Covered stent auxiliary device

Abstract

The utility model relates to a covered stent auxiliary device, the device comprises a covering rod, a shell and a cutting module, the covering rod can move upwards relative to the shell by rotating the extended end of the covering rod, the moving distance of the covering rod is consistent in each rotation, and after the covering rod moves, one end of the covering rod, which is provided with a stent membrane, is fixed with the cutting module. When the coronary artery covered stent is cut to a proper degree, an operator holds the device with one hand and holds the coronary artery covered stent with the other hand, and the coronary artery covered stent can be cut through the cutting module arranged on the upper portion of the shell after the coronary artery covered stent is cut to a proper degree. The position, where the stent membrane needs to be wound, of the coronary covered stent is in contact with the stent membrane cut by the covered rod, and then the stent membrane can be rotationally pasted on the coronary covered stent, so that the one-time success rate is increased, the membrane is tightly attached to the stent, and the membrane is prevented from falling off in the blood vessel conveying process; the extension length can be accurately controlled, and cutting is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical auxiliary instruments, in particular to a covered stent auxiliary device. Background Art

[0002] The incidence of cardiovascular diseases has been increasing year by year, and percutaneous coronary intervention has become an important treatment method for cardiovascular diseases. The covered stent is the main treatment means for coronary perforation, especially for patients with coronary perforation who have unsatisfactory hemostatic effects with low-pressure balloon dilation. The covered stent in the coronary field is not only a treatment means with special structures and functions, but also a supplement to traditional treatment means (such as drugs, embolization, and surgery). Currently, there are mainly two types of covered stents commonly used for coronary perforation: the coronary covered stent made of materials such as polytetrafluoroethylene (PTFE) temporarily made in the catheterization laboratory and the PTFE covered stent with a "sandwich" structure. The clinical manifestations of the current covered stents are not satisfactory, and the main reasons are considered as follows: For the "sandwich" structure stent, the cost of this stent is too high, causing an excessive economic burden on patients. In each hospital catheterization laboratory, due to the rarity of coronary artery perforation and cost considerations, the types of covered stents are not fully prepared. Therefore, the currently commonly used covered stents are mostly self-made, and a closed stent is formed by wrapping the stent with a stent membrane such as a sterile dressing and polytetrafluoroethylene. Generally, the stent membrane is directly wound around the coronary covered stent manually, but such a method is related to the operating experience of the operator. In actual use, there are problems such as a low one-time success rate, insufficient tightness of the membrane and the stent, which makes the membrane prone to falling off during blood vessel transportation, and inaccurate length cutting. Content of the Utility Model

[0003] The purpose of the utility model is to provide an auxiliary device for a covered stent.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows.

[0005] A covered stent auxiliary device, the device includes a covered rod, a housing, and a cutting module. A rotating block is fixedly arranged on the covered rod. An upper end extension opening is provided above the housing, and a lower end through hole is provided below the housing. The covered rod is arranged in the housing through the rotating block. The rotating block on the covered rod is threadedly connected with the housing. A stent membrane is provided at one end of the covered rod above the rotating block, and the other end of the covered rod extends out through the lower end through hole of the housing. A cutting module is further provided above the housing.

[0006] With the above structure, by rotating one end of the film covering rod that extends out, when the film covering rod is rotated, it can drive the rotating block to rotate. The rotating rotating block is connected to the outer shell in a threaded manner. Therefore, the film covering rod will move upward relative to the outer shell, and each time it rotates, the distance that the film covering rod moves is the same. After the film covering rod moves, the end of the film covering rod where the support film is provided extends out from the upper end outlet of the outer shell. After extending to an appropriate degree, the film can be cut by the cutting module provided above the outer shell. After cutting to an appropriate degree, the operator holds this device with one hand and holds the coronary artery covered stent with the other hand. The position of the coronary artery covered stent that needs to wind the support film is in contact with the support film cut by the film covering rod, and one end of the support film is pasted on the coronary artery covered stent, and then the coronary artery covered stent is rotated to paste the support film. During the pasting process, the rotating directions of the coronary artery covered stent and this device are kept opposite, so that the support film remains straight, so that the support film can be kept tight when it adheres to the coronary artery covered stent and no air enters, thereby improving the one-time success rate, making the film adhere tightly to the stent, avoiding the film from falling off during the blood vessel transportation process. The design of the threaded rotation and extension enables the extension length to be accurately controlled, which is convenient for cutting.

