Hemostatic clip with split structure

Abstract

The application discloses a hemostatic clamp with a split structure, which comprises a control part and a release device; the control part comprises a handle, a handle, a spring pipe, a mandrel (9), a tail end hooking clamp (1), an inner adapter (4) and a tightening pipe (2); the handle is connected with the mandrel (9); the inner adapter (4) is arranged in the tightening pipe (2); the clamp (1) is arranged on the inner adapter (4); the release device comprises a middle ring (5) and an outer ring (8); the handle is connected with the outer ring (8) through the spring pipe; the outer ring (8) is connected with the tightening pipe (2) through the middle ring (5); the distal end of the mandrel (9) is sequentially penetrated through the outer ring (8), the middle ring (5) and the tightening pipe (2) and is connected with the inner adapter (4); the outer ring (8) is provided with a limiting mechanism I for limiting the radial movement of the middle ring (5) to the distal end; the middle ring (5) is provided with a limiting mechanism II for limiting the radial movement of the inner adapter (4) to the proximal end.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary devices, and in particular to a hemostatic clip release part used in conjunction with an endoscope. Background Technology

[0002] Endoscopic hemostasis is an important treatment method for gastrointestinal bleeding. Commonly used endoscopic hemostasis methods include laser coagulation, electrocoagulation, local injection of hemostatic drugs, drug spraying, and hemostatic clip closure.

[0003] Among them, the hemostatic clip closure method is the most effective and clinically valuable non-surgical treatment for gastrointestinal bleeding at present due to its characteristics of minimal trauma, rapid hemostasis, low rebleeding rate, few complications, and definite curative effect.

[0004] For medical devices used in hemostatic clip closure, clinical practice requires a clamping device that can flexibly adjust the clamping angle, release decisively, and be able to be reopened after release.

[0005] The aforementioned hemostatic clips are used in the confined space inside the human body, requiring a unified design (too many or overly complex assembly structures can easily cause parts to fall off, leading to medical accidents). Existing production methods generally employ CNC machining, and the cost of the consumable tightening tube (which remains inside the body with the clip for a period of time) is extremely high. Meanwhile, this technical solution solves the assembly problem. Currently, CNC-machined parts, due to the machining method, inevitably require assembly from smaller parts to larger ones. However, with the modular structure of this technical solution, parts can be inserted first and then welded, thus resolving the assembly difficulty. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides a hemostatic clip with a simple structure and low cost, comprising a control unit and a release device; the control unit includes a handle, a gripper, a spring tube, a mandrel, a clip with a barb at the tail end, an inner connector, and a tightening tube; the handle is connected to the mandrel; the inner connector is disposed inside the tightening tube, and the clip is disposed on the inner connector; the release device includes a middle ring and an outer ring; the handle is connected to the outer ring through the spring tube; the outer ring is connected to the tightening tube through the middle ring; the distal end of the mandrel passes through the outer ring, the middle ring, and the tightening tube in sequence, and is connected to the inner connector; the outer ring is provided with a limiting mechanism I that restricts the radial movement of the middle ring to the distal end; the middle ring is provided with a limiting mechanism II that restricts the radial movement of the inner connector to the proximal end.

[0007] As an improvement to the hemostatic clip with a split structure described in this invention, the middle ring includes a front part and a rear part; the front part of the middle ring is fitted inside the tightening tube; the rear part of the middle ring is fitted inside the outer ring; an outer connecting ring is provided on the outer side wall of the rear part of the middle ring, and a protrusion is provided on the inner side wall of the distal end of the outer ring, the protrusion and the outer connecting ring forming a limiting mechanism I; an inner connecting ring is provided on the inner side wall of the rear part of the middle ring, the inner connecting ring forming a limiting mechanism II.

[0008] As a further improvement to the hemostatic clip with a split structure described in this invention, the front part and the rear part of the middle ring can withstand a maximum force of 30N.

