An external blood vessel fixation stent for arteriovenous fistula

Abstract

The present invention discloses an external blood vessel fixing stent for arteriovenous fistula in the technical field of blood vessel stents, which includes an arterial tube body and a venous tube body. A receiving groove is formed in the arterial tube body, and the venous tube body is rotatably connected in the receiving groove. A piston cavity is formed in the arterial tube body, and a lead screw is threadedly connected in the piston cavity. A piston plate is threadedly connected to the lead screw, and the piston plate is slidably connected in the piston cavity. A push rod is fixedly connected to the piston plate, and one end of the push rod is fixedly connected to a push plate. A support plate is fixedly connected to the piston plate. There is a filling mechanism in the receiving groove, and the filling mechanism is movably connected to the support plate. A partitioning mechanism is installed in the piston cavity, and the push plate is movably connected to the partitioning mechanism. An air cavity is formed on one side of the partitioning mechanism. An adjusting mechanism is provided between the venous tube body and the receiving groove, making the device more convenient to insert and remove, reducing the size of the patient's wound, and avoiding a large wound affecting its recovery efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of vascular stents, and specifically to an external vascular fixation stent for arteriovenous fistulas. Background Art

[0002] The number of chronic patients in China has reached 130 million, among which the number of end-stage chronic kidney disease patients exceeds 10 million. End-stage patients can only prolong their lives through kidney transplantation or kidney replacement (artificial dialysis) at present. However, the number of kidney transplants in China is very limited, and the vast majority of patients are treated by dialysis. The number of existing dialysis patients in China has exceeded 1 million, and more than 100,000 new dialysis patients are added every year. The prerequisite for end-stage patients to undergo hemodialysis is to establish an extracorporeal dialysis access. Only after the establishment of the hemodialysis access can patients undergo hemodialysis through dialysis equipment. At present, more than 90% of the established hemodialysis accesses have selected the surgical method of arteriovenous internal fistula, that is, doctors construct an access in the limbs of patients through surgery, so that dialysis doctors can puncture the access to introduce the patient's blood into the extracorporeal hemodialysis machine for dialysis. For example, a technical solution is disclosed in the patent: CN202210988009.2. However, there are still some problems when this technical solution is used. The venous internal fistula stent is generally Y-shaped, so as to facilitate the fitting of the artery and the vein to form an internal fistula. However, the artery tube body and the vein tube body in this technical solution are in a fixed state. When the device needs to be placed into the body from the incision of the human body, due to the large Y-shaped shape, the wound of the patient will become larger, resulting in difficult recovery of the wound. At the same time, due to the large space occupied by the shape of the device, its placement and removal in the body are both relatively troublesome, thus affecting the practicability and convenience of the device.

[0003] Based on this, the present invention designs an external vascular fixation stent for arteriovenous fistulas to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an external vascular fixation stent for arteriovenous fistulas to solve the problem that the use of the device in the above background art easily causes the wound of the patient to increase, thus affecting the recovery of the wound.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An external blood vessel fixing stent for arteriovenous fistula, comprising an arterial tube body and a venous tube body. A receiving groove is formed on the arterial tube body, and the venous tube body is rotatably connected in the receiving groove. A piston cavity is formed in the arterial tube body, and a lead screw is threadedly connected in the piston cavity. A piston plate is threadedly connected to the lead screw, and the piston plate is slidably connected in the piston cavity. A push rod is fixedly connected to the piston plate, and one end of the push rod is fixedly connected to a push plate. A support plate is fixedly connected to the piston plate. A filling mechanism is arranged in the receiving groove, and the filling mechanism is movably connected to the support plate. A partitioning mechanism is installed in the piston cavity, and the push plate is movably connected to the partitioning mechanism. An air cavity is formed on one side of the partitioning mechanism, and an adjusting mechanism is arranged between the venous tube body and the receiving groove.

[0007] As a further scheme of the present invention, a handle is installed at one end of the lead screw. A groove is formed on one side of the arterial tube body, and the handle is located in the groove. The handle can slide vertically on the lead screw, and an anti-slip layer is arranged on the surface of the handle.

[0008] As a further scheme of the present invention, a collar is sleeved on the piston plate, and the collar and the piston cavity form a seal. A sealing sleeve is arranged between the piston plate and the lead screw.

