Bending-adjustable angiographic catheter with intraoperative plugging function

Abstract

The bending-adjustable angiographic catheter with the intraoperative plugging function comprises a catheter body, a connector, a bending adjusting handle, a straightener and a strain release sleeve, the catheter body comprises a front catheter section and a rear catheter section, and the front end of the front catheter section is bent; the joint is connected with the rear end of the rear pipe section; the bending adjusting handle is connected with the front end of the rear pipe section; the straightener comprises a rigid pipe, and the rigid pipe is connected with the rear end of the front pipe section; the strain release sleeve comprises a flexible tube, and the flexible tube is connected between the bending adjusting handle and the rigid tube of the straightener, so that a surgeon is helped to more accurately position a catheter in a vascular interventional operation.

Description

Technical Field

[0001] The utility model relates to the field of angiographic catheters, in particular to an adjustable curved angiographic catheter with an intraoperative blocking function. Background Art

[0002] Aortic dilatation refers to a pathological dilatation of the aorta, represented by aortic dissection and aortic aneurysm. If not promptly and effectively intervened, aortic rupture is likely to occur, posing a direct threat to the patient's life safety. As an interventional minimally invasive surgical method, aortic endovascular repair is currently a commonly used treatment for aortic aneurysm and aortic dissection. Angiography catheters are basic diagnostic medical devices that must be used during vascular interventional surgery.

[0003] Angiography catheter is usually a long polymer material catheter, which is used in the process of angiography. Its main function is to deliver contrast agent to the designated position of the vascular system and produce images of blood vessels under the DSA (Digital Subtraction Angiography) machine, thereby achieving the purpose of angiography.

[0004] Ordinary angiography catheters can only deliver contrast agents, and cannot flexibly adjust the contrast agent dosage and the contrast delivery position. However, accurate positioning is crucial in vascular interventional surgery, which has a direct impact on the surgical plan, balloon size, stent size, etc. At present, the commonly used angiography catheters in clinical practice have a single function, referring to patent CN114632253A, which brings a practical clinical problem: in complex surgeries, angiography catheters are difficult to adapt to different operation requirements, and the intraoperative occlusion operation is cumbersome, which reduces the safety of interventional surgery. Utility Model Content

[0005] The utility model aims to provide an adjustable curved angiography catheter with an intraoperative blocking function in view of the deficiencies in the prior art, and the angiography catheter helps surgeons to more accurately position the catheter during vascular intervention surgery.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An adjustable curved angiography catheter with intraoperative occlusion function, comprising:

[0008] A tube body, the tube body comprising a front tube section and a rear tube section, the front end of the front tube section being bent;

[0009] A joint connected to the rear end of the rear pipe section;

[0010] A bending adjustment handle, wherein the bending adjustment handle is connected to the front end of the rear pipe section;

[0011] A straightener, the straightener comprising a rigid tube connected to the rear end of the front tube section;

[0012] A strain relief sleeve includes a flexible tube connected between the bending adjustment handle and the rigid tube of the straightener.

[0013] As a preferred embodiment, the strain relief sleeve further comprises:

[0014] A strain relief interface is provided between the flexible tube and the bending handle, or between the flexible tube and the straightener.

[0015] As a preferred embodiment, the flexible tube includes three layers, and the hardness of the three layers increases gradually from the inside to the outside.

[0016] As a preferred embodiment, the straightener further comprises:

[0017] A clamp is connected between the rigid tube and the flexible tube of the strain relief sleeve, and the clamp is made of a flexible material.

[0018] As a preferred embodiment, the length of the front pipe section is longer than the length of the rear pipe section.

[0019] As a preferred embodiment, a marking layer is provided on the outer surface of the bending adjustment handle, and different marking layers correspond to different bending angles of the front end of the front tube section.

[0020] As a preferred embodiment, the outer surface of the front pipe section is provided with a hydrophilic coating.

