Nickel-titanium alloy support taking-out device

Abstract

The utility model discloses a nickel-titanium alloy stent taking-out device, which belongs to the technical field of medical instruments and comprises a catheter, a protective cover is slidably connected to the outer side of one end of the catheter, and a water outlet pipe, a first water inlet pipe and a second water inlet pipe are arranged in the middle of the catheter. A second connecting hole or a first connecting hole is formed in the other end of the water outlet pipe and the other end of the second water inlet pipe respectively, a cooling pipe is installed at outer ports of the second connecting hole and the first connecting hole, the outer surface of the cooling pipe is slidably connected with a nickel-titanium alloy support, and a first water outlet hole or a second water outlet hole is formed in the other end of the first water inlet pipe; a first blocking ball or a second blocking ball is installed at the outer end opening of the first water outlet hole and the outer end opening of the second water outlet hole correspondingly, through the cut-off design of the protection cover, the protection cover can move in a pipeline more conveniently, the nickel-titanium alloy support can be efficiently cooled through continuous operation of cooling liquid in the cooling pipe, the cooling efficiency is improved, and the service life of the nickel-titanium alloy support is prolonged. And the contraction efficiency of the nickel-titanium alloy stent is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a nickel-titanium alloy stent removal device. Background Technique

[0002] The nickel-titanium alloy stent is a medical device made of nickel-titanium shape memory alloy, mainly used for treating diseases such as esophageal cancer. The nickel-titanium alloy stent, also known as the Nitinol stent, is a special metal alloy composed of two elements, nickel and titanium. This alloy has two remarkable properties: shape memory effect and superelasticity. The shape memory effect means that the nickel-titanium alloy can remember and restore a preset shape at a certain temperature, while superelasticity means that it can return to its original shape even after large deformations. These properties make the nickel-titanium alloy stent widely used in the medical field.

[0003] In the prior art, there is a nickel-titanium alloy stent removal device with the patent publication number of CN217339003U. The above patent has a simple structure and convenient operation, enabling the nickel-titanium alloy stent to be removed percutaneously through minimally invasive surgery. It not only causes less trauma to the patient, enabling the patient to recover faster, but also can be carried out in an outpatient environment, saving medical resources and reducing the economic burden on the patient. However, there are still the following deficiencies in actual use. Starting from the device itself, the device only injects coolant once, and the cooling effect is not good. Moreover, the pipeline is not always straight, so the protection device needs to have a certain flexibility to facilitate movement in the pipeline.

[0004] Therefore, a nickel-titanium alloy stent removal device is needed to solve the problems existing in the prior art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a nickel-titanium alloy stent removal device to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: A nickel-titanium alloy stent removal device includes a catheter. A protective cover is slidably connected to the outer side of one end of the catheter. The middle of the catheter is provided with a water outlet pipe, a first water inlet pipe, and a second water inlet pipe. The other ends of the water outlet pipe and the second water inlet pipe are respectively provided with a second connection hole or a first connection hole. Cooling pipes are installed at the outer ports of the second connection hole and the first connection hole. A nickel-titanium alloy stent is slidably connected to the outer surface of the cooling pipe. The other end of the first water inlet pipe is provided with a first water outlet hole or a second water outlet hole. A first blocking ball or a second blocking ball is respectively installed at the outer ports of the first water outlet hole and the second water outlet hole.

[0007] It should be noted in the solution that the protective cover includes several connecting pipes. The number of the several connecting pipes is four, and several springs are fixedly connected to the opposite sides of the connecting pipes. Grooves are provided in the middle of the several connecting pipes, and a first sliding hole is provided on one side of the frontmost connecting pipe. The first sliding hole is slidably connected to the outer surface of the conduit, and a second sliding hole is provided on one side of the rearmost connecting pipe.

[0008] It is further worth noting that the edges of the frontmost and rearmost connecting pipes are both arc-shaped.

[0009] It is further necessary to note that a first limiting plate is fixedly connected to the outer surface of the conduit in front of the frontmost connecting pipe, and a second limiting plate is fixedly connected to the outer surface of the conduit inside the grooves in the middle of the several connecting pipes. The first limiting plate and the second limiting plate have the same size and specification, and the radii of the first limiting plate and the second limiting plate are both larger than the radius of the first sliding hole and smaller than the radius of the second sliding hole.

[0010] As a preferred implementation manner, the cooling pipe is annular.

