Anti-dropping bile duct stent

Abstract

The utility model relates to the field of anti-disengagement bile duct supports, and discloses an anti-disengagement bile duct support which comprises two lower protection blocks, connecting blocks are fixedly arranged on the upper end faces of the two lower protection blocks, and upper protection blocks are fixedly arranged on the upper end faces of the two connecting blocks. And connecting columns are fixedly arranged at the connecting positions of every two lower protection blocks and the upper protection blocks, the upper end faces and the lower end faces of the two connecting columns penetrate through the upper end faces and the lower end faces of the lower protection blocks and the upper protection blocks, and fixing grooves are formed in the positions, close to the upper end faces, of the interiors of the two connecting columns. When the device is used, the two ends of the movable column can be fixedly connected with the connecting column through the telescopic rod through the matched use of the connecting column, the limiting hole, the movable column and the strong spring, the device can be conveniently detached for use according to the site condition in the use process, and the situation that the operation progress is delayed due to the improper length of the device is prevented; therefore, the success rate of surgery is influenced.

Description

Technical Field

[0001] The utility model relates to the field of anti-slip bile duct stents, in particular to an anti-slip bile duct stent. Background Art

[0002] A bile duct stent is a medical device used to treat bile duct diseases. It can help maintain the patency of the bile duct and prevent bile duct stenosis or occlusion, thereby improving bile flow and alleviating symptoms associated with bile duct obstruction. After certain bile duct surgeries, a bile duct stent can be used to help drain fluid from the surgical area and promote postoperative recovery. With the widespread use of bile duct stents, the treatment effect of bile duct diseases and the quality of life of patients have been greatly improved.

[0003] The anti-slip bile duct stents currently on the market can only be cut and truncated according to the inspection conditions before the operation. This will cause the bile duct stent to be of a different length from that required for the operation, affecting the normal operation. Therefore, the utility model provides an anti-slip bile duct stent to solve the problems raised in the above-mentioned background technology. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an anti-dislocation bile duct stent. The device can split the bile duct stent according to the patient's condition during surgery and can also promote tissue healing and biological absorption of the stent.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-slip bile duct stent, comprising two lower protective blocks, the upper end surfaces of the two lower protective blocks are fixedly provided with connecting blocks, the upper end surfaces of the two connecting blocks are fixedly provided with upper protective blocks, the two lower protective blocks and the upper protective blocks are fixedly provided with connecting columns at the connection points, the upper and lower end surfaces of the two connecting columns penetrate the upper and lower end surfaces of the lower and upper protective blocks, the interiors of the two connecting columns are provided with fixing grooves close to the upper end surfaces, the inner walls on both sides of the two fixing grooves penetrate the connecting columns and are provided with limiting holes, and the lower end surfaces of the two connecting columns are fixedly provided with anti-slip blocks;

[0006] Through the above technical solution, connecting blocks are installed on the two lower protective blocks, and the two lower protective blocks are connected to the upper protective block through the connecting blocks, which can prevent the lower protective blocks and the upper protective blocks from being misaligned. There is a limiting hole in the fixing groove inside the connecting column, which can limit and fix the telescopic rod.

[0007] Furthermore, movable columns are movably arranged inside the two fixed grooves, and a first placement groove and a second placement groove are provided on the lower end surface and the upper end surface of the two movable columns;

[0008] Through the above technical solution, the movable column is divided into a No. 1 placement slot and a No. 2 placement slot. The No. 1 placement slot can be connected to the lower connecting column, and the No. 2 placement slot can be connected to the upper connecting column.

[0009] Furthermore, the two No. 1 placement slots and the No. 2 placement slots are both fixedly provided with fixed blocks, the four fixed blocks are both fixedly provided with telescopic rods on opposite sides, the front rod bodies of the eight telescopic rods pass through the limiting holes, and the rod bodies of the eight telescopic rods are all sleeved with strong springs;

[0010] Through the above technical scheme, a telescopic rod is installed on the fixed blocks in the No. 1 placement slot and the No. 2 placement slot, and a strong spring is arranged on the rear rod body of the telescopic rod. The telescopic rod can be contracted by pressing the telescopic rod, and the telescopic rod can be rebounded by loosening the telescopic rod according to the elasticity of the strong spring.

[0011] Further, the two lower protection blocks and the upper protection block include inner layers, and the manufacturing material of the two inner layers is nickel-titanium alloy;

[0012] Through the above technical solution, there is an inner layer in the lower protective block and the upper protective block, and the inner layer is made of nickel-titanium alloy, which can provide the basic structure and stability of the bracket.

[0013] Furthermore, a filling layer is fixedly disposed on the lower end surfaces of the two inner layers, and the manufacturing material of the two filling layers is polyvinyl pyrrolidone;

[0014] Through the above technical solution, there are filling layers in the lower protection block and the upper protection block, and the filling layers are made of polyvinyl pyrrolidone, which has softness and biocompatibility.