[0021] As a preferred embodiment, one port in the rear end of the rear tube section is connected to a heparin cap, and another port in the rear end of the rear tube section is connected to a connector.

[0022] As a preferred embodiment, the outer diameter of the bending adjustment handle is respectively larger than the outer diameters of the straightener and the strain relief sleeve.

[0023] As a preferred embodiment, the length of the straightener is respectively greater than the length of the bending adjustment handle and the length of the strain relief sleeve.

[0024] Compared with the prior art, this technical solution has the following advantages:

[0025] With the help of the marking layer on the outer surface of the bending adjustment handle, the different bending angles of the front end of the front tube segment can be distinguished for interventional surgery of blood vessels with complex anatomical structures. Through the design of different marking layers and detachable heparin caps, rapid identification of different bending types and convenient intraoperative occlusion operations can be achieved;

[0026] The strain relief sleeve can disperse deformation under external pressure or stress to prevent damage to the catheter, and the straightener can quickly restore the catheter to a linear state after the catheter is bent or twisted, so that when the catheter is used in vascular intervention to cope with complex tortuous vascular structures, the catheter can be adjusted and blocked more safely and quickly, solving the problem of inconvenient operation and insufficient catheter sealing during the use of current angiography catheters in complex vascular intervention surgery.

[0027] The present invention is further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the first embodiment of the adjustable bending angiography catheter with intraoperative occlusion function of the utility model;

[0029] Figure 2 It is a structural schematic diagram of the second embodiment of the adjustable bending angiography catheter with intraoperative occlusion function described in the utility model.

[0030] In the figure: 100 tube body, 110 front tube section, 120 rear tube section, 130 middle tube section, 200 joint, 300 bending handle, 400 straightener, 410 rigid tube, 500 strain relief sleeve, 510 flexible tube, 600 heparin cap, 700 connector. DETAILED DESCRIPTION

[0031] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0032] like Figure 1 and Figure 2 As shown, the adjustable curved angiography catheter with intraoperative occlusion function comprises:

[0033] The tube body 100 includes a front tube section 110 and a rear tube section 120, and the front end of the front tube section 110 is bent;

[0034] A connector 200, wherein the connector 200 is connected to the rear end of the rear pipe section 120;

[0035] A bending handle 300, wherein the bending handle 300 is connected to the front end of the rear pipe section 120;

[0036] A straightener 400, wherein the straightener 400 comprises a rigid tube 410, wherein the rigid tube 410 is connected to the rear end of the front tube section 110;

[0037] The strain relief sleeve 500 includes a flexible tube 510 , and the flexible tube 510 is connected between the bending handle 300 and the rigid tube 410 of the straightener 400 .

[0038] The tube body 100 is hollow, and the contrast agent is introduced through the connector 200 and transported to the designated position of the aorta through the curved portion of the tube body 100. The curved portion of the tube body 100 can smoothly pass through the tortuous part of the blood vessel to ensure smooth navigation and accurate positioning during the operation. The bending adjustment handle 300 serves as a handheld part. The strain release sleeve 500 can disperse deformation under external pressure or stress to prevent damage to the catheter. The straightener 400 can quickly restore the catheter to a linear state after the catheter is bent or twisted, thereby achieving smooth operation during the intraoperative occlusion function and avoiding misoperation. By providing the bending adjustment handle 300, the straightener 400, and the strain release sleeve 500, the function of the catheter is increased to meet different operational requirements.

[0039] like Figure 1 and Figure 2 As shown, the tube body 100 includes a front tube section 110 and a rear tube section 120, and the front tube section 110 and the rear tube section 120 are both hollow and internally connected, so that contrast agents, drugs and other fluids can be transported inside the front tube section 110 and the rear tube section 120. In this embodiment, the front end side wall of the front tube section 110 may not be provided with a side hole, that is, the contrast agent is output through the opening at the front end of the front tube section 110.

