Hemostatic clip with spring force to open with degradation structure

Abstract

The application relates to a hemostatic clamp with a spring force opening structure and a degradable structure, which is used under an endoscope. The hemostatic clamp is composed of a clamp jaw part and an operating part. The clamp jaw part is composed of a clamp jaw tube, an elastic sheet, a positioning pin, a clamp sheet, a pulley, a spring, a connecting pin, a clamp sheet fixing seat, a mandrel and a connecting tube. The operating part of the hemostatic clamp is composed of a spring hose, a connecting pin, a swivel ring, a swivel ring fixing seat and a hook. The hemostatic clamp has a simple and ingenious structure, and is convenient and flexible to operate. The application adopts a polylactic acid degradable material, a convex degradable hanging block is arranged on the elastic sheet at the bottom of the clamp sheet, and the degradable structure is used to control the falling time of the clamp sheet. The spring on the positioning pin and the roller are used to control the opening of the clamp sheet, and the clamp sheet is discharged out of the body along with the body fluid. The application controls the falling time of the clamp sheet of the hemostatic clamp through the design of the degradable structure, and avoids the secondary injury caused by the long-term retention in the body after the operation.

Description

Technical Field

[0001] This invention belongs to the field of medical hemostasis equipment technology, and relates to a hemostatic clip with a degradable structure that opens using spring force for use under endoscopy. Background Technology

[0002] With the development of medical technology, the use of hemostatic clips under endoscopy has become increasingly sophisticated. Clips can also be used as markers under endoscopic and X-ray monitoring, as anchoring devices for instruments such as feeding tubes, and even as closure devices for conservative treatment of gastrointestinal perforations. However, current hemostatic clips are made entirely of metal, and the corrosion effect of the clips over time is unknown. Therefore, the time it takes for the clips to loosen is unpredictable, and they may remain in the body for a long time, potentially leading to wound lesions and interfering with CT scans and other examinations.

[0003] In a patent document published in China with patent application number CN108013914A, a stop step is provided at the tail of the inner wall of a clamp tube. When two clamps are clamped, the protruding part of the tail of the clamp is engaged with the stop step, and the stop pin is fixed at the front of the clamp tube to restrict the clamp fixing seat from sliding out of the clamp tube. However, the process of the clamp loosening is unpredictable and will affect the examination and physical recovery.

[0004] Current hemostatic clips are made entirely of metal, and the corrosion effect of the clips over time is unknown. Therefore, it is impossible to predict when the clips will loosen, and they may remain in the body for a long time, which may lead to lesions at the wound site and affect health. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies, particularly the fact that current hemostatic clips are made entirely of metal, and the corrosion effect of the clips is unknown. Therefore, the time it takes for the clips to loosen is unpredictable, and they may remain in the body for a long time, potentially causing wound lesions and affecting health. Based on these problems, this invention provides a hemostatic clip with a degradable structure that opens using spring force. The hemostatic clip includes an operating part and a clamping part. The operating part allows the hemostatic clip to be inserted into the wound and clamped to complete the hemostasis operation. Then, a degradable component controls the clamping part to detach and be expelled from the body. This invention uses polylactic acid (PLA) as a degradable material. A raised degradable hanging block is installed on the elastic sheet at the bottom of the clip, aiming to control the clip detachment time using the degradable structure. Furthermore, a positioning pin is installed at the end of the clamp tube, with a spring fitted on the positioning pin. Each end of the spring is connected to a pulley, and the pulleys generate rolling friction with the clip. The spring tension effectively solves the problem of opening and loosening the hemostatic clip. The spring device and the biodegradable block on the elastic plate at the end of the clamp allow the clamp to hold the wound in place after healing. The clamp part relies on the decomposition of the biodegradable hook at the bottom of the clamp and the elastic force of the spring to allow the clamp to open and detach from the body in time, so that it can be discharged from the body with the body fluids, avoiding secondary damage caused by long-term retention in the body after surgery.

[0006] The technical solution adopted in this invention is a hemostatic clip with a degradable structure that is opened by spring force. The hemostatic clip consists of a clamping part and an operating part.