[0009] As a further scheme of the present invention, the filling mechanism comprises a filling sleeve, a sliding rod, a sealing plate and a sealing groove. A filling sleeve is arranged in the receiving groove. The filling sleeve is a flexible filling layer, and a seal is formed between the filling sleeve and the receiving groove. A sliding rod is fixedly connected to the filling sleeve, and a sealing plate is fixedly connected to one end of the sliding rod.

[0010] As a further scheme of the present invention, a sealing groove is formed on the top surface of the piston cavity, and the sealing plate is movably connected in the sealing groove.

[0011] As a further scheme of the present invention, the partitioning mechanism comprises a partitioning plate, a rotating rod, a rotating plate and a torsion spring. A partitioning plate is fixedly connected in the piston cavity. A rotating rod is rotatably connected in the partitioning plate. A rotating plate is installed on the rotating rod. The push plate is movably connected to the rotating plate, and a torsion spring is sleeved on the rotating rod.

[0012] As a further scheme of the present invention, the adjusting mechanism is in through connection with the air cavity. The adjusting mechanism comprises a sliding groove, a sliding block and an air rod. A sliding groove is formed on the venous tube body, and a sliding block is slidably connected in the sliding groove. An air rod is arranged in the receiving groove, and the air rod is in through connection with the air cavity. One end of the air rod is rotatably connected to the sliding block.

[0013] As a further scheme of the present invention, a wrapping pad is arranged in the receiving groove, and the wrapping pad forms a sealed wrapping for the lower side of the venous tube body and the adjusting mechanism.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. In the initial state of the device, the filling mechanism is in a retracted state, at this time the partitioning mechanism is in a closed state, and the adjusting mechanism is also in a retracted state. The venous tube body is retracted in the receiving groove. At this time, the venous tube body and the arterial tube body are in a parallel state, which can effectively reduce the volume of the device and prevent the formation of a Y shape between the arterial tube body and the venous tube body when the device is placed in the body, thus avoiding the need to enlarge the wound when placing the device and making it more convenient to insert the device, reducing the opening of the wound.

[0016] 2. When the device is placed parallel at a suitable position in the body, turn the screw rod. At this time, the piston plate moves in the piston cavity. Since the support plate is made of flexible rigid material, as the piston plate moves, the support plate gradually elongates. The movement of the piston plate generates air pressure inside it. At this time, the partitioning mechanism is in a closed state. As the air pressure increases, the air pressure enters the filling mechanism, causing the filling mechanism to gradually expand. When the piston plate moves to a suitable position, the filling mechanism completely fills the receiving groove, forming a complete surface with the arterial tube body, thus facilitating the flow control of the arterial tube body and preventing the formation of a concave surface on the arterial tube body, which affects its fixation and flow control.

[0017] 3. After the filling mechanism is filled, it forms a seal. At this time, the push plate pushes open the partitioning mechanism. As the piston plate continues to move, the air pressure enters the air cavity, and at the same time, the gas controls the rotation of the venous tube body through the adjusting mechanism, causing it to form a certain angle with the arterial tube body. This enables the device to change the angle between the two as needed during use, making it more convenient during use, further improving the installation and disassembly convenience of the device, enhancing its safety during use, allowing for multi-angle adjustment during use, improving its practicality, reducing wound trauma, and ensuring patient safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Structural schematic diagram of the front side view of the present invention;

[0020] Figure 2 Cross-sectional structural schematic diagram of the front side view of the present invention;

[0021] Figure 3 For Figure 2 Enlarged view of part A in

[0022] Figure 4 Internal structural schematic diagram of the local front side view of the present invention;

[0023] Figure 5 Internal structural sectional view of the local left side view of the present invention.