[0040] Furthermore, the front tube segment 110 is used to be placed in a body cavity. Specifically, the front end of the front tube segment 110 is inserted into the artery of the patient's thigh or arm, and then the front tube segment 110 is sent to the designated position of the aorta along the blood vessel. At this time, the rear tube segment 120, the joint 200, the bending adjustment handle 300, etc. are located outside the body cavity, so that the contrast agent is transported to the rear tube segment 120 through the joint 200. Since the front tube segment 110 and the rear tube segment 120 are internally connected, the contrast agent enters the front tube segment 110 and is transported to the designated position of the aorta by the front end of the front tube segment 110. Thereafter, the bending adjustment handle 300, etc. can be operated outside the body cavity.

[0041] refer to Figure 1 The length of the front pipe section 110 is much longer than that of the rear pipe section 120 , wherein the rear pipe section 120 is shorter and is used to connect the joint 200 and the bending handle 300 .

[0042] The front end of the front tube section 110 is curved, which can smoothly pass through the tortuous part of the blood vessel, ensuring smooth navigation and accurate positioning during surgery. The bending angles of different catheters may be different, refer to Figure 1 and Figure 2 .

[0043] The tube body 100 may be made of a flexible polymer material to ensure flexibility and durability during surgery. The flexible polymer material includes a silicone-based elastomer and the like.

[0044] Preferably, the outer surface of the front tube section 110 is provided with a hydrophilic coating to increase the lubricity between the catheter and the blood vessel and reduce the trauma to the blood vessel when the front tube section 110 enters or moves out. In this embodiment, the front side of the hydrophilic coating is flush with the front end of the front tube section 110, and the distance between the rear side of the hydrophilic coating and the rear end of the rear tube section 120 is 30 cm. The hydrophilic coating includes polyvinyl pyrrolidone and the like.

[0045] like Figure 1 As shown, the connector 200 can be connected to a pump (not shown) via an external pipeline. The pipeline-connected pump is common in the art. The pump is provided with a valve, a switch, etc., and the opening and closing of the valve are controlled by the switch. When the valve is opened, a fluid such as a contrast agent enters the tube body 100 through the pump and the external pipeline. When the valve is closed, the fluid is prevented from flowing and enters the tube body 100.

[0046] like Figure 1 As shown, the diameters of the front tube section 110 and the rear tube section 120 are approximately equal, while the outer diameter of the bending handle 300 is larger, and the hardness of the bending handle 300 is greater than the hardness of the tube body 100, so that the bending handle 300 can be used as a handheld component. The bending handle 300 is generally columnar, and a chamfer is set on the side of the bending handle 300 facing the straightener 400. The bending handle 300 is used as a handheld component, so the contrast agent can be accurately delivered to the target area by adjusting the angle of the tube body 100 through the bending handle 300.

[0047] The bending adjustment handle 300 may be directly fixed to the outside of the rear pipe section 120 , or the bending adjustment handle 300 may be hollow inside to connect to the rear pipe section 120 .

[0048] The outer surface of the bending handle 300 is provided with a marking layer. Different marking layers correspond to different bending angles of the front end of the front tube section 110. In this way, catheters with different bending angles can be classified by different marking layers. The marking layer is a color coating provided on the outer surface of the bending handle 300. Figure 1 The front end of the front tube section 110 has a large bending angle; see Figure 2The front end bending angle of the front pipe section 110 is small.

[0049] like Figure 1 As shown, the strain relief sleeve 500 can disperse deformation under external pressure or stress to prevent damage to the catheter. The strain relief sleeve 500 includes a connected flexible tube 510 and a strain relief interface, the flexible tube 510 and the straightener 400 are connected through the strain relief interface, and / or a strain relief interface is provided between the flexible tube 510 and the bending handle 300.