[0007] The clamping part consists of a clamping tube 5, an elastic plate 6, a positioning pin 7, a clamping plate 8, a pulley 9, a spring 10, a connecting pin 11, a clamping plate fixing seat 4, a connecting tube 3, and a spindle 2; one end of the spindle 2 is installed in the spring hose 1, and the other end contacts the clamping plate fixing seat 4 and is fixed by an interference fit through the connecting tube 3; a positioning hole 5a is machined in the clamping tube 5, the positioning pin 7 is installed in the positioning hole 5a, and the tail of the inner wall of the clamping tube 5 has a stop step 5b and a first hook hole 5c is also machined;

[0008] The clip 8 is an elastic metal sheet with a symmetrical structure. The clip 8 consists of a clip claw end 8a, a clip forearm 8b, and a clip rear arm 8c. The forearm end 8a of the clip 8 has serrated edges that interlock. The clip rear arm 8c is divided into two parts: one part is the tail end 8e of the clip 8, which has a tail opening 8f. The opening 8f is a "C"-shaped opening facing the rear. The other part is a curved elastic sheet 6 with elongated reinforcing ribs 8d. A degradable block 6a is installed on the tail end of the elastic sheet 6. The clip rear arm 8... c is installed in the clamp tube 5, and the clamp plate fixing seat 4 is installed inside the clamp tube 5 and can move back and forth; the front end of the clamp plate fixing seat 4 has a two-wing structure, and the two wings have the same through holes on the same axis; after the connecting pin 11 is installed in the opening hole 8f of the two clamp plates 8, the two ends of the connecting pin 11 are respectively inserted into the through holes on the two wings at the front end of the clamp plate fixing seat 4 and fixed between the two wings; the figure-eight shaped spring 10 is installed on the positioning pin 7, and two pulleys 9 are respectively installed at the two ends of the spring 10 and respectively contact the front arm 8b of the clamp plate; the rear arm 8c of the clamp plate is installed in the clamp tube 5.

[0009] The operating part of the hemostatic clip consists of a spring hose 1, a connecting pin 11, a swivel 12, a second hook hole 12a, a swivel fixing seat 13, and a hook 14. The hook 14 is made of elastic metal and consists of two V-shaped hook arms 14b and a hook middle hole 14a. The front end of the hook arm 14b has a hook claw 14c.

[0010] The distal end of the spring hose 1 is fixed on the swivel fixing seat 13; the front of the swivel 12 is provided with two symmetrical second hook holes 12a, and the tail of the clamp tube 5 is provided with two symmetrical first hook holes 5c. The hook 14 is fitted onto the spindle 2 through the hook middle hole 14a. The hook claws 14c of the hook 14 are respectively installed in the second hook hole 12a at the front of the swivel 12 and the first hook hole 5c of the clamp tube 5. The swivel 12 is fixed between the swivel fixing seat 13 and the spring hose 1 by its own limiting step. The inner diameter of the hook 14 is larger than the outer diameter of the spindle 2, and it can slide freely on the spindle 2.

[0011] The beneficial effects of this invention are that it uses polylactic acid, a biodegradable material, which is harmless to the human body. The detachment time of the clip can be predicted based on the decomposition rate of the biodegradable hook in the human body. The structure is simple and easy to install. Only a raised biodegradable hook is installed on the elastic plate at the bottom of the clip, using the biodegradable structure to control the clip detachment time. In addition, a positioning pin is installed at the end of the clamp tube, and a spring is fitted on the positioning pin. Each end of the spring is connected to a pulley, and the pulleys generate rolling friction with the clip. The spring tension effectively solves the problem of the hemostatic clip opening. The spring device and the biodegradable block on the elastic plate at the tail of the clip enable the clip to open and detach from the body promptly after wound healing, relying on the decomposition of the biodegradable hook at the bottom of the clip and the elastic force of the spring, allowing the clip to be excreted with bodily fluids. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the hemostatic clip of the present invention before clamping. In the diagram, 1-spring hose, 2-mandrel, 3-connecting tube, 4-clamp fixing seat, 5-clamp tube, 6-elastic sheet, 7-positioning pin, 8-clamp, 9-pulley, 10-spring, 11-connecting pin, 12-swivel, 13-swivel fixing seat, 14-hook.

[0013] Figure 2 This is a schematic diagram of the clamping part of the hemostatic clip of the present invention after clamping. In the diagram, 5-clamping tube, 5a-positioning hole, 5b-stopping step, 5c-first hook hole, 6-elastic sheet, 8-clamping piece, 9-pulley, 10-spring, A-wound site.

[0014] Figure 3 This is a schematic diagram of the operating part of the hemostatic clip of the present invention. In the diagram, 1-spring hose, 2-spindle, 3-connecting tube, 4-clamp fixing seat, 11-connecting pin, 12-rotary ring, 12a-second hook hole, 13-rotary ring fixing seat, 14-hook.

[0015] Figure 4This is a schematic diagram of the clip structure of the hemostatic clip of the present invention. Wherein, 6-elastic sheet, 6a-biodegradable hanging block, 8-clamp, 8a-clamp claw end, 8b-clamp forearm, 8c-clamp rear arm, 8d-clamp rear arm reinforcing rib, 8e-clamp tail, 8f-clamp tail opening.

