Device for capturing foreign matters in blood vessel
By designing a three-dimensional three-dimensional skeleton structure intravascular foreign body grabber, the problem of single operation angle and insufficient grip in the existing technology is solved, and the rapid and accurate capture of foreign matter in interventional treatment is achieved, and surgical efficiency and safety are improved sex.
Patent Information
- Application Number
- CN202420299471.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-19
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-02-19
Smart Images
Figure CN222487557U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to an intravascular foreign body capture device. Background Art
[0002] At present, the main method of interventional treatment is to implant stents, occluders, coils, filters or artificial valves through catheters in blood vessels. However, during the operation, there may be phenomena such as guidewire detachment, stents, occluders, coils, filters or artificial valves being unloaded. Two-dimensional snare catchers and three-dimensional claw catchers are available on the market, but the two-dimensional snare catchers have a single and inflexible operating angle in blood vessels, and the probability of catching is not high. The claw catchers have relatively weak gripping force, which is prone to repeated detachment of foreign bodies, resulting in prolonged operation time, increased surgical risks, and the risk of long-term exposure to radiation for interventional physicians and patients.
[0003] The three-dimensional skeleton structure intravascular foreign body capturer described in the utility model can hook, grab, pull and bite foreign bodies at multiple angles in the blood vessel, so as to quickly and accurately capture foreign bodies in the blood vessel, greatly shortening the time used to capture foreign bodies such as detached guide wires and stents during interventional treatment, and shortening the exposure time of doctors and patients to X-rays, which not only improves the efficiency and safety of the operation, but also reduces the risk of the operation, thus filling the gap in the prior art. Utility Model Content
[0004] The utility model proposes an intravascular foreign body capturer with a three-dimensional skeleton structure. The capture sleeve of the three-dimensional skeleton structure of the capturer can cover the area passed by the foreign body at multiple angles during interventional treatment surgery, and can quickly, accurately and effectively capture the foreign body, greatly shortening the time for capturing the foreign body during interventional treatment, thereby shortening the surgery and X-ray exposure time, reducing surgical risks and improving surgical efficiency.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a three-dimensional skeleton structure intravascular foreign body capture device, which includes: a catheter, a capture rod, and a capture sleeve.
[0006] The catheter is a through-type tube body, and a tube made of polymer material in the prior art can be used. The inner diameter of the tube body is 1 to 2 times the length of the longest diagonal line in the cross section when the capture sleeve is stacked to the minimum volume, generally 5F to 8F.
[0007] The catheter is provided with a concentric reducing ring near the connection between the capture sleeve and the capture rod, which can reduce the inner diameter of the catheter by 1 / 3 to 1 / 2.
[0008] The capture rod can adopt a delivery guide wire made of a polymer material or a metal material in the prior art, and one end of the guide wire is connected to the capture sleeve.
[0009] The capture sleeve comprises two capture guide wires with symmetrical three-dimensional skeleton structures.
[0010] The capture guide wire of the capture sleeve is a capture wire made of a memory alloy material.
[0011] The capture guide wire of the capture sleeve is a capture wire made of nickel-titanium wire material.
[0012] One end of the two three-dimensional skeleton structure capture guide wires of the capture sleeve is fixedly connected to the capture rod, and an X-ray-proof mark is provided at the connection point.
[0013] The two capture guide wires of the capture sheath are in an occlusal and overlapping state in the catheter.
[0014] The two capture guide wires of the capture sheath are unfolded outside the catheter to form a Y-shaped vine-like cubic or cylindrical skeleton structure, which can hook, pull and bite foreign bodies in blood vessels at multiple angles. The two three-dimensional skeleton structures in the capture sheath are symmetrical vine-like cylinders.
[0015] After one of the capture wires in the capture sheath has hooked the foreign body in the blood vessel, the capture rod is pulled back so that the three-dimensional skeleton structures of the two capture wires gradually kiss each other, and when the capture sheath is put back into the catheter, the three-dimensional skeleton structures of the two capture wires bite and fix the foreign body in the blood vessel. If the capture sheath is not completely bitten, the capture rod can be further pulled back so that the connection between the capture rod and the capture sheath, that is, the capture rod is not transparent to the x-ray mark, passes over the concentric reducer ring of the catheter, so that the three-dimensional skeleton structures of the two capture wires are further overlapped and completely bitten, so as to fix the foreign body in the blood vessel and remove it from the body.
[0016] The beneficial effects of the utility model are as follows: the utility model has a simple structure, is easy to use, and is safe and reliable. Through a simple structure, the problem that foreign bodies are difficult to capture after they fall off and remain in blood vessels during the existing interventional treatment is solved, thus filling the gap in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a schematic diagram of the side structure of a three-dimensional skeleton structure capturer in one embodiment of the utility model.
[0019] Figure 2 It is a schematic diagram of the top view of a three-dimensional skeleton structure capturer in one embodiment of the utility model.
[0020] Figure 3 This is a diagram of the unfolding process of the three-dimensional skeleton structure capture device during capture in one embodiment of the utility model.
[0021] Figure 4 This is a diagram of the overlapping and biting process of the three-dimensional skeleton structure capture device during capture in one embodiment of the utility model.