[0009] As a further improvement to the hemostatic clip with a split structure described in this invention, a C-shaped opening is provided at the front of the middle ring; a V-shaped spring is provided at the rear of the middle ring relative to the C-shaped opening; the opening of the V-shaped spring is engaged with the C-shaped opening.

[0010] As a further improvement to the hemostatic clip with a split structure described in this invention, a C-shaped opening is provided at the rear of the middle ring; a V-shaped spring is provided at the front of the middle ring relative to the C-shaped opening; the opening of the V-shaped spring is engaged with the C-shaped opening.

[0011] As a further improvement to the hemostatic clip with a split structure described in this invention, the front part of the middle ring is welded and fixed to the outer ring; the front part of the middle ring is welded and fixed to the inner ring; and the rear part of the middle ring is welded and fixed to the tightening tube.

[0012] As a further improvement of the hemostatic clip with a split structure described in this invention, the tightening tube is a cylindrical structure with a hollow center, and its distal end is provided with a limiting mechanism III to prevent the clip from slipping out, and its proximal end is provided with a limiting mechanism IV to limit the position of the clip after it is clamped.

[0013] As a further improvement to the hemostatic clip with a split structure described in this invention, the limiting mechanism III consists of two limiting baffles symmetrically arranged on the distal end face of the tightening tube; the two limiting baffles are bent inwards respectively.

[0014] As a further improvement to the hemostatic clip with a split structure described in this invention, the limiting mechanism IV is a limiting hole I provided on the proximal side wall of the tightening tube relative to the barb.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1) The split structure simplifies the part structure, reduces manufacturing costs, and solves the problem that the assembly of the prior art must follow the principle of "small into large" and realizes the "into" first and then welding, thus solving the existing assembly problem; 2) It simplifies manufacturing and part construction; 3) Functionally, it is completely consistent with the CNC machined parts, and the clamping part and the release part are completely and cleanly separated; 4) After the clamp is released and closed, it can be opened and released again. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of a structure consisting of a central ring, an outer ring, an inner ring, and a tightening tube;

[0018] Figure 3 for Figure 2 Schematic diagram of the structure after the release of the Zhongzhonghuan ring;

[0019] Figure 4 for Figure 2 A detailed structural diagram of the Central Ring Road;

[0020] Figure 5 for Figure 1 A schematic diagram of another structure of the middle ring, outer ring, inner ring, and tightening tube;

[0021] Figure 6 for Figure 5 Schematic diagram of the structure after the release of the Zhongzhonghuan ring;

[0022] Figure 7 for Figure 5 A detailed structural diagram of the Central Ring Road;

[0023] Figure 8 for Figure 1 Schematic diagram of the closed state of the middle clip;

[0024] Figure 9 for Figure 8 Diagram of the clip opening process. Detailed Implementation

[0025] Example 1 Figures 1-9 A hemostatic clip with a split structure is presented. The hemostatic clip includes a control part and a release device; the control part includes a sliding handle, a handle with a built-in groove, a spring tube, a spindle 9 (the spindle 9 is a metal monofilament or rope), an inner connector 4, and a clip 1; the release device includes a middle ring 5, an outer ring 6, an inner ring 7, an outer ring 8, and a tightening tube 2.

[0026] The sliding handle is fitted into the groove of the handle, and the far end of the sliding handle is fixed to the near end of the spindle 9.

[0027] The clamping piece 1 can be two separate clamping pieces or one-piece clamping pieces; this embodiment provides a separate type, where two symmetrically arranged clamping pieces 1 form a clamp. The clamping piece 1 described above, from left to right, consists of a tail, a rear arm, a forearm, and a claw end. The connection between the tail and the rear arm has a certain curvature, and the entire clamping piece 1 or the connection part is made of a flexible metal material. During clamping, the elastic force generated by this curvature enables the clamp to open and close. The tail section has a hole I (which is a connecting hole, connected to the inner seat 4 via a pin 3). One or two protruding barbs are provided at the end of the tail section (the barbs are limiters when the clamp is closed, achieving the function of closing and locking through the limit hole of the tightening tube 2). The forearm has a hole II (the shape of hole II can be circular, elliptical, tangent between large and small circles, or trapezoidal, etc., and the number of holes II can be one or several). The setting of this mechanism improves the expandability of the related products of the present invention. Through hole II, linkage with other related equipment can be realized. A tooth I is provided at the front end of the claw end. The teeth I of the two clamping plates 1 are in a mutually meshing state (for example, one is a single tooth and the other is a double tooth, or the two teeth are in a mutually meshing state, which is mainly a conventional design for clamping stability).