[0016] Figure 5 This is a schematic diagram of the hook structure of the hemostatic clip of the present invention. Wherein, 14-hook, 14a-hook center hole, 14b-hook arm, 14c-hook claw. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and technical solutions.

[0018] like Figure 1 , 2 The hemostatic clip shown includes an operating part and a clamping part. The operating part allows the hemostatic clip to be inserted into wound A and clamped to achieve hemostasis. Then, the clamping part is controlled by a biodegradable component to detach and be expelled from the body.

[0019] like Figure 1 , 2 The clamping part of the hemostatic clips shown in Figures 3 and 4 consists of a clamping piece 8, an elastic piece 6, a clamping tube 5, a positioning pin 7, a spring 10, a pulley 9, a connecting pin 11, a clamping piece fixing seat 4, a connecting tube 3, and a connecting mandrel 2. One end of the mandrel 2 contacts the clamping piece fixing seat 4 and is interference-fitted through the connecting tube 3. The clamping piece fixing seat 4 is placed inside the clamping tube 5 and can move back and forth. The front end of the clamping piece fixing seat 4 has two wings, and the two wings have identical through holes on the same axis. The connecting pin 11 is inserted into the through hole to connect the deformation hole at the tail of the clamping piece to the clamping piece fixing seat and is fixed between the two wings.

[0020] The clamping piece 8 is an elastic metal sheet with a symmetrical structure. The clamping piece 8 consists of clamping claw ends 8a, clamping front arms 8b, and clamping rear arms 8c. The clamping claw ends 8a are serrated and interlock. The clamping rear arms 8c are divided into two parts: one part is the tail end 8e of the clamping piece 8, which has a C-shaped opening 8f facing rearward. The other part is a curved elastic piece 6 with elongated reinforcing ribs 8d. A degradable block 6a is installed at the tail end of the elastic piece 6. The clamping rear arms 8c are installed in the clamp tube 5, and the tail end 8e of the clamping piece 8 has the opening 8f. A connecting pin 11 passes through the openings 8f of both clamping pieces 8 and is fixed to the front end of the clamping piece fixing seat 4. The end of the inner wall of the clamp tube 5 is provided with a stop step 5b. When the two clamping plates 8 are clamped, the hook 6a of the elastic plate 6 is engaged with the stop step 5b, and the positioning pin 7 is fixed at the front of the clamp tube 5, thereby restricting the clamping plate fixing seat from sliding out of the clamp tube 5.

[0021] The inner side of the rear arm 8d of the clamping plate 8 has a certain friction force, and it undergoes pure rolling friction with the pulley 9. The two pulleys 9 are respectively fixedly connected to the two ends of the "eight"-shaped spring 10, and are connected to the positioning pin 7 in the middle and can swing.

[0022] like Figure 3 , 5 As shown, the operating part consists of a spring hose 1, a connecting pin 11, a swivel 12, a swivel fixing seat 13, and a hook 14. The swivel 12 has two symmetrical second hook holes 12a machined at its front. A spindle 2 is installed inside the spring hose 1, which drives the clamp fixing seat of the clamping part to move up and down. The distal end of the spring hose 1 is fixed to the swivel fixing seat 13. The hook 14 is made of elastic metal and consists of two V-shaped hook arms 14b and a hook center hole 14a. The front end of the hook arms 14b has a hook claw 14c.

[0023] The swivel 12 has two symmetrical second hook holes 12a at its front, and the clamp tube 5 has two symmetrical first hook holes 5c at its tail. The hook 14 is fitted onto the spindle 2 through the hook center hole 14a. The hook claws 14c of the hook 14 are respectively installed in the second hook holes 12a at the front of the swivel 12 and the first hook holes 5c of the clamp tube 5. The swivel fixing seat 13 is detachably connected to the clamp tube 5 in the clamping part. The swivel 12 is fixed between the swivel fixing seat 13 and the spring hose 1 by a limiting step. The inner diameter of the hook 14 is larger than the outer diameter of the spindle 2, allowing it to slide freely on the spindle 2. The spindle 2 drives the connecting tube 3 or the clamp fixing seat 4 to push the hook outward, thereby causing the hook claws 14c to disengage from the clamp tube 5, thus separating the clamp tube 5 from the swivel 12.

[0024] The hemostatic clip achieves clamping, releasing, separation from the clamping part, and detachment of the clamping part through its operating mechanism. The specific operating steps for the hemostatic clip are as follows:

[0025] Step 1: The operating unit moves the clamp fixing seat 4 downward through the spindle 2, and the clamp 8 is put into the clamp tube 5 to clamp the wound.