[0007] Preferably, the cutting module includes a ring, a bearing, a pressing block, a spring and a cutting knife. The ring is arranged above the outer shell through the bearing. The pressing block is provided on the ring. One end of the pressing block is provided with the cutting knife. The cutting knife faces the upper end outlet of the outer shell. A spring is provided between the ring and the pressing block.

[0008] Thus, by pressing the pressing block, the pressing block overcomes the force of the spring and drives the cutting knife to approach the upper end outlet, that is, to approach the support film. Furthermore, when pressing, the ring is driven to rotate, so that the cutting knife rotates for cutting, thereby realizing the rapid cutting of the support film. After cutting is completed, the pressing block is released, and the cutting knife resets under the action of the spring, which is convenient for the subsequent winding operation of the coronary artery covered stent.

[0009] Preferably, two groups of pressing blocks, springs and cutting knives are provided on the ring, and the cutting knives are in a symmetrical structure.

[0010] Thus, by providing two groups of pressing blocks, the corresponding cutting knives increase, and the cutting length of the support film to be cut by each group of cutting knives becomes shorter, that is, the angle to be rotated becomes smaller, making the cutting more convenient and effectively improving the service life of the cutting knife.

[0011] Preferably, a scale is provided at the end of the film covering rod where the support film is provided.

[0012] Thus, by providing the scale, it is convenient for the operator to view the cutting length.

[0013] Preferably, a non-sticking end is provided at the beginning of the support film.

[0014] It can be seen that through the non-sticky end, it is convenient for the operator to paste one end of the stent membrane on the coronary artery covered stent, effectively improving the covering efficiency and success rate.

[0015] Preferably, a layer of silica gel layer is provided on the surface of the outer shell.

[0016] It can be seen that by providing the silica gel layer, the anti-slip ability of the outer shell is increased, and the success rate of the winding operation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a cross-sectional view of the internal structure of the present utility model;

[0019] Figure 3 is Figure 2 an enlarged view of part A of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be described in detail below with reference to the accompanying drawings.

[0021] As Figures 1-3 shown, a covered stent assisting device, the device includes a covering rod 1, an outer shell 2 and a cutting module 3. A rotating block 7 is fixedly provided on the covering rod 1. An upper end extending opening 4 is provided above the outer shell 2. A lower end through hole 5 is provided below the outer shell 2. The covering rod 1 is arranged in the outer shell 2 through the rotating block 7. The rotating block 7 on the covering rod 1 is threadedly connected with the outer shell 2. A stent membrane 6 is provided at one end of the covering rod 1 above the rotating block 7. The other end of the covering rod 1 extends out through the lower end through hole 5 of the outer shell 2. A cutting module 3 is further provided above the outer shell 2.

[0022] Preferably, the cutting module 3 includes an annular member 301, a bearing 302, a pressing block 303, a spring 304 and a cutting knife 305. The annular member 301 is arranged above the outer shell 2 through the bearing 302. The annular member 301 is provided with the pressing block 303. One end of the pressing block 303 is provided with the cutting knife 305. The cutting knife 305 faces the upper end extending opening 4 of the outer shell 2. A spring 304 is provided between the annular member 301 and the pressing block 303.

[0023] Preferably, two groups of pressing blocks 303, springs 304 and cutting knives 305 are provided on the annular member 301, and the cutting knives 305 are in a symmetric structure.

[0024] Preferably, a scale is provided at one end of the covering rod 1 where the stent membrane 6 is provided.