[0028] The tightening tube 2 of this invention is cylindrical with an internal hollow structure, forming an open cavity at both the top and bottom. A limiting mechanism III is provided at the distal end of the tightening tube 2 (the clamping part is the distal end, and the handle part is the proximal end, the position defined by the distance from the operator) to prevent the clamping piece 1 from protruding from the tightening tube 2. This limiting mechanism consists of two symmetrical limiting baffles 20. The limiting baffles 20 are bent inwards, and after bending, the two gaps formed between the limiting baffles 20 and the distal end of the tightening tube 2 are the protrusion positions of the clamping piece 1. A limiting mechanism IV is provided at the proximal end of the tightening tube 2 to limit the position of the clamping piece 1 after clamping. This limiting mechanism IV consists of a limiting hole carved through the side wall of the tightening tube 2. The elastic force brought by the curvature of the clamping piece 1 causes the barbs of the two clamping pieces 1 to press against the inner wall of the tightening tube 2. Once the barbs reach the position of the limiting hole, the barbs of the clamping piece 1 can be locked in the limiting hole, restricting the movement of the clamping piece 1 to the far end.

[0029] A central ring 5 is provided at the proximal end of the tightening tube 2. The central ring 5 is a cylinder with an outer diameter the same as the inner diameter of the tightening tube 2, and is hollow inside. The central ring 5 includes a front part 51 and a rear part 52. The front part 51 is fitted into the proximal end of the tightening tube 2 and then fixed by welding. A break point is provided between the front part 51 and the rear part 52 (for example, a break point that can be directly torn within 30N force). An inner connecting ring 7 is provided on the inner side wall of the rear part 52 and then fixed by welding. An outer connecting ring 6 is fitted on the outer side wall of the rear part 52 and then fixed by welding. The outer connecting ring 6 is inside the outer ring 8 and has a clearance fit with the outer ring 8. A protruding limiting block (circular protrusion along the inner side wall of the distal end of the outer ring 8) is provided on the inner side wall of the outer ring 8. The limiting block can prevent the outer connecting ring 6 from moving radially to the distal end. The outer diameter of the tightening tube 2 is at least the same as the inner diameter of the outer ring 8, or the outer diameter of the tightening tube 2 is at least the same as the outer diameter of the outer ring 8.

[0030] The distal end of the handle is fixed to the proximal end of the spring tube, and the distal end of the spring tube is fixed to the proximal end of the outer ring 8 (welded); the spring tube is fitted on the outside of the spindle 9, and the lower end of the sliding handle is connected to the outer ring 8 through an external protective shell, which is on the outside of the spring tube.

[0031] The tails of the two clips 1 are inserted into the tightening tube 2 from the far end of the tightening tube 2. The pin 3 combines the two clips 1 through the hole I of the two clips 1 and connects the two clips 1 to the inner connector 4 through the pin 3.

[0032] The proximal end of the inner connector 4 is provided with a connecting part that connects to the spindle 9. Through this connecting part, the distal end of the spindle 9 is fixed to the proximal end of the inner connector 4. The distal end of the inner connector 4 is provided with a connecting part between it and the clip. This connecting part has two configuration methods. One method is to provide a raised C-shaped hole at the distal end of the inner connector 4, with the notch of the C-shaped hole facing the distal end. Protective wings are provided on both sides of the raised C-shaped hole. Compared with the prior art solution of providing a C-shaped hole on the clip, the technical solution of the present invention is more stable when separating because after the clip separates in a C-shape, there is no fixing mechanism between the two clips of the clip, which is easy to fall apart. However, through the technical improvement of the present invention, this potential risk is completely eliminated.