[0050] The flexible tube 510 is divided into three layers from the inside to the outside. This design can provide sufficient support and strength while maintaining the flexibility of the catheter. The outer layer of the flexible tube 510 is an elastomer, the middle layer is a stainless steel wire mesh, and the inner layer is polytetrafluoroethylene. While ensuring the flexibility of the flexible tube 510, it can release strain under external pressure or stress. The release interface can also be made of three or two layers of materials with different hardness, wherein the elastomer of the release interface can be polyolefin, etc. The flexible tube 510 and the release interface are both tubular structures, and the outer diameter of the release interface can be smaller than the outer diameter of the flexible tube 510.

[0051] The strain relief sleeve 500 can release strain through the three-layer structure and material properties of different hardness when the catheter is bent or subjected to external forces. This mechanism helps prevent the catheter from being damaged due to excessive bending or stress concentration. When the blocking function is activated, the controllable valve closes quickly to prevent fluid flow, while the strain relief sleeve 500 ensures the stability of the rest of the catheter, thereby effectively improving surgical safety and catheter reliability.

[0052] like Figure 1 As shown, the straightener 400 follows the front tube section 110 into the blood vessel, and includes a rigid tube 410 and a clamp. The rigid tube 410 is connected between the strain relief sleeve 500 and the clamp, and the clamp is connected to the front tube section 110. The clamp can be made of flexible material, and the rigid tube 410 is made of rigid material, and the rigid tube 410 is in a straight line, so that the clamp can fix or release the catheter relative to the rigid tube 410 to adapt to different operation requirements. The straightener 400 can enable the catheter to quickly return to a linear state after the catheter is bent or twisted, thereby achieving smooth operation during the intraoperative occlusion function and avoiding misoperation. The rigid material includes polyamide and polyetheretherketone. The rigid tube 410 and the clamp can both be tubular structures.

[0053] like Figure 1As shown, the tube body 100 further includes a middle tube section 130 , which is connected between the straightener 400 and the strain relief sleeve 500 . The middle tube section 130 is shorter than the front tube section 110 and the rear tube section 120 .

[0054] like Figure 1 and Figure 2 As shown, the outer diameter of the bending handle 300 is respectively greater than the outer diameters of the straightener 400 and the strain relief sleeve 500. The length of the straightener 400 is respectively greater than the length of the bending handle 300 and the strain relief sleeve 500.

[0055] like Figure 1 and Figure 2 As shown, one port in the rear end of the rear tube section 120 is connected to the heparin cap 600 , and the other port in the rear end of the rear tube section 120 is connected to the connector 200 .

[0056] The heparin cap 600 is a matching connector device containing heparin components widely used in the medical field, which further increases the use function of the catheter. The connector 200 and the tube body 100 maintain a straight line, and the heparin cap 600 and the tube body 100 are set at an angle.

[0057] Furthermore, the connector 200 may be a Luer taper, which is a standardized micro-seepage-free connector. A connector 700 is provided at a port in the rear end of the rear tube section 120, and the heparin cap 600 is detachably connected to the connector 700, which may be detachably connected by threading, clamping, etc., and the connector 700 may be semi-circular.

[0058] The contrast medium delivery method of the adjustable curved contrast catheter with intraoperative occlusion function is as follows:

[0059] Step 1: The doctor selects a bending angle suitable for the patient's vascular anatomical structure through the marking layer on the outer surface of the bending adjustment handle 300.

[0060] Step 2: The doctor's hand acts on the bending handle 300 to insert the front end of the front tube segment 110 into the artery at the patient's thigh or arm, and then sends the front tube segment 110 along the blood vessel to the designated position of the aorta. At this time, the rear tube segment 120, the connector 200, the bending handle 300, etc. are located outside the body cavity.

[0061] Step 3: Turn on the pump connected to the connector 200 to introduce contrast agent into the tube body 100 . The contrast agent is transported along the tube body 100 and from the front end of the front tube section 110 to the designated position of the aorta.

