Balloon connecting structure of intravascular stent

Abstract

The utility model discloses a balloon connecting structure of an intravascular stent, and relates to the technical field of intravascular stents. The intravascular stent comprises a catheter and a balloon, the catheter is arranged at the end of the balloon, the intravascular stent is slidably arranged on the outer side of the balloon in a sleeved mode, the balloon comprises two fixing portions and an anti-skid portion, the two fixing portions are symmetrically arranged along the two axial ends of the balloon, the anti-skid portion is arranged between the two fixing portions, and empty grooves are formed in the opposite sides of the two fixing portions. The connecting rod of the intravascular stent is arranged in the empty groove, and the risk that the intravascular stent slides and deviates freely due to irregular resistance of the vascular wall is reduced through the abutting block.

Description

Technical Field

[0001] This utility model relates to the field of vascular stent technology, and in particular to a balloon connection structure for a vascular stent. Background Technology

[0002] In medicine, a stent is a metal or plastic tube inserted into the lumen of an anatomical blood vessel or catheter to keep the passage open, and stent placement is the procedure of placing a stent. There are various types of stents for different purposes, from expandable coronary stents, vascular stents, and biliary stents to simple plastic stents used to allow urine to flow between the kidneys and bladder.

[0003] Currently, there is a type of vascular stent composed of two different materials: metal stents at both ends and a non-metallic stent in the middle. The metal and non-metallic stents are connected by connecting rods. The specific structure is as follows: Figure 4 As shown, the vascular stent includes a metal stent 12 and a non-metal stent 13. The metal stent 12 and the non-metal stent 13 are connected by a connecting rod 14, and adjacent metal stents 13 are connected by a connecting part 15.

[0004] When using a vascular stent, the stent is first placed on the surface of a balloon. A compression technique is used to reduce the volume of both the balloon and the stent. The balloon is then used to slowly push the stent to the lesion site. The balloon then inflates to support the stent, thus supporting the narrowed or blocked blood vessel. While this method is simple and easy, the balloon primarily moves the stent through friction. During the push-out process, relying solely on friction can cause the stent to slip and deviate due to irregular resistance from the vessel wall, making it difficult to accurately place the stent at the intended lesion site and affecting the treatment outcome.

[0005] A cardiovascular stent interventional support mechanism, as described in an existing Chinese patent (authorization announcement number: CN211095021U), prevents the stent from slipping towards the proximal leg during delivery by setting an inflatable balloon protrusion at the front end of the vascular stent. This reduces the possibility of stent detachment during delivery and improves surgical safety. This structure is very effective in preventing detachment of metallic stents. However, when a non-metallic stent is added, the bonding force between the non-metallic stent and the balloon surface is greatly reduced, increasing the risk of detachment. Simply using a balloon protrusion at the front end of the stent is insufficient to effectively increase the bonding force between the stent and the balloon surface. During delivery, the stent may slip, shift, or detach. Therefore, it is necessary to propose a balloon connection structure for the vascular stent to improve the bonding force between the stent and the balloon, prevent detachment, and enhance surgical safety. Utility Model Content

[0006] The purpose of this invention is to address the problem that vascular stents may slide and shift due to irregular resistance of the blood vessel wall. This invention provides a balloon connection structure for vascular stents.

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] A balloon connection structure for a vascular stent includes a catheter and a balloon. The catheter is disposed at the end of the balloon, and the vascular stent is slidably sleeved on the outside of the balloon. The balloon includes a fixing part and an anti-slip part. Two sets of the fixing parts are symmetrically arranged at both ends along the axial direction of the balloon. The anti-slip part is disposed between the two fixing parts. A groove is opened on the opposite side of the two fixing parts, and the connecting rod of the vascular stent is disposed in the groove.

[0009] By adopting the above technical solution, the vascular stent is sleeved on the outside of the balloon, and the inner surface of the vascular stent is attached to the anti-slip part of the balloon. The connecting rod of the vascular stent is placed in the slot. This not only increases the friction between the vascular stent and the balloon, but also, by restricting the position of the vascular stent through the slot, further increases the bonding force between the vascular stent and the balloon, preventing the vascular stent from detaching or shifting position during movement. In this way, the vascular stent can be smoothly moved to the vascular lesion site under the guidance of the balloon.

[0010] Furthermore, a limiting mechanism is provided on the outer side of the fixing part. The limiting mechanism includes abutment seats fixedly connected to the outer side of the fixing part in a ring array. An abutment block is fixedly connected to the side of the abutment seat away from the fixing part. When the abutment block moves, it abuts against the vascular stent. A connecting block is fixedly connected between two adjacent abutment seats.