[0011] As a preferred implementation manner, the length of the water outlet pipe minus the length of the second water inlet pipe is equal to the length of the cooling pipe.

[0012] As a preferred implementation manner, the first water outlet hole is located on one side of the lower end of the first water inlet pipe, and the second water outlet hole is located at the bottom end of the first water inlet pipe. First blocking balls or second blocking balls are respectively installed at the outer ports of the first water outlet hole and the second water outlet hole.

[0013] Compared with the prior art, a nickel-titanium alloy stent removal device provided by the present utility model has at least the following beneficial effects:

[0014] (1) First, send the nickel-titanium alloy stent removal device into the pipeline through minimally invasive surgery, then slowly move the nickel-titanium alloy stent removal device until the cooling pipe is located inside the nickel-titanium alloy stent. Then use the first air inlet pipe to block the upper and lower ends of the pipeline with the first blocking ball and the second blocking ball, and then use the cooling pipe to make the nickel-titanium alloy stent contract. After the nickel-titanium alloy stent contracts, pull the nickel-titanium alloy stent removal device, and finally slowly take out the nickel-titanium alloy stent. The structure is simple and the operation is convenient, enabling the nickel-titanium alloy stent to be removed percutaneously through minimally invasive surgery, which not only causes less trauma to the patient and enables the patient to recover faster, but also through the segmented design of the protective cover, the movement of the protective cover in the pipeline can be made more convenient.

[0015] (2) By continuously operating the coolant in the cooling pipe, the nickel-titanium alloy stent can be cooled more efficiently, thereby improving the contraction efficiency of the nickel-titanium alloy stent and further improving the practicability of the nickel-titanium alloy stent removal device. Description of the Drawings

[0016] Figure 1 is a front structure schematic diagram of the present utility model;

[0017] Figure 2 is a sectional structure schematic diagram of the protective cover of the present utility model;

[0018] Figure 3 is a front structure schematic diagram of the catheter of the present utility model;

[0019] Figure 4 is a sectional structure schematic diagram of the catheter of the present utility model.

[0020] In the figure: 1. Catheter; 101. First limiting plate; 102. Second limiting plate; 103. Water outlet pipe; 104. First water inlet pipe; 105. Second water inlet pipe; 106. First water outlet hole; 107. First connection hole; 108. Second connection hole; 109. Second water outlet hole; 2. Protective cover; 201. Connecting pipe; 202. Groove; 203. Spring; 204. First sliding hole; 205. Second sliding hole; 3. First blocking ball; 4. Cooling pipe; 5. Nitinol stent; 6. Second blocking ball. Specific embodiments

[0021] The following further describes the present utility model in conjunction with embodiments.

[0022] Please refer to Figures 1-4 , the present utility model provides a nitinol stent removal device, including: a catheter 1, a protective cover 2 is slidably connected to the outer side of one end of the catheter 1, and a water outlet pipe 103, a first water inlet pipe 104 and a second water inlet pipe 105 are arranged in the middle of the catheter 1. Second connection holes 108 or first connection holes 107 are respectively arranged at the other ends of the water outlet pipe 103 and the second water inlet pipe 105. Cooling pipes 4 are installed at the outer ports of the second connection holes 108 and the first connection holes 107. A nitinol stent 5 is slidably connected to the outer surface of the cooling pipe 4, and first water outlet holes 106 or second water outlet holes 109 are arranged at the other end of the first water inlet pipe 104. First blocking balls 3 or second blocking balls 6 are respectively installed at the outer ports of the first water outlet holes 106 and the second water outlet holes 109.

[0023] Further, as Figure 2As shown, it is worth specifically stating that the protective cover 2 includes a number of connecting pipes 201. The number of the connecting pipes 201 is four, and a number of springs 203 are fixedly connected to the opposite sides of the connecting pipes 201. Grooves 202 are provided in the middle of the connecting pipes 201, and a first sliding hole 204 is provided on one side of the frontmost connecting pipe 201. The first sliding hole 204 is slidably connected to the outer surface of the conduit 1. A second sliding hole 205 is provided on one side of the rearmost connecting pipe 201. Through the segmented design of the protective cover 2, the movement of the protective cover 2 in the pipeline can be made more convenient, and the nickel-titanium alloy stent 5 can be received and then pulled out through the grooves 202 to prevent secondary harm to the human body.