[0033] After inserting the pin 3 into the holes I and C-shaped holes at the tail of the clip 1 in sequence, the clip 1 can be connected to the inner seat 4. The pin 3 can also be a solid rod or a straight tube (or a straight solid rivet or a hollow rivet). In the closed state, the clip 1 is retracted into the tightening tube 2.

[0034] In actual operation, the barbs at the tails of the two clamping plates 1 can be limited by two or more symmetrical limiting holes at the tail of the tightening tube 2 to prevent the clamping plates from moving forward. Once the barbs at the tails of the two clamping plates 1 are pulled to the position of the limiting hole, the barbs will hook into the hole. Since the two clamping plates 1 are made of elastic metal material, the elastic force brought by the curvature cooperates with the inner cavity of the tightening tube 2 to complete the clamping function, and then the limiting function of the limiting hole completes the fixation.

[0035] The radial movement of the two clamping plates 1 is accomplished by controlling the spindle 9 through the sliding handle; the sliding handle controls the forward and backward radial movement of the spindle 9, the spindle 9 controls the inner connector 4, and the inner connector 4 drives the two clamping plates 1. Because of the inner ring 7 set in the inner ring of the rear part 52 of the middle ring, when the inner seat 4 moves radially towards the proximal end, it gets stuck in the position of the inner ring 7. At this time, the inner seat 4 moves radially towards the proximal end with the inner ring 7, the inner ring 7 moves radially towards the proximal end with the middle ring 5, and the middle ring 5 drives the outer ring 6 to move radially towards the proximal end. The tightening tube 2 is stuck on one side of the outer ring 8. Therefore, when the middle ring 5 moves radially towards the proximal end, once the tightening tube 2 is stuck on one side of the outer ring 8, it cannot achieve further radial movement towards the proximal end. At this time, when a force of more than 30N is applied, the inner seat 4 is subjected to force, and the inner ring 7 causes the front part 51 and the rear part 52 of the middle ring to break and separate (the front part 51 of the middle ring is welded and fixed to the tightening tube 2, and the inner ring 7 on the inner side of the rear part 52 of the middle ring is stuck in the inner seat 4). The protruding barb of the clamp is stuck into the limiting hole at the proximal end of the tightening tube 2.

[0036] The outer ring 8 is an intermediate body connecting the spring tube and the clamping part. The outer ring 8 and the spring tube are welded together.

[0037] Assembly Method 1:

[0038] The inner ring 7 is welded to the inner side of the rear part 52 of the middle ring;

[0039] The outer connecting ring 6 is welded to the outer side of the rear part 52 of the middle ring;

[0040] The middle ring 5 is fitted into the outer ring 8 from the proximal end of the outer ring 8;

[0041] The end face of the front end of the middle ring 51 is welded to the end face of the rear end of the tightening tube 2;

[0042] The outer ring 8 is welded to the spring tube.

[0043] Assembly Method Two:

[0044] 8 pre-reserved welding holes on the outer ring;

[0045] The inner ring 7 is welded to the inner side of the rear part 52 of the middle ring;

[0046] Middle Ring 5 is fitted into Outer Ring 8 from the far end of Outer Ring 8;

[0047] Insert the outer ring 6 into the outer ring 8 from the proximal end of the outer ring 8;

[0048] The outer ring 6 is welded to the outer side of the rear part 52 of the middle ring through the welding hole reserved in the outer ring 8;

[0049] The outer ring 8 is welded to the spring tube.

[0050] In Example 2 and Example 1, the limiting mechanism of the tightening tube 2 is a pin. A hole is made at the front end of the tightening tube 2, and a horizontal pin is inserted. The pin divides the front end of the tightening tube 2 into two parts, which serve as the protrusion outlets of the clamping piece 1.

[0051] In Example 3 and Example 1, the inner connector 4 is provided with two symmetrical protective wings at its far end, and C-shaped holes with upward openings are provided on the protective wings.