[0026] Step 2: When the two clamping plates 8 clamp the wound, the hook 6a of the elastic plate 6 engages with the stop step 5b, thereby preventing the clamping plate fixing seat from sliding out of the clamp tube 5. Continue pulling the mandrel 2 to deform the opening hole 8f at the tail of the clamping plate. When the pulling force exceeds a certain value, it will tilt due to deformation, thereby disengaging from the first hook hole 8c of the clamp tube 8 and separating the clamp tube 8 from the rotating ring 10.

[0027] Step 3: Pull the spindle 2 while simultaneously lifting the hook 14 from the connecting tube 3. The hook 14 is made of elastic metal. When the pulling force exceeds a certain value, it will deform and tilt, thus disengaging from the first hook hole 5c of the clamp tube, thereby separating the clamp tube 5 from the swivel ring 12.

[0028] Step 4: Over time, the biodegradable hanging block 6a on the elastic sheet 6 gradually degrades and disappears as it decomposes. The hook 14 will gradually slide off the boss constraint and disengage from the stop step 5b of the clamp tube 5, allowing the clamp 8 to gradually slide out of the clamp tube 5. A spring 10 is fitted on the positioning pin 7. The elastic force of the spring 10 allows the clamp 8 to open. Each end of the spring 10 is connected to a pulley 9, and the pulleys 9 and clamp 8 are in a rolling connection. The elastic force of the spring 10 on the positioning pin 7 and the pulleys 9 work together to loosen the hemostatic clamp and allow it to be discharged from the body with the bodily fluids.

Claims

1. A hemostatic clip with a degradable structure that opens with spring force, the hemostatic clip comprising a clamping part and an operating part; The clamping part is composed of a clamping tube (5), an elastic plate (6), a positioning pin (7), a clamping plate (8), a pulley (9), a spring (10), a connecting pin (11), a clamping plate fixing seat (4), a connecting tube (3), and a connecting mandrel (2); one end of the mandrel (2) contacts the clamping plate fixing seat (4) and is fixed by interference fit through the connecting tube (3); a positioning hole (5a) is machined in the clamping tube (5), the positioning pin (7) is installed in the positioning hole (5a), and the tail of the inner wall of the clamping tube (5) has a stop step (5b) and a first hook hole (5c) is also machined. The clip (8) is an elastic metal sheet with a symmetrical structure; the clip (8) consists of a clip claw end (8a), a clip forearm (8b), and a clip rear arm (8c); among which, The front end of the clip (8) is called the clip claw end (8a), which has a serrated shape and can interlock with each other; the rear arm (8c) of the clip is divided into two parts: one part is the tail of the clip (8), which is the clip tail (8e), and has a clip tail opening hole (8f). The opening hole (8f) is a "C" shaped opening, and the opening direction is towards the rear end; the other part is a curved elastic sheet (6), which is equipped with a long strip of reinforcing rib (8d). A degradation block (6a) is installed on the tail of the elastic sheet (6). When the clamping piece (8) is clamped, the degradation block (6a) of the elastic piece (6) is engaged on the stop step 5b, and the rear arm (8c) of the clamping piece is installed in the clamp tube (5): the front end of the clamping piece fixing seat (4) is a two-wing structure, and the two wings have the same through hole on the same axis; after the connecting pin (11) is installed in the opening hole (8f) of the two clamping pieces (8), the two ends of the connecting pin (11) are respectively inserted into the through holes on the two wings at the front end of the clamping piece fixing seat (4) and fixed between the two wings; The clamp fixing seat (4) is installed inside the clamp tube (5) and can move back and forth; the figure-eight shaped spring (10) is installed on the positioning pin (7), and two pulleys (9) are installed at both ends of the spring (10) respectively and contact the clamp front arm (8b); the clamp rear arm (8c) is installed in the clamp tube (5); The operating part of the hemostatic clip consists of a spring hose (1), a swivel (12), a swivel fixing seat (13), and a hook (14); the swivel (12) is machined with a second hook hole (12a), the hook (14) is made of elastic metal, and the hook (14) consists of two V-shaped hook arms (14b) and a hook middle hole (14a). The front end of the hook arm (14b) has a hook claw (14c). The spindle (2) is installed in the spring hose (1), and the far end of the spring hose (1) is fixed on the swivel fixing seat (13). The front part of the swivel (12) is provided with two symmetrical second hook holes (12a), and the tail part of the clamp tube (5) is provided with two symmetrical first hook holes (5c). The hook (14) is fitted onto the spindle (2) through the middle hole (14a) of the hook. The hook claws (14c) of the hook (14) are respectively installed in the second hook hole (12a) at the front of the swivel (12) and the first hook hole (5c) of the clamp tube (5). The swivel (12) is fixed between the swivel fixing seat (13) and the spring hose (1) by its own limiting step. The inner diameter of the hook (14) is larger than the outer diameter of the spindle (2) and can slide freely on the spindle (2).

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