Four-connecting-rod hemostatic clip

Abstract

The utility model discloses a four-connecting-rod hemostatic clip which comprises a fixed sleeve and a forceps head assembly partially located in the fixed sleeve. The tong head assembly comprises a limiting sleeve, two clamping pieces and two connecting pieces, the limiting sleeve is located in the fixing sleeve, the two clamping pieces are coaxially hinged to the fixing sleeve through fixing pins, the clamping pieces, the connecting pieces and the limiting sleeve are sequentially hinged, and the two clamping pieces and the two connecting pieces form a four-connecting-rod structure; a first limiting part is arranged at the far end of the fixed sleeve, and a second limiting part matched with the first limiting part is arranged on the limiting sleeve, so that the forceps head assembly and the fixed sleeve are relatively fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a four-link hemostatic clamp. Background Art

[0002] A hemostatic clip is a minimally invasive surgical instrument that is often used to stop bleeding from wounds in the patient's body, such as the digestive tract. The hemostatic clip can be delivered to the surgical site in the patient's body through the endoscopic clamp channel, and the clamping operation is performed outside the body to complete the hemostatic treatment. Usually, after hemostatic treatment with a hemostatic clip, the local tissue inflammation process forms a granuloma, which falls off on its own and is discharged from the body through the digestive tract. This makes the surgery have the advantages of less damage, fast hemostasis, low incidence of rebleeding, fewer complications, and definite efficacy.

[0003] There are many types of clamp head structures of hemostatic clamps, among which the four-link structure is more common. When the clamp head of the four-link hemostatic clamp in the prior art is opened, the four-link and the clamp head seat need to extend out of the fixed sleeve, and the clamp head extends a large distance, which is suitable for clamp head structures with short clips and small wound surface hemostasis. And when the clamp head structure is released, the clamp head seat connected to the four-link is tightened with the fixed sleeve to achieve the fixation of the two. After repeated use, the tightening force of the fixed sleeve will decrease, and the connection strength of the entire clamp head structure will weaken, which will easily cause the clamp head seat to separate from the fixed sleeve. Utility Model Content

[0004] In order to solve the technical problems that the four-link hemostatic clamp in the prior art needs to extend out of a fixed sleeve, the clamp head extends a large distance, is only suitable for hemostasis of wound surfaces with short clamps and small areas, and after long-term use, the connection strength of the clamp head structure is weakened, which easily leads to the separation of the clamp head seat and the fixed sleeve, the utility model provides a four-link hemostatic clamp to solve the above problems.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a four-bar hemostatic clamp, including a fixed sleeve and a clamp head assembly partially located in the fixed sleeve; the clamp head assembly includes a limiting sleeve, two clips and two connecting pieces, the limiting sleeve is located in the fixed sleeve, the two clips are coaxially hinged with the fixed sleeve through a fixing pin, the clips, the connecting piece and the limiting sleeve are hinged in sequence, so that the two clips and the two connecting pieces form a four-bar structure; the distal end of the fixed sleeve is provided with a first limiting portion, and the limiting sleeve has a second limiting portion cooperating with the first limiting portion, so that the clamp head assembly and the fixed sleeve are relatively fixed.

[0006] It also includes a connecting sleeve and a pull rod, the connecting sleeve has a third limiting portion that cooperates with the first limiting portion, the pull rod and the limiting sleeve are detachably connected; the third limiting portion is released from the first limiting portion after the pull rod is separated from the limiting sleeve.

[0007] Furthermore, the proximal end of the fixed sleeve is symmetrically provided with notches, and when the clamp head assembly is in an open state, the four-bar linkage structure extends laterally from the notch.

[0008] Furthermore, the clamping piece includes a clamping section and a connecting section, the proximal end of the connecting section is hinged to the fixing sleeve, and the distal end of the connecting section is hinged to the connecting piece.

[0009] Furthermore, the two connecting pieces are coaxially hinged with the limiting sleeve via a movable pin, and the pull rod is connected to the movable pin.

[0010] Furthermore, the first limiting portion is at least two wings bent inwardly from the side wall of the fixing sleeve, and the second limiting portion is a first slot for the wings to be inserted into.

[0011] Furthermore, the first limiting portion is at least two wings bent inwardly from the side wall of the fixing sleeve, and the third limiting portion is a second slot for the wings to be inserted into.

[0012] Furthermore, the first groove is an annular groove or an arc groove.

[0013] Furthermore, the second groove is an annular groove or an arc groove.

[0014] The beneficial effects of the utility model are:

[0015] (1) The four-bar hemostatic clip described in the utility model has a clip connected to a fixed sleeve by a fixed pin. The four-bar linkage formed at the distal end of the clip can only move within the fixed sleeve and does not need to extend out of the fixed sleeve. Therefore, the size of the clip can be lengthened and can be used to stop bleeding on a large wound surface.