[0015] Furthermore, the lower end surfaces of the two filling layers are fixedly provided with external coatings, and the manufacturing material of the two external coatings is polytetrafluoroethylene;

[0016] Through the above technical solution, there is an external coating inside the lower protective block and the upper protective block, and the external coating is made of polytetrafluoroethylene, which has a low friction coefficient and good biocompatibility.

[0017] Further, the lower end surfaces of the two outer coatings are fixedly provided with outer biofilm layers, and the manufacturing material of the two outer biofilm layers is polycaprolactone;

[0018] Through the above technical solution, there is an external biofilm layer in the lower protection block and the upper protection block, and the external biofilm layer is made of polycaprolactone, which has good biocompatibility and degradation performance.

[0019] The utility model has the following beneficial effects:

[0020] 1. The utility model proposes an anti-dislocation bile duct stent. When using the device, through the combination of a connecting column, a limiting hole, a movable column and a strong spring, the two ends of the movable column can be connected and fixed to the connecting column through a telescopic rod, so that the device can be disassembled and used according to the situation on site during use, so as to prevent the operation progress from being delayed due to inappropriate device length, thereby affecting the success rate of the operation.

[0021] 2. The utility model proposes an anti-dislocation bile duct stent. When using the device, through the combination of the inner layer, the filling layer, the outer coating and the outer biofilm layer, the device can have a low friction coefficient and good biocompatibility while promoting tissue healing and biological absorption of the stent, thereby improving the permeability and long-term effect of the stent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the lower protection block of the utility model from the axial side;

[0023] Figure 2 This is a schematic diagram of the axial side of the upper protection block of the utility model;

[0024] Figure 3 It is a front cross-sectional schematic diagram of the anti-falling block of the utility model;

[0025] Figure 4 It is a front cross-sectional schematic diagram of the movable column of the utility model;

[0026] Figure 5 It is a schematic cross-sectional view of the external biofilm layer of the utility model.

[0027] Legend:

[0028] 1. Lower protective block; 2. Upper protective block; 3. Connecting block; 4. Connecting column; 5. Limiting hole; 6. Fixed slot; 7. Anti-slip block; 8. Moving column; 9. Placement slot No. 1; 10. Placement slot No. 2; 11. Fixed block; 12. Telescopic rod; 13. Strong spring; 14. Inner layer; 15. Filling layer; 16. External coating; 17. External biofilm layer. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments 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 in 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.

[0030] Example

[0031] Reference Figure 1-5 The utility model provides an embodiment: an anti-slip bile duct stent, comprising two lower protective blocks 1, the upper end surfaces of the two lower protective blocks 1 are fixedly provided with connecting blocks 3, and the upper end surfaces of the two connecting blocks 3 are fixedly provided with upper protective blocks 2;

[0032] A connecting block 3 is installed on the two lower protective blocks 1. The two lower protective blocks 1 are connected to the upper protective block 2 through the connecting block 3, which can prevent the lower protective block 1 and the upper protective block 2 from being misaligned, thereby increasing the safety of the bile duct stent when in use.

[0033] The two lower protective blocks 1 and the upper protective blocks 2 are both fixedly provided with connecting columns 4 at their connection points, the upper and lower end surfaces of the two connecting columns 4 penetrate the upper and lower end surfaces of the lower protective block 1 and the upper protective block 2, the inner parts of the two connecting columns 4 are provided with fixing grooves 6 near the upper end surfaces, the inner walls on both sides of the two fixing grooves 6 penetrate the connecting columns 4 and are provided with limiting holes 5, and the lower end surfaces of the two connecting columns 4 are fixedly provided with anti-slip blocks 7;

[0034] The fixing groove 6 inside the connecting column 4 is provided with a limiting hole 5, which can limit and fix the telescopic rod 12 to prevent the telescopic rod 12 from falling off when the bile duct stent is used, thereby effectively increasing the safety when using the bile duct stent.

[0035] The two fixed grooves 6 are both movably provided with movable columns 8, and the lower end surface and the upper end surface of the two movable columns 8 are both provided with a first placement groove 9 and a second placement groove 10;

[0036] The movable column 8 is divided into a No. 1 placement slot 9 and a No. 2 placement slot 10. The No. 1 placement slot 9 can be connected to the lower connecting column 4, and the No. 2 placement slot 10 can be connected to the upper connecting column 4, so that multiple parts of the bile duct stent can be connected.

[0037] A fixing block 11 is fixedly arranged inside the two No. 1 placement slots 9 and the No. 2 placement slot 10, and telescopic rods 12 are fixedly arranged on opposite sides of the four fixing blocks 11, and the front rods of the eight telescopic rods 12 pass through the limiting hole 5, and the rods of the eight telescopic rods 12 are sleeved with strong springs 13;

[0038] A telescopic rod 12 is installed on the fixing block 11 in the No. 1 placement slot 9 and the No. 2 placement slot 10, and a strong spring 13 is arranged on the rear rod of the telescopic rod 12. The telescopic rod 12 can be contracted by pressing the telescopic rod 12, and the telescopic rod 12 can be rebounded by loosening the telescopic rod 12 according to the elasticity of the strong spring 13, so that the bile duct stent can be disassembled according to the conditions on site during surgery by pressing the telescopic rod 12.