[0011] By adopting the above technical solution, the stent is placed on the outside of the balloon. At this time, the abutment block will abut against both sides of the vascular stent, which can limit the position of the vascular stent on the outside of the balloon and reduce the risk of the vascular stent sliding and shifting randomly due to the irregular resistance of the blood vessel wall.

[0012] Furthermore, an abutment pad is fixedly connected to the outside of the abutment block, and the shape of the abutment pad is adapted to the shape of the abutment block.

[0013] By adopting the above technical solution, the contact pad is made of silicone, which has a certain degree of flexibility and can closely fit the surface of the vascular stent.

[0014] Furthermore, a diagonal brace is fixedly connected to the outer side of the abutment seat. The diagonal brace is inclined, and its bottom end is fixedly connected to the fixing part.

[0015] By adopting the above technical solutions, the risk of the contact seat tilting or shifting due to uneven force is reduced.

[0016] Furthermore, friction pads are symmetrically and fixedly connected to the inner side of the empty groove, and the friction pads are shaped as annular rings.

[0017] By adopting the above technical solution, the movement of the vascular stent is restricted through the friction of the friction pad.

[0018] Furthermore, the surface of the anti-slip part is provided with a plurality of anti-slip protrusions.

[0019] By adopting the above technical solution, the friction between the anti-slip part and the vascular stent is further improved, thereby further restricting the movement of the vascular stent.

[0020] In summary, this utility model has at least one of the following beneficial effects;

[0021] 1. In this utility model, when installing a vascular stent, the stent is first placed on the outside of the balloon. At this time, the abutment block will abut against both sides of the vascular stent, which can limit the position of the vascular stent on the outside of the balloon, reduce the risk of the vascular stent sliding and shifting randomly due to the irregular resistance of the blood vessel wall, ensure that the vascular stent can be delivered to the lesion site according to the predetermined path, and improve the placement accuracy.

[0022] 2. In this utility model, when installing a vascular stent, the vascular stent is installed in a suitable position through the sliding connection between the slot and the vascular stent. The slot also restricts the movement of the vascular stent by constraining it, thereby further improving the stability of the vascular stent. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first three-dimensional structure of the balloon in this utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the limiting mechanism in this utility model;

[0025] Figure 3 This is a utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0026] Figure 4 This is a schematic diagram of a vascular stent structure in the background art of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Catheter; 2. Fixation part; 3. Balloon; 4. Anti-slip part; 5. Abutment seat; 6. Abutment block; 7. Connecting block; 8. Abutment pad; 9. Diagonal brace; 10. Hollow groove; 11. Friction pad; 12. Metal support; 13. Non-metallic support; 14. Connecting rod; 15. Connecting part. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below.

[0030] This utility model discloses a balloon connection structure for a vascular stent.

[0031] Reference Figure 1 and Figure 2 A balloon connection structure for a vascular stent includes a catheter 1 and a balloon 3. The catheter 1 is disposed at the end of the balloon 3. The vascular stent is slidably sleeved on the outside of the balloon 3. The balloon 3 includes a fixing part 2 and an anti-slip part 4. Two sets of fixing parts 2 are symmetrically arranged at both ends along the axial direction of the balloon 3. The anti-slip part 4 is disposed between the two fixing parts 2. A groove 10 is opened on the opposite side of the two fixing parts 2. The connecting rod 14 of the vascular stent is disposed in the groove 10.

[0032] When placing a vascular stent, the stent is first placed on the outside of the balloon 3, with the inner surface of the stent conforming to the anti-slip part of the balloon. The connecting rod 14 of the stent is placed in the slot 10. This not only increases the friction between the stent and the balloon, but also, by restricting the position of the stent through the slot 10, further increases the bonding force between the stent and the balloon 3, preventing the stent from detaching or shifting position during movement.

[0033] Reference Figures 1 to 3 A limiting mechanism is provided on the outside of the fixing part 2. The limiting mechanism includes abutment seats 5 fixedly connected to the outside of the fixing part 2 in a ring array. Abutment block 6 is fixedly connected to the side of the abutment seat 5 away from the fixing part 2. When the abutment block 6 moves, it abuts against the vascular stent. A connecting block 7 is fixedly connected between two adjacent abutment seats 5.

[0034] The outer side of the contact block 6 is fixedly connected with a contact pad 8, and the shape of the contact pad 8 is adapted to the contact block 6.

[0035] In addition, a diagonal brace 9 is fixedly connected to the outer side of the contact seat 5. The diagonal brace 9 is set in an inclined shape, and the bottom end of the diagonal brace 9 is fixedly connected to the fixing part 2.