[0025] Preferably, the starting end of the stent membrane 6 is provided with a non-sticky end.

[0026] Preferably, a layer of silica gel layer is provided on the surface of the outer shell 2.

[0027] Specific implementation manner: By rotating one end of the extended film covering rod 1, when the film covering rod 1 rotates, it can drive the rotating block 7 to rotate. The rotating rotating block 7 is connected to the outer shell 2 in a threaded manner. Therefore, the film covering rod 1 will move upward relative to the outer shell 2, and each time it rotates, the moving distance of the film covering rod 1 is the same. After the film covering rod 1 moves, the end of the film covering rod 1 provided with the support film 6 extends out from the upper end outlet 4 of the outer shell 2. By providing a scale, the operator can check the cutting length. After reaching the appropriate degree, in this embodiment, the scale is in millimeters. Further, a cutting module 3 is provided above the outer shell 2 to cut the film. That is, by pressing the pressing block 303, the pressing block overcomes the force of the spring 304 and drives the cutting knife 305 to approach the upper end outlet 4, that is, to approach the support film 6. Further, when pressing, the driving ring 301 rotates, so that the cutting knife 305 rotates and cuts, thereby realizing the rapid cutting of the support film 6. After the cutting is completed, the pressing block 303 is released, and under the action of the spring 304, the cutting knife 305 resets, which is convenient for subsequent winding operations of the coronary artery covered stent. After cutting to the appropriate degree, the operator holds the device with one hand and holds the coronary artery covered stent with the other hand. The position of the coronary artery covered stent that needs to wind the support film 6 is in contact with the support film 6 cut by the film covering rod 1, and one end of the support film 6 is pasted on the coronary artery covered stent. Then, the coronary artery covered stent is rotated to paste the support film 6. During the pasting process, the rotating directions of the coronary artery covered stent and the device are opposite to each other, so that the support film 6 is kept straight, and the support film 6 can be kept tight when it is attached to the coronary artery covered stent, and no air enters, thereby improving the one-time success rate, making the film fit tightly with the stent, and avoiding the film falling off during the blood vessel transportation process. The design of the threaded rotation and extension enables the extension length to be accurately controlled, which is convenient for cutting. The above is a detailed description of the present invention in combination with specific embodiments. It cannot be determined that the specific implementation manner of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several equivalent substitutions or obvious modifications are made, and the performance or use is the same, and all should be regarded as belonging to the patent protection scope determined by the claims submitted by the present invention.

Claims

1. A stent graft assist device, characterized in that: The device comprises a coating rod, a housing and a cutting module; A rotating block is fixed on the coating rod; An upper end extension opening is provided above the shell, and a lower end through hole is provided below the shell; The coating rod is arranged in the housing through a rotary block, and the rotary block on the coating rod is connected to the housing through a thread; The coating rod is provided with a support film at one end above the rotating block, and the other end of the coating rod extends out through the through hole at the lower end of the shell; A cutting module is also arranged above the shell.

2. A stent graft auxiliary device according to claim 1, characterized in that: The cutting module comprises a ring, a bearing, a pressing block, a spring and a cutting knife; The ring is arranged above the housing through a bearing; A pressing block is provided on the ring, and a cutting knife is provided at one end of the pressing block; The cutting knife extends outward toward the upper end of the shell; A spring is arranged between the ring and the pressing block.

3. A stent graft auxiliary device according to claim 2, characterized in that: The ring is provided with two groups of pressing blocks, springs and cutting knives, and the cutting knives present a symmetrical structure.

4. The stent graft auxiliary device according to claim 1, characterized in that: A scale is arranged on one end of the film-coated rod provided with the support film.

5. The stent graft auxiliary device according to claim 1, characterized in that: A non-stick paper sheet is provided at the opening end of the support membrane.

6. The stent graft auxiliary device according to claim 4, characterized in that: A silica gel layer is arranged on the surface of the shell.

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