[0024] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0025] 1. Arterial tube body; 2. Receiving groove; 3. Piston cavity; 4. Lead screw; 5. Handle; 6. Piston plate; 7. Collar; 8. Push rod; 9. Push plate; 10. Support plate; 11. Filling mechanism; 12. Filling sleeve; 13. Slide bar; 14. Sealing plate; 15. Sealing groove; 16. Partition mechanism; 17. Partition plate; 18. Rotating rod; 19. Rotating plate; 20. Torsion spring; 21. Air cavity; 22. Venous tube body; 23. Adjusting mechanism; 24. Slide groove; 25. Slide block; 26. Air rod; 27. Wrapping pad. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0027] Please refer to Figures 1 - 5 , the present invention provides a technical solution:

[0028] An external blood vessel fixing stent for arteriovenous fistula, comprising an arterial tube body 1 and a venous tube body 22. A receiving groove 2 is provided on the arterial tube body 1, and the venous tube body 22 is rotatably connected in the receiving groove 2. A piston cavity 3 is provided in the arterial tube body 1, a lead screw 4 is threadedly connected in the piston cavity 3, a piston plate 6 is threadedly connected to the lead screw 4, the piston plate 6 is slidably connected in the piston cavity 3, a push rod 8 is fixedly connected to the piston plate 6, a push plate 9 is fixedly connected to one end of the push rod 8, a support plate 10 is fixedly connected to the piston plate 6, a filling mechanism 11 is provided in the receiving groove 2, the filling mechanism 11 is movably connected to the support plate 10, a partition mechanism 16 is installed in the piston cavity 3, the push plate 9 is movably connected to the partition mechanism 16, an air cavity 21 is provided on one side of the partition mechanism 16, and an adjusting mechanism 23 is provided between the venous tube body 22 and the receiving groove 2;

[0029] During operation, the filling mechanism 11 of the device is in a retracted state at the initial state. At this time, the separating mechanism 16 is in a closed state, and the adjusting mechanism 23 is also in a retracted state. The venous tube body 22 is retracted in the receiving groove 2. At this time, the venous tube body 22 and the arterial tube body 1 are in a parallel state, which can effectively reduce the volume of the device and prevent the formation of a Y shape between the arterial tube body 1 and the venous tube body 22 when the device is placed in the body, thus avoiding the need to enlarge the wound when placing the device and making it more convenient to insert the device, reducing the opening of the wound. When the device is placed in parallel at a suitable position in the body, turn the lead screw 4. At this time, the piston plate 6 moves in the piston chamber 3. Since the support plate 10 is made of flexible rigid material, as the piston plate 6 moves, the support plate 10 gradually elongates. The movement of the piston plate 6 generates air pressure inside it. At this time, the separating mechanism 16 is in a closed state. As the air pressure increases, the air pressure enters the filling mechanism 11, causing the filling mechanism 11 to gradually expand. When the piston plate 6 moves to a suitable position, the filling mechanism 11 completely fills the receiving groove 2, forming a complete surface with the arterial tube body 1, thus facilitating the flow control of the arterial tube body 1 and preventing the arterial tube body 1 from forming a concave surface, which affects its fixation and flow control. After the filling mechanism 11 is filled, the filling mechanism 11 forms a seal. At this time, the push plate 9 pushes open the separating mechanism 16. As the piston plate 6 continues to move, the air pressure enters the air chamber 21, and at the same time, the gas controls the rotation of the venous tube body 22 through the adjusting mechanism 23, causing it to form a certain angle with the arterial tube body 1, enabling the device to change the angle between the two as needed during use, making it more convenient during use, further improving the installation and disassembly convenience of the device, enhancing its safety during use, and allowing for multi-angle adjustment during use, thus improving its practicality, reducing wound trauma, and ensuring patient safety.

[0030] As a further aspect of the present invention, a grip 5 is installed at one end of the lead screw 4. A groove is provided on one side of the arterial tube body 1. The grip 5 is located in the groove and can slide vertically on the lead screw 4. The surface of the grip 5 is provided with an anti-slip layer.

[0031] During operation, when it is necessary to turn the lead screw 4, pull the grip 5 to move the grip 5 away from the groove, and then drive the lead screw 4 to rotate by turning the grip 5, causing the piston plate 6 to move in the piston chamber 3, generating air pressure inside it, and then controlling the filling of the groove and the adjustment of the venous tube body 22, making the device more convenient to use and reducing the space occupied by the grip 5 at the same time.

[0032] As a further aspect of the present invention, a collar 7 is sleeved on the piston plate 6. The collar 7 forms a seal with the piston chamber 3, and a sealing sleeve is provided between the piston plate 6 and the lead screw 4.

