of a material that is a mixture of a metal contrast agent, such as barium sulfate, zirconium dioxide, or iodide, and a medical polymer, such as polyurethane, polyetheretherketone, or polylactic acid, resulting in a spacer 200 that is both X-ray opaque and elastic.

[0031] The spacer 200 and the hose section 110 are connected by hot-melt welding.

[0032] like Figure 1 As shown, the distance from the front end to the rear end of the partition 200 defines the length of the kissing cavity 101. The length of the kissing cavity 101 is 3-7 cm, preferably 5 cm.

[0033] like Figure 1 As shown, the spacer 200 is located in the middle of the length direction of the hose section 110, that is, the catheter body 100 is further provided with: A front inner cavity 103, wherein the front inner cavity 103 is connected to the front end surface of the hose segment 110 and the kissing cavity 101; The rear inner cavity 104 is connected to the kissing cavity 101 and the rear end surface of the hose section 110.

[0034] The front inner cavity 103 and the rear inner cavity 104 provide a complete channel for the guide wire to pass through. The guide wire can pass through the front inner cavity 103 and perform a kissing operation in the kissing cavity 101, or a reverse operation.

[0035] like Figure 1 As shown, the kiss-only catheter further includes: The balloon rod 400 has one end connected to the balloon 300 and the other end passing through the rear end surface of the hose section 110 for connecting to a pressure pump.

[0036] The balloon rod 400 can pass through the rear inner cavity 104 and exit from the rear end surface of the hose section 110. The end of the balloon rod 400 can be connected to a pressure pump and an exhaust pipe via a three-way valve. By rotating the valve core of the three-way valve, the gas flow direction can be changed to achieve inflation and exhaust switching.

[0037] In inflation mode, the three-way valve is adjusted to the inflation position, connecting the pressure pump to the balloon shaft 400 and closing the exhaust port. The pressure pump is then operated, allowing gas to pass through the balloon shaft 400 and into the balloon 300 for inflation. By operating the pressure pump, the inflation pressure and volume of the balloon 300 can be precisely controlled, thereby precisely adjusting the deformation of the septum 200 and, in turn, accurately controlling the cross-sectional area of ​​the kissing cavity 101.

[0038] In exhaust mode, the three-way valve is adjusted to the exhaust position, so that the exhaust pipe is connected to the balloon rod 400, and the pressure pump is turned off. At this time, the gas in the balloon 300 is exhausted through the balloon rod 400.

[0039] like Figure 1 As shown, part of the balloon rod 400 may be disposed on the metal segment 120 , and the end of the balloon rod 400 is staggered from the end of the metal segment 120 , and the end of the balloon rod 400 is connected to the pressure pump.

[0040] The method of using the kissing catheter is as follows: During the CTO retrograde interventional treatment, the doctor first delivers the flexible tube segment 110 to a designated position through a blood vessel.

[0041] Before the guidewire and the microcatheter are docked, the balloon 300 is kept in an uninflated state, and the guidewire is inserted from the front end of the hose segment 110 through the front inner cavity 103 into the kissing cavity 101, and the front end of the guidewire is inserted into the kissing cavity 101.

[0042] During kissing, the balloon 300 is inflated by connecting the balloon rod 400 to a pressure pump, and the cross-sectional area of ​​the kissing cavity 101 is adjusted so that the guide wire is precisely docked with the microcatheter to complete the kissing operation.

[0043] After the kiss is successful, subsequent surgical operations such as blood supply reconstruction will be carried out.

[0044] During the entire operation, the doctor can flexibly operate the catheter through the catheter handle 500 and accurately locate the catheter under X-rays by utilizing the light-proof property of the partition 200 to ensure the smooth progress of the operation.

[0045] In the prior art, whether it is a forward guidewire passing through a retrograde microcatheter or a retrograde guidewire passing through a forward microcatheter, both face the problem of small inner diameter of the microcatheter tip, high difficulty in accurately inserting the guidewire, long time consumption and low success rate. At the same time, the operation is cumbersome and may damage blood vessels. However, the kissing-specific catheter of the present invention has a large cross-sectional area of ​​the kissing cavity 101 and can easily insert the guidewire before the kissing operation. During the kissing operation, the balloon 300 is inflated, the cross-sectional area of ​​the kissing cavity 101 is reduced, and the guidewire is constrained and guided, docking with the microcatheter more accurately. This greatly simplifies the docking process between the guidewire and the microcatheter, reduces operation time, reduces the risk of vascular damage caused by difficult operation, and improves the success rate and efficiency of CTO retrograde interventional treatment.

[0046] The embodiments described above are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. The scope of the patent application of the present invention cannot be limited by these embodiments alone. That is, any equivalent changes or modifications made according to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims

1. A special catheter for kissing, characterized in that: include: A catheter body (100), the catheter body (100) comprising a hose section (110); a partition (200), the partition (200) being arranged inside the hose section (100) to separate the inside of the hose section (100) into a kissing cavity (101) and a receiving cavity (102), the kissing cavity (101) being used for the guide wire to pass through; The balloon (300) is arranged in the accommodating cavity (102) and drives the partition (200) to deform by inflation and deflation to adjust the cross-sectional area of ​​the kissing cavity (101), thereby guiding the guide wire to pass through the kissing cavity (101).

2. The kiss-only catheter according to claim 1, wherein: Both side edges of the partition (200) are respectively connected to the inner wall of the hose section (110).

3. The kiss-only catheter according to claim 1, wherein: The front end of the spacer (200) is connected to the inner wall of the hose section (110), and a gap is left between the rear end of the spacer (200) and the inner wall of the hose section (110) for the balloon rod to pass through.

4. The kiss-only catheter according to claim 1, wherein: The distance from the front end to the rear end of the partition (200) defines the length of the kissing cavity (101), and the length of the kissing cavity (101) is 3-7 cm.

5. The kiss-only catheter according to claim 1, wherein: The catheter body (100) is further provided with: A front inner cavity (103), the front inner cavity (103) communicating with the front end surface of the hose section (110) and the kissing cavity (101); A rear inner cavity (104), wherein the rear inner cavity (104) is connected to the kissing cavity (101) and the rear end surface of the hose section (110).

6. The kiss-only catheter according to claim 1, wherein: Also includes: A balloon rod (400), one end of which is connected to the balloon (300), and the other end of which passes through the rear end surface of the hose section (110) for connection to a pressure pump.

7. The kiss-only catheter according to claim 1, wherein: The catheter body (100) further comprises: A metal segment (120) is connected to the rear end face of the hose segment (110).

8. The kiss-only catheter according to claim 1, wherein: Also includes: A catheter handle (500) is connected to the metal segment (120).

9. The kiss-only catheter according to claim 1, wherein: The spacer (200) is made of opaque material and is used for positioning under X-rays.

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