[0062] In step two, the stability of the catheter is maintained with the help of the strain relief sleeve 500. At the same time, the straightener 400 and the bend at the front end of the front tube segment 110 can smoothly pass through the tortuous part of the blood vessel, ensuring smooth navigation and accurate positioning during the operation. In situations where the catheter needs to be blocked, the operator can quickly install or remove the heparin cap 600 through the connector 700 to achieve the sealing of the rear end of the rear tube segment 120. Due to its efficient sealing performance, the leakage of contrast agents or drugs can be avoided during the operation, thereby improving the efficiency and safety of the operation. Using the catheter of this embodiment, it is actually possible to achieve safer and more efficient vascular intervention operations, meet the surgical needs under various complex vascular conditions, and provide significant clinical application value.

[0063] The embodiments described above are only used to illustrate the technical ideas and features of the utility model, and their purpose is to enable technicians in this field to understand the content of the utility model and implement it accordingly. The patent application scope of the utility model cannot be limited only by this embodiment, that is, any equivalent changes or modifications made according to the spirit disclosed by the utility model still fall within the patent scope of the utility model.

Claims

1. An adjustable curved angiographic catheter with intraoperative occlusion function, characterized in that: include: A tube body (100), the tube body (100) comprising a front tube section (110) and a rear tube section (120), the front end of the front tube section (110) being bent; A joint (200), the joint (200) being connected to the rear end of the rear pipe section (120); a bending adjustment handle (300), the bending adjustment handle (300) being connected to the front end of the rear pipe section (120); A straightener (400), the straightener (400) comprising a rigid tube (410), the rigid tube (410) being connected to the rear end of the front tube section (110); A strain relief sleeve (500) comprising a flexible tube (510) connected between the bending adjustment handle (300) and a rigid tube (410) of the straightener (400).

2. The adjustable bending angiography catheter with intraoperative occlusion function as claimed in claim 1, characterized in that: The strain relief sleeve (500) further comprises: A strain relief interface is provided between the flexible tube (510) and the bending adjustment handle (300), or between the flexible tube (510) and the straightener (400).

3. The adjustable bending angiography catheter with intraoperative occlusion function as claimed in claim 2, characterized in that: The flexible tube (510) comprises three layers, and the hardness of the three layers gradually increases from the inside to the outside.

4. The adjustable bending angiography catheter with intraoperative occlusion function as claimed in claim 1, characterized in that: The straightener (400) further comprises: A clamp is connected between the rigid tube (410) and the flexible tube (510) of the strain relief sleeve (500), and the clamp is made of a flexible material.

5. The adjustable bending angiography catheter with intraoperative occlusion function as claimed in claim 1, characterized in that: The length of the front pipe section (110) is longer than the length of the rear pipe section (120).

6. The adjustable bending angiography catheter with intraoperative occlusion function as claimed in claim 1, characterized in that: The outer surface of the bending adjustment handle (300) is provided with a marking layer, and different marking layers correspond to different bending angles of the front end of the front pipe section (110).

7. The adjustable bending angiography catheter with intraoperative occlusion function as claimed in claim 1, characterized in that: One port at the rear end of the rear tube section (120) is connected to the heparin cap (600), and another port at the rear end of the rear tube section (120) is connected to the connector (200).

8. The adjustable bending angiography catheter with intraoperative occlusion function as claimed in claim 1, characterized in that: The outer diameter of the bending adjustment handle (300) is respectively greater than the outer diameters of the straightener (400) and the strain relief sleeve (500).

9. The adjustable bending angiography catheter with intraoperative occlusion function as claimed in claim 1, characterized in that: The length of the straightener (400) is respectively greater than the length of the bending adjustment handle (300) and the length of the strain relief sleeve (500).

10. The adjustable bending angiography catheter with intraoperative occlusion function according to any one of claims 1 to 9, characterized in that: The outer surface of the front tube section (110) is provided with a hydrophilic coating.

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