[0024] Further, as Figure 2 shown, it is worth specifically stating that the edges of the frontmost and rearmost connecting pipes 201 are both arc-shaped. By making the edges of the frontmost and rearmost connecting pipes 201 arc-shaped, the movement of the protective cover 2 in the pipeline can be made more convenient.

[0025] This solution has the following working process: First, send the nickel-titanium alloy stent removal device into the pipeline through minimally invasive surgery, and then slowly move the nickel-titanium alloy stent removal device until the cooling pipe 4 is located inside the nickel-titanium alloy stent 5. Then, use the first water inlet pipe 104 to block the upper and lower ends of the pipeline with the first blocking ball 3 and the second blocking ball 6. Then, through continuous operation of the coolant in the cooling pipe 4, the nickel-titanium alloy stent 5 is contracted. When the nickel-titanium alloy stent 5 is contracted, pull the nickel-titanium alloy stent removal device, and finally slowly take out the nickel-titanium alloy stent 5.

[0026] According to the above working process, it can be seen that: through the segmented design of the protective cover 2, the movement of the protective cover 2 in the pipeline can be made more convenient, and the nickel-titanium alloy stent 5 can be received and then pulled out through the grooves 202 to prevent secondary harm to the human body. By making the edges of the frontmost and rearmost connecting pipes 201 arc-shaped, the movement of the protective cover 2 in the pipeline can be made more convenient.

[0027] Further, as Figure 2As shown, it is worth specifically noting that a first limiting plate 101 is fixedly connected to the front side of the connection pipe 201 at the very front end of the outer surface of the catheter 1, and a second limiting plate 102 is fixedly connected inside the groove 202 in the middle of several connection pipes 201 on the outer surface of the catheter 1. The first limiting plate 101 and the second limiting plate 102 have the same size and specifications, and the radii of both the first limiting plate 101 and the second limiting plate 102 are greater than the radius of the first sliding hole 204 and less than the radius of the second sliding hole 205. Through the catheter 1, that is, the nitinol stent removal device is sent into the pipeline through minimally invasive surgery, and then the nitinol stent removal device is slowly moved until the cooling pipe 4 is located inside the nitinol stent 5. Then, the first water inlet pipe 104 is used to block the upper and lower ends of the pipeline with the first blocking ball 3 and the second blocking ball 6, and then the cooling pipe 4 is used to shrink the nitinol stent 5. After the nitinol stent 5 shrinks, the nitinol stent removal device is pulled, and finally the nitinol stent 5 can be slowly taken out. The structure is simple and the operation is convenient, enabling the nitinol stent 5 to be removed percutaneously through minimally invasive surgery, which not only causes less trauma to the patient but also enables the patient to recover faster.

[0028] Further, as Figure 1 shown, it is worth specifically noting that the cooling pipe 4 is annular. Through the shape of the cooling pipe 4, the contact area with the nitinol stent 5 can be increased, thereby increasing the contraction rate of the nitinol stent 5.

[0029] Further, as Figure 1 shown, it is worth specifically noting that the length of the water outlet pipe 103 minus the length of the second water inlet pipe 105 is equal to the length of the cooling pipe 4. Through the lengths of the water outlet pipe 103 and the second water inlet pipe 105, the flow of the coolant in the cooling pipe 4 can be facilitated.

[0030] Further, as Figure 3 and Figure 4 shown, it is worth specifically noting that the first water outlet hole 106 is located on one side of the lower end of the first water inlet pipe 104, and the second water outlet hole 109 is located at the bottom end of the first water inlet pipe 104. The outer ports of the first water outlet hole 106 and the second water outlet hole 109 are respectively equipped with the first blocking ball 3 or the second blocking ball 6. Through the first blocking ball 3 or the second blocking ball 6, the upper and lower ends of the nitinol stent 5 can be blocked, facilitating subsequent operations.