[0033] During operation, when the piston plate 6 moves, the collar 7 can seal the side of the piston plate 6, thus preventing air leakage when the piston plate 6 is in use. At the same time, the sealing sleeve can seal between the piston plate 6 and the lead screw 4, making it more stable and having stronger sealing performance during use.

[0034] As a further solution of the present invention, the filling mechanism 11 includes a filling sleeve 12, a sliding rod 13, a blocking plate 14 and a blocking groove 15. The filling sleeve 12 is provided in the receiving groove 2. The filling sleeve 12 is a flexible filling layer, and a seal is formed between the filling sleeve 12 and the receiving groove 2. A sliding rod 13 is fixedly connected to the filling sleeve 12, and a blocking plate 14 is fixedly connected to one end of the sliding rod 13;

[0035] During operation, when gas enters between the filling sleeve 12 and the groove, the gas bulges the filling sleeve 12. At this time, the sliding rod 13 slides upward at the same time. As the piston plate 6 continues to move, when the piston plate 6 moves to a suitable position, the filling sleeve 12 bulges to a suitable position, and the sliding rod 13 pulls the blocking plate 14 to move to a suitable position, so that the blocking plate 14 moves to the upper side of the support plate 10. At this time, the support plate 10 can effectively limit the blocking plate 14, and then keep the gas between the filling sleeve 12 and the receiving groove 2 full, preventing it from leaking, and then making the receiving groove 2 in a filled state, preventing the arterial tube body 1 from having a concave surface during equipment use, resulting in defects during its use.

[0036] As a further solution of the present invention, a blocking groove 15 is opened on the top surface of the piston chamber 3, and the blocking plate 14 is movably connected in the blocking groove 15;

[0037] During operation, when the sliding rod 13 moves to a suitable position, the blocking plate 14 moves into the blocking groove 15. At this time, the blocking plate 14 can block the blocking groove 15, thus preventing gas leakage. At the same time, the support plate 10 blocks the blocking plate 14 to prevent it from descending and causing gas leakage, thereby further improving its use safety.

[0038] As a further solution of the present invention, the partitioning mechanism 16 includes a partitioning plate 17, a rotating rod 18, a rotating plate 19 and a torsion spring 20. The partitioning plate 17 is fixedly connected in the piston chamber 3. The rotating rod 18 is rotatably connected in the partitioning plate 17. A rotating plate 19 is installed on the rotating rod 18. The push plate 9 is movably connected to the rotating plate 19. A torsion spring 20 is sleeved on the rotating rod 18;

[0039] During operation, after the filling mechanism 11 finishes filling, the push plate 9 contacts the rotating plate 19. At this time, the push plate 9 pushes the rotating plate 19, causing it to rotate around the rotating rod 18, and simultaneously compressing the torsion spring 20. When the rotating plate 19 rotates, a gap is generated between the rotating plate 19 and the partition plate, allowing gas to enter the air chamber 21. Then, the gas enters the adjusting mechanism 23 through the air chamber 21, enabling the device to complete the adjustment of the venous tube body 22, thereby further improving the convenience of the device during use.

[0040] As a further solution of the present invention, the adjusting mechanism 23 is in through connection with the air chamber 21. The adjusting mechanism 23 includes a sliding groove 24, a slider 25, and an air rod 26. A sliding groove 24 is formed in the venous tube body 22. A slider 25 is slidably connected in the sliding groove 24. An air rod 26 is provided in the receiving groove 2. The air rod 26 is in through connection with the air chamber 21. One end of the air rod 26 is rotatably connected to the slider 25.

[0041] During operation, after the separating mechanism 16 is opened, gas enters the air chamber 21 and simultaneously enters the air rod 26, causing the air rod 26 to expand and contract. When the air rod 26 extends, the air rod 26 pushes the slider 25 to move in the sliding groove 24, causing the venous tube body 22 to rotate. At this time, a certain angle is formed between the venous tube body 22 and the arterial tube body 1. The operator can, according to the cooperation between the gas intake volume and the air rod 26, make the venous tube body 22 and the arterial tube body 1 form different angles, making the device more convenient to operate.

[0042] As a further solution of the present invention, a wrapping pad 27 is provided in the receiving groove 2. The wrapping pad 27 hermetically wraps the lower side of the venous tube body 22 and the adjusting mechanism 23.