[0022] Figure 5 This is a schematic diagram of a top view of a three-dimensional skeleton structure capture device in another embodiment of the present invention. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings of the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] like Figure 1 As shown, a three-dimensional skeleton structure intravascular foreign body capturer provided in one embodiment of the utility model includes: a catheter 11, a capture rod 21, and a capture sleeve 31-38.
[0025] The catheter 11 is a through-type tube body, and can be made of polymer materials in the prior art. The inner diameter of the tube body is 1 to 2 times the length of the longest diagonal line in the cross section when the capture sleeve is stacked to the minimum volume, generally 5F to 8F. The catheter 11 has a concentric reducing ring 12 near the connection between the capture sleeve and the capture rod, which can reduce the inner diameter of the catheter by 1 / 3 to 1 / 2.
[0026] The capture rod 21 adopts a delivery guide wire made of polymer material and metal material in the prior art. One end of the guide wire is connected to the capture sleeve. There is an X-ray-proof mark 22 at the connection to indicate the spatial position of the capture sleeve during interventional operation.
[0027] The capture sleeve comprises two capture guide wires 31-39 of symmetrical three-dimensional skeleton structure. The capture guide wires are capture wires made of memory alloy material or nickel-titanium alloy material.
[0028] In order to achieve efficient capture by the capture device, in a preferred embodiment, Figure 1-4 As shown, the three-dimensional skeleton structure of the capture guide wires 31-39 of the capture sleeve is in the shape of a cube.
[0029] In order to achieve efficient capture by the capture device, in another preferred embodiment, as Figure 5 As shown, the three-dimensional skeleton structure of the capture guide wires 31-39 of the capture sleeve is cylindrical.
[0030] Before the arrest, Figure 1 As shown, the two capture guide wires of the capture sheath are in a kissing state inside the catheter.
[0031] During the arrest process, if Figure 3 As shown, the two capture guide wires of the capture sheath are unfolded outside the catheter to form a Y-shaped vine-like cubic or cylindrical skeleton structure, which can hook, pull and bite foreign bodies in blood vessels at multiple angles.
[0032] After one of the capture guide wires of the capture sheath hooks the foreign body in the blood vessel, the capture rod 21 is pulled back to make the capture sheath return to the catheter 11, and the three-dimensional skeleton structures of the two capture guide wires gradually kiss each other, bite and fix the foreign body in the blood vessel, and prevent the foreign body from falling off from the capture sheath.
[0033] If the capture sleeve is not fully engaged, the capture rod 21 can be further pulled back to make the connection between the capture rod and the capture sleeve, that is, the capture rod non-transparent X-ray mark 22, pass over the concentric reducer ring 12 of the catheter. Figure 5 As shown, the three-dimensional skeleton structure of the two capture guide wires is further overlapped and fully engaged, so as to fix the foreign body, prevent the foreign body from falling off from the capture sleeve, and remove the foreign body in the blood vessel from the body.
Claims
1. An intravascular foreign body capture device, comprising: The catheter, the capturing rod and the capturing sleeve are characterized in that the catheter is a through-type tube body, a concentric reducing ring is provided near the connection between the catheter and the capturing sleeve and the capturing rod, one end of the capturing rod is connected to the capturing sleeve, and an X-ray-proof mark is provided at the connection, and the capturing sleeve includes two capturing guide wires with a three-dimensional skeleton structure, the capturing guide wires are in an overlapping state in the catheter, and after being unfolded, they form a Y-shaped symmetrical vine-like three-dimensional skeleton structure.
2. The intravascular foreign body capture device according to claim 1, characterized in that: The catheter is a through-type tube body, and can adopt a tube made of polymer materials in the prior art. The inner diameter of the tube body is 1 to 2 times the length of the longest diagonal line in the cross section when the capture sleeve is stacked to the minimum volume, generally 5F to 8F.
3. The intravascular foreign body capture device according to claim 1, characterized in that: The catheter is provided with a concentric reducing ring near the connection between the capturing sleeve and the capturing rod, which can reduce the inner diameter of the catheter by 1 / 3 to 1 / 2.
4. The intravascular foreign body capture device according to claim 1, characterized in that: The capture rod can adopt a conveying guide wire made of a polymer material or a metal material in the prior art, and one end of the guide wire is connected to the capture sleeve.
5. The intravascular foreign body capture device according to claim 1, characterized in that: The capture sleeve comprises two capture guide wires with symmetrical three-dimensional skeleton structures.
6. The intravascular foreign body capture device according to claim 1, characterized in that: One end of the two three-dimensional skeleton structure capture guide wires is fixedly connected to the capture rod, and an X-ray-proof mark is provided at the connection point.
7. The intravascular foreign body capture device according to claim 5, characterized in that: The capture guide wire is a capture wire made of a memory alloy material.
8. The intravascular foreign body capture device according to claim 5, characterized in that: The capture guide wire is a capture wire made of nickel-titanium alloy wire material.
9. The intravascular foreign body capture device according to claim 5, characterized in that: The two three-dimensional skeleton structures in the capture sleeve are symmetrical vine-shaped cubes.
10. The intravascular foreign body capture device according to claim 5, characterized in that: The two three-dimensional skeleton structures in the capture sleeve are symmetrical vine-shaped cylinders.