[0036] When installing a vascular stent, the stent is first placed on the outside of the balloon 3. At this time, the abutment block 6 will abut against both sides of the vascular stent, which can limit the position of the vascular stent on the outside of the balloon 3, reduce the risk of the vascular stent sliding and shifting randomly due to the irregular resistance of the blood vessel wall, ensure that the vascular stent can be delivered to the lesion site according to the predetermined path, and improve the placement accuracy.

[0037] When the contact block 6 contacts the vascular stent, the contact pad 8 is made of silicone, which has a certain degree of flexibility and can closely fit the surface of the vascular stent.

[0038] When the vascular stent is pressed against, the inclined brace 9 can transmit part of the force to the fixing part 2, reducing the risk of the contact seat 5 tilting or shifting due to uneven force, and ensuring that the contact block 6 presses against the vascular stent stably.

[0039] Reference Figure 1 and Figure 2 Friction pads 11 are symmetrically and fixedly connected to the inner side of the slot 10. The friction pads 11 are circular in shape.

[0040] The surface of the anti-slip part 4 is provided with several anti-slip protrusions.

[0041] When the vascular stent comes into contact with the friction pad 11, the friction pad 11 is made of polyurethane, which has a certain degree of elasticity and can adapt to the movement of the stent through elastic deformation, providing continuous and stable support and friction effect for the stent.

[0042] The anti-slip protrusions increase the friction between the anti-slip part 4 and the vascular stent, thereby further restricting the movement of the vascular stent.

[0043] Working principle: The vascular stent is placed on the outside of balloon 3. Then, the guidewire is pushed along the blood vessel to the vicinity of the lesion. Subsequently, the vascular stent and balloon 3 are slowly pushed along the guidewire to the vascular lesion. After confirming that the position is correct, an appropriate amount of physiological saline is injected into balloon 3. The pressure generated by the expansion of balloon 3 will expand the vascular stent, making it fit tightly against the blood vessel wall, thereby supporting the narrowed or blocked blood vessel. After the stent is released, the liquid in balloon 3 is slowly withdrawn, causing balloon 3 to retract. Then, balloon 3 and catheter 1 are withdrawn from the body along the guidewire. The stent is placed on the outside of balloon 3. At this time, the connecting rod 14 of the vascular stent is exactly placed in the slot 10. The inner surface of the vascular stent is in contact with the outer surface of balloon 3 and the anti-slip part 4. The contact block 6 abuts against the surface of the vascular stent. All of these can increase the bonding force between the vascular stent and balloon 3. At the same time, several contact blocks 6 can be embedded in the mesh gaps of the vascular stent to restrict the position of the vascular stent and reduce the risk of the vascular stent sliding and shifting randomly due to the irregular resistance of the blood vessel wall.

Claims

1. A balloon connection structure for a vascular stent, comprising a catheter (1) and a balloon (3), wherein the catheter (1) is disposed at the end of the balloon (3), and the vascular stent is slidably sleeved on the outside of the balloon (3), characterized in that: The balloon (3) includes a fixing part (2) and an anti-slip part (4). The two sets of fixing parts (2) are symmetrically arranged at both ends along the axial direction of the balloon (3). The anti-slip part (4) is arranged between the two fixing parts (2). A slot (10) is opened on the opposite side of the two fixing parts (2). The connecting rod (14) of the vascular stent is arranged in the slot (10).

2. The balloon connection structure of a vascular stent according to claim 1, wherein: A limiting mechanism is provided on the outside of the fixing part (2). The limiting mechanism includes abutment seats (5) fixedly connected to the outside of the fixing part (2) in a ring array. Abutment block (6) is fixedly connected to the side of the abutment seat (5) away from the fixing part (2). When the abutment block (6) moves, it abuts against the vascular stent. A connecting block (7) is fixedly connected between two adjacent abutment seats (5).

3. The balloon connection structure of a vascular stent according to claim 2, wherein: An abutment pad (8) is fixedly connected to the outside of the abutment block (6), and the shape of the abutment pad (8) is adapted to the shape of the abutment block (6).

4. The balloon connection structure of a vascular stent according to claim 2, wherein: The outer side of the abutment seat (5) is fixedly connected to a diagonal brace (9), which is set in an inclined shape, and the bottom end of the diagonal brace (9) is fixedly connected to the fixing part (2).

5. The balloon connection structure of a vascular stent according to claim 1, characterized in that: The inner side of the slot (10) is symmetrically fixedly connected with a friction pad (11), and the friction pad (11) is shaped as a ring.

6. The balloon connection structure of a vascular stent according to claim 1, characterized in that: The surface of the anti-slip part (4) is provided with a number of anti-slip protrusions.

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