[0039] The two lower protection blocks 1 and the upper protection block 2 include an inner layer 14, the manufacturing material of the two inner layers 14 is nickel-titanium alloy, the lower end surfaces of the two inner layers 14 are fixedly provided with a filling layer 15, the manufacturing material of the two filling layers 15 is polyvinyl pyrrolidone, the lower end surfaces of the two filling layers 15 are fixedly provided with an outer coating 16, the manufacturing material of the two outer coatings 16 is polytetrafluoroethylene, the lower end surfaces of the two outer coatings 16 are fixedly provided with an outer biofilm layer 17, and the manufacturing material of the two outer biofilm layers 17 is polycaprolactone;

[0040] There is an inner layer 14 in the lower protective block 1 and the upper protective block 2, and the inner layer 14 is made of nickel-titanium alloy. The nickel-titanium alloy can provide the basic structure and stability of the stent to ensure that the stent can maintain the correct shape and position in the bile duct. There is a filling layer 15 in the lower protective block 1 and the upper protective block 2, and the filling layer 15 is made of polyvinyl pyrrolidone. Polyvinyl pyrrolidone has softness and biocompatibility to ensure that the stent is well combined with the bile duct wall. There is an outer coating 16 in the lower protective block 1 and the upper protective block 2, and the outer coating 16 is made of polytetrafluoroethylene. Polytetrafluoroethylene has a low friction coefficient and good biocompatibility to improve the passability and long-term effect of the stent. There is an outer biofilm layer 17 in the lower protective block 1 and the upper protective block 2, and the outer biofilm layer 17 is made of polycaprolactone. Polycaprolactone has good biocompatibility and degradation properties. It can be used for the outer biofilm layer 17 to promote tissue healing and bioabsorption of the stent.

[0041] Working principle: When using this device, first install the moving column 8 into the connecting column 4, and then connect the two groups of lower protective blocks 1 and upper protective blocks 2 through the telescopic rod 12 in the No. 1 placement slot 9 and the No. 2 placement slot 10 inside the moving column 8 and the limiting hole 5 in the connecting column 4, so that the two groups of lower protective blocks 1 and upper protective blocks 2 can be connected, and the moving column 8 is made of rubber, and the two groups of lower protective blocks 1 and upper protective blocks 2 can be bent according to usage requirements to provide a usable range for the device. There is a strong spring 13 on the rear rod body of the telescopic rod 12, and the telescopic rod 12 can be contracted by pressing the telescopic rod 12. When the telescopic rod 12 is loosened, the telescopic rod 12 can be rebounded according to the elasticity of the strong spring 13, which is convenient for splitting the bile duct stent according to the conditions on site during surgery by pressing the telescopic rod 12.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bile duct stent for preventing dislodgment, comprising two lower protection blocks (1), characterized in that: The upper end surfaces of the two lower protection blocks (1) are both fixedly provided with a connection block (3), and the upper end surfaces of the two connection blocks (3) are both fixedly provided with an upper protection block (2); The two lower protective blocks (1) and the upper protective blocks (2) are both fixedly provided with connecting columns (4) at their respective connections; the upper end faces and lower end faces of the two connecting columns (4) penetrate the upper end faces and lower end faces of the lower protective block (1) and the upper protective block (2); the interiors of the two connecting columns (4) are both provided with fixing grooves (6) near the upper end faces; the inner walls of the two fixing grooves (6) on both sides thereof penetrate the connecting columns (4) and are both provided with limiting holes (5); and the lower end faces of the two connecting columns (4) are fixedly provided with anti-slip blocks (7); A movable column (8) is movably arranged inside the two fixed grooves (6), and a first placement groove (9) and a second placement groove (10) are provided on the lower end surface and the upper end surface of the two movable columns (8); A fixing block (11) is fixedly arranged inside the two first placement slots (9) and the second placement slot (10), telescopic rods (12) are fixedly arranged on opposite sides of the four fixing blocks (11), the front rod bodies of the eight telescopic rods (12) pass through the limiting holes (5), and the rod bodies of the eight telescopic rods (12) are sleeved with strong springs (13).

2. The anti-dislocation bile duct stent according to claim 1, characterized in that: The two lower protection blocks (1) and the upper protection block (2) comprise an inner layer (14), and the manufacturing material of the two inner layers (14) is nickel-titanium alloy.

3. The anti-dislocation bile duct stent according to claim 2, characterized in that: A filling layer (15) is fixedly arranged on the lower end surfaces of the two inner layers (14), and the manufacturing material of the two filling layers (15) is polyvinyl pyrrolidone.

4. The anti-dislocation bile duct stent according to claim 3, characterized in that: The lower end surfaces of the two filling layers (15) are fixedly provided with external coatings (16), and the manufacturing material of the two external coatings (16) is polytetrafluoroethylene.

5. The anti-dislocation bile duct stent according to claim 4, characterized in that: The lower end surfaces of the two external coatings (16) are fixedly provided with external biofilm layers (17), and the manufacturing material of the two external biofilm layers (17) is polycaprolactone.

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