[0043] During operation, the wrapping pad 27 is flexible. When the wrapping pad 27 seals the lower side of the venous tube body 22 and the adjusting mechanism 23, it can effectively prevent blood from entering its interior, thus affecting the adjustment and use of the device.

Claims

1. An external vascular fixing stent for an arteriovenous fistula, comprising an arterial tube body (1) and a venous tube body (22), characterized in that: The arterial tube body (1) is provided with a receiving groove (2), the venous tube body (22) is rotatably connected in the receiving groove (2), the arterial tube body (1) is provided with a piston chamber (3), the piston chamber (3) is threadedly connected with a screw rod (4), the screw rod (4) is threadedly connected with a piston plate (6), the piston plate (6) is slidably connected in the piston chamber (3), the piston plate (6) is fixedly connected with a push rod (8), one end of the push rod (8) is fixedly connected with a push plate ( 9), a support plate (10) is fixedly connected to the piston plate (6), a filling mechanism (11) is provided in the receiving groove (2), the filling mechanism (11) and the support plate (10) are movably connected, a partition mechanism (16) is installed in the piston cavity (3), the push plate (9) and the partition mechanism (16) are movably connected, an air cavity (21) is provided on one side of the partition mechanism (16), and an adjustment mechanism (23) is provided between the venous tube body (22) and the receiving groove (2); During operation, when the partition mechanism (16) is opened, gas enters the gas cavity (21), and the gas controls the rotation of the venous tube body (22) through the regulating mechanism (23).

2. The external vascular fixing stent for arteriovenous fistula according to claim 1, characterized in that: A handle (5) is installed at one end of the screw rod (4), a groove is opened on one side of the arterial tube body (1), and the handle (5) is located in the groove. The handle (5) can slide vertically on the screw rod (4), and a non-slip layer is provided on the surface of the handle (5).

3. The external vascular fixing stent for an arteriovenous fistula according to claim 1, characterized in that: A sleeve ring (7) is sleeved on the piston plate (6), the sleeve ring (7) and the piston chamber (3) form a seal, and a sealing sleeve is provided between the piston plate (6) and the screw rod (4).

4. The external vascular fixing stent for arteriovenous fistula according to claim 1, characterized in that: The filling mechanism (11) comprises a filling sleeve (12), a sliding rod (13), a sealing plate (14) and a sealing groove (15); a filling sleeve (12) is arranged in the receiving groove (2); the filling sleeve (12) is a flexible filling layer; a seal is formed between the filling sleeve (12) and the receiving groove (2); a sliding rod (13) is fixedly connected to the filling sleeve (12); and a sealing plate (14) is fixedly connected to one end of the sliding rod (13).

5. The external blood vessel fixing stent for arteriovenous fistula according to claim 4, characterized in that: A sealing groove (15) is provided on the top surface of the piston chamber (3), and the sealing plate (14) is movably connected in the sealing groove (15).

6. The external blood vessel fixing stent for arteriovenous fistula according to claim 1, characterized in that: The partition mechanism (16) comprises a partition plate (17), a rotating rod (18), a rotating plate (19) and a torsion spring (20); the partition plate (17) is fixedly connected in the piston chamber (3); the rotating rod (18) is rotatably connected in the partition plate (17); the rotating plate (19) is mounted on the rotating rod (18); the push plate (9) and the rotating plate (19) are movably connected; and the rotating rod (18) is sleeved with a torsion spring (20).

7. The external blood vessel fixing stent for arteriovenous fistula according to claim 1, characterized in that: The regulating mechanism (23) is connected to the air cavity (21) through and through, and the regulating mechanism (23) comprises a slide groove (24), a slider (25) and an air rod (26). The venous tube body (22) is provided with a slide groove (24), and the slider (25) is slidably connected in the slide groove (24). The storage groove (2) is provided with an air rod (26), and the air rod (26) is connected to the air cavity (21) through and through, and one end of the air rod (26) is rotatably connected to the slider (25).

8. The external blood vessel fixing stent for arteriovenous fistula according to claim 1, characterized in that: A wrapping pad (27) is provided in the storage groove (2), and the wrapping pad (27) forms a sealed wrapping around the lower side of the venous tube body (22) and the regulating mechanism (23).

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