[0052] Example 4: A C-shaped opening is provided at the front part 51 of the middle ring; a V-shaped spring is provided at the rear part 52 of the middle ring relative to the C-shaped opening; the opening of the V-shaped spring is engaged with the C-shaped opening.

[0053] Example 5: A C-shaped opening is provided at the rear part 52 of the middle ring; a V-shaped spring is provided at the front part 51 of the middle ring relative to the C-shaped opening; the opening of the V-shaped spring is engaged with the C-shaped opening.

[0054] Finally, it should be noted that the above-described embodiments are merely one specific example of the present invention. Obviously, the present invention is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A hemostatic clip with a split structure, comprising a control unit and a release device; the control unit includes a handle, a gripper, a spring tube, a spindle (9), a clip (1) with a barb at the tail end, an inner connector (4), and a tightening tube (2); the handle is connected to the spindle (9); the inner connector (4) is disposed inside the tightening tube (2); the clip (1) is disposed on the inner connector (4); characterized in that, The release device includes a middle ring (5) and an outer ring (8); The handle is connected to the outer ring (8) via a spring tube; The outer ring (8) is connected to the tightening tube (2) through the middle ring (5); The distal end of the spindle (9) passes through the outer ring (8), the middle ring (5) and the tightening tube (2) in sequence, and is connected to the inner connector (4); the outer ring (8) is provided with a limiting mechanism I that restricts the radial movement of the middle ring (5) to the distal end; The middle ring (5) is provided with a limiting mechanism II to restrict the radial movement of the inner connector (4) towards the proximal end; the middle ring (5) includes a front part (51) and a rear part (52); The front part (51) of the middle ring is fitted inside the tightening tube (2); the rear part (52) of the middle ring is fitted inside the outer ring (8); An outer ring (6) is provided on the outer side wall of the rear part (52) of the middle ring, and a protrusion is provided on the inner side wall of the distal end of the outer ring (8). The protrusion and the outer ring (6) constitute a limiting mechanism I. An inner ring (7) is provided on the inner side wall of the rear part (52) of the middle ring, and the inner ring (7) constitutes the limiting mechanism II.

2. A hemostatic clip with a split structure according to claim 1, characterized in that, The maximum force that can be withstood between the front part (51) and the rear part (52) of the middle ring is 30N.

3. A hemostatic clip with a split structure according to claim 1, characterized in that, The front part (51) of the middle ring is provided with a C-shaped opening; relative to the C-shaped opening, a V-shaped spring is provided at the rear part (52) of the middle ring; the opening of the V-shaped spring is inserted into the C-shaped opening.

4. A hemostatic clip with a split structure according to claim 1, characterized in that, The rear part (52) of the middle ring is provided with a C-shaped opening; relative to the C-shaped opening, a V-shaped spring is provided at the front part (51) of the middle ring; the opening of the V-shaped spring is inserted into the C-shaped opening.

5. A hemostatic clip with a split structure according to claim 1, characterized in that, The front part (51) of the middle ring is welded and fixed to the outer ring (6); the front part (51) of the middle ring is welded and fixed to the inner ring (7); the rear part (52) of the middle ring is welded and fixed to the tightening tube (2).

6. A hemostatic clip with a split structure according to claim 1, characterized in that, The tightening tube (2) is a cylindrical structure with a hollow center. Its far end is provided with a limiting mechanism Ⅲ that restricts the clip (1) from running out, and its near end is provided with a limiting mechanism Ⅳ that restricts the position of the clip (1) after it is clamped.

7. A hemostatic clip with a split structure according to claim 6, characterized in that, The limiting mechanism III consists of two limiting baffles (20) symmetrically arranged on the far end face of the tightening tube (2); the two limiting baffles (20) are bent inward respectively.

8. A hemostatic clip with a split structure according to claim 6, characterized in that, The limiting mechanism Ⅳ is a limiting hole provided on the proximal side wall of the tightening tube (2) relative to the barb.

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