[0031] In summary: First, the nickel-titanium alloy stent removal device is sent into the pipeline through minimally invasive surgery, and then the nickel-titanium alloy stent removal device is slowly moved until the cooling pipe 4 is located inside the nickel-titanium alloy stent 5. Then, the first blocking balls 3 and the second blocking balls 6 are used to block the upper and lower ends of the pipeline by the first water inlet pipe 104. Then, by continuously operating the coolant in the cooling pipe 4, the nickel-titanium alloy stent 5 is contracted. When the nickel-titanium alloy stent 5 is contracted, the nickel-titanium alloy stent removal device is pulled, and finally the nickel-titanium alloy stent 5 is slowly removed. Through the catheter 1, that is, the nickel-titanium alloy stent removal device is sent into the pipeline through minimally invasive surgery, and then the nickel-titanium alloy stent removal device is slowly moved until the cooling pipe 4 is located inside the nickel-titanium alloy stent 5. Then, the first blocking balls 3 and the second blocking balls 6 are used to block the upper and lower ends of the pipeline by the first water inlet pipe 104. Then, the cooling pipe 4 is used to contract the nickel-titanium alloy stent 5. When the nickel-titanium alloy stent 5 is contracted, the nickel-titanium alloy stent removal device is pulled, and finally the nickel-titanium alloy stent 5 is slowly removed. The structure is simple and the operation is convenient, so that the nickel-titanium alloy stent 5 can be removed percutaneously through minimally invasive surgery, which not only causes less trauma to the patient and enables the patient to recover faster. Through the shape of the cooling pipe 4, the contact area with the nickel-titanium alloy stent 5 can be increased, thereby increasing the contraction rate of the nickel-titanium alloy stent 5. Through the lengths of the water outlet pipe 103 and the second water inlet pipe 105, the flow of the coolant in the cooling pipe 4 can be facilitated. Through the first blocking ball 3 or the second blocking ball 6, the upper and lower ends of the nickel-titanium alloy stent 5 can be blocked, facilitating subsequent operations.

[0032] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the principles described in the specification are only the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A nickel-titanium alloy stent removal device, comprising a catheter (1), characterized in that: A protective cover (2) is slidably connected to the outer side of one end of the conduit (1), and a water outlet pipe (103), a first water inlet pipe (104) and a second water inlet pipe (105) are provided in the middle of the conduit (1), and the other ends of the water outlet pipe (103) and the second water inlet pipe (105) are respectively provided with a second connecting hole (108) or a first connecting hole (107), and the outer ends of the second connecting hole (108) and the first connecting hole (107) are respectively installed with a cooling pipe (4), and the outer surface of the cooling pipe (4) is slidably connected with a nickel-titanium alloy bracket (5), and the other end of the first water inlet pipe (104) is provided with a first water outlet hole (106) or a second water outlet hole (109), and the outer ends of the first water outlet hole (106) and the second water outlet hole (109) are respectively installed with a first blocking ball (3) or a second blocking ball (6).

2. A nickel-titanium alloy stent removal device according to claim 1, characterized in that: The protective cover (2) comprises a plurality of connecting tubes (201), the number of the plurality of connecting tubes (201) is four, and the opposite sides of the connecting tubes (201) are fixedly connected with a plurality of springs (203), the middle parts of the plurality of connecting tubes (201) are provided with a groove (202), and a first sliding hole (204) is provided on one side of the frontmost connecting tube (201), the first sliding hole (204) is slidably connected to the outer surface of the catheter (1), and a second sliding hole (205) is provided on one side of the rearmost connecting tube (201).

3. A nickel-titanium alloy stent removal device according to claim 2, characterized in that: The edges of the connecting pipe (201) at the front end and the rear end are both in arc shape.

4. A nickel-titanium alloy stent removal device according to claim 1, characterized in that: The outer surface of the conduit (1) is located at the front side of the frontmost connecting tube (201) and is fixedly connected to a first limiting plate (101), and the outer surface of the conduit (1) is located inside the middle grooves (202) of the plurality of connecting tubes (201) and is fixedly connected to a second limiting plate (102), the first limiting plate (101) and the second limiting plate (102) having the same size and specification, and the radii of the first limiting plate (101) and the second limiting plate (102) are both larger than the radius of the first sliding hole (204) and smaller than the radius of the second sliding hole (205).

5. The nickel-titanium alloy stent removal device according to claim 1, characterized in that: The cooling pipe (4) is ring-shaped.

6. The nickel-titanium alloy stent removal device according to claim 1, characterized in that: The length of the water outlet pipe (103) minus the length of the second water inlet pipe (105) is equal to the length of the cooling pipe (4).

7. The nickel-titanium alloy stent removal device according to claim 1, characterized in that: The first water outlet hole (106) is located at one side of the lower end of the first water inlet pipe (104), and the second water outlet hole (109) is located at the bottom end of the first water inlet pipe (104), and the first water outlet hole (106) and the second water outlet hole (109) are respectively installed with a first blocking ball (3) or a second blocking ball (6) at the outer ends thereof.

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