[0016] (2) In the four-bar hemostatic clamp described in the present invention, the fixed sleeve and the clamp head assembly are not fixed by tensioning, but by the cooperation between the first limiting portion on the fixed sleeve and the second limiting portion on the limiting sleeve to achieve the fixation of the two. Fatigue loss will not occur, and the service life of the clamp head structure is longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is an exploded view of a specific implementation of the four-link hemostatic clamp described in the utility model;

[0019] Figure 2 It is a schematic diagram of the limit sleeve in the utility model;

[0020] Figure 3 It is a schematic diagram of a fixed sleeve in the utility model;

[0021] Figure 4It is a schematic diagram of the clamp head assembly of the utility model when it is in an open state;

[0022] Figure 5 It is a schematic diagram of the clamp head assembly of the utility model when it is in a closed state;

[0023] Figure 6 It is a schematic diagram of the clamp head assembly of the utility model when it is in a state of being released;

[0024] Figure 7 It is a schematic diagram of the clamp head assembly of the utility model when it is in a disengaged state.

[0025] In the figure, 1. fixed sleeve, 101. first limiting part, 102. first pin hole, 103. notch, 2. clamp head assembly, 201. limiting sleeve, 2011. second limiting part, 2012. second pin hole, 202. clamping piece, 2021. clamping section, 2022. connecting section, 203. connecting piece, 3. fixed pin, 4. movable pin, 5. connecting sleeve, 501. third limiting part, 6. pull rod, 601. C-shaped matching part. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] The utility model takes the end close to the patient as the proximal end and the end far away from the patient as the distal end.

[0028] A four-bar linkage hemostatic clamp comprises a fixed sleeve 1 and a clamp head assembly 2 partially located in the fixed sleeve 1; the clamp head assembly 2 comprises a limiting sleeve 201, two clips 202 and two connecting pieces 203, the limiting sleeve 201 is located in the fixed sleeve 1, the two clips 202 are coaxially hinged with the fixed sleeve 1 through a fixing pin 3, the clips 202, the connecting piece 203 and the limiting sleeve 201 are hinged in sequence, so that the two clips 202 and the two connecting pieces 203 form a four-bar linkage structure; a first limiting portion 101 is provided at the distal end of the fixed sleeve 1, and a second limiting portion 2011 cooperating with the first limiting portion 101 is provided on the limiting sleeve 201, so that the clamp head assembly 2 and the fixed sleeve 1 are relatively fixed.

[0029] like Figure 1-Figure 3As shown, the two clips 202 and the two connecting pieces 203 are symmetrically arranged relative to the central axis of the fixed sleeve 1, the proximal end of the clip 202 acts on the damaged tissue, the proximal ends of the clip 202 and the connecting pieces 203 are connected one by one, the distal ends of the two connecting pieces 203 are coaxially hinged with the proximal end of the limiting sleeve 201 through the movable pin 4, the movable pin 4 is installed in the second pin hole 2012 at the proximal end of the limiting sleeve 201, and the fixed pin 3 is installed in the first pin hole 102 at the proximal end of the fixed sleeve 1. Since the fixed pin 3 is axially fixed by the fixed sleeve 1, when the limiting sleeve 201 moves axially, the clip 202 cannot move axially and can only rotate around the fixed pin 3, so that the four-bar structure can be folded or opened. When the four-bar structure is folded, the angle between the connecting piece 203 and the clip 202 is reduced, and the two clips 202 are opened. When the four-bar structure is opened, the angle between the connecting piece 203 and the clip 202 is increased, and the two clips 202 are closed. During this process, restricted by the fixing pin 3, the four-bar structure composed of the clip 202 and the connecting piece 203 cannot extend axially out of the fixing sleeve 1. Only the portion of the clip 202 used to cover the damaged tissue is always located outside the fixing sleeve 1. Therefore, the clip 202 can be lengthened to facilitate clamping of a large area of ​​wound surface.

[0030] Furthermore, since the limiting sleeve 201 and the fixed sleeve 1 are axially limited only by the first limiting portion 101 and the second limiting portion 2011, before the first limiting portion 101 and the second limiting portion 2011 are not matched, the limiting sleeve 201 can move freely in the fixed sleeve 1, with small push-pull resistance and more labor-saving operation. The matching of the first limiting portion 101 and the second limiting portion 2011 is not easy to deform, and the service life is improved.

[0031] The clamping piece 202 includes a clamping section 2021 and a connecting section 2022. The proximal end of the connecting section 2022 is hinged to the fixed sleeve 1, and the distal end of the connecting section 2022 is hinged to the connecting piece 203. The clamping section 2021 and the connecting section 2022 are fixedly connected. The clamping section 2021 is used to clamp the damaged tissue, and the connecting section 2022 is used to form a four-bar structure with the connecting piece 203.

[0032] Since the four-bar linkage structure needs to be folded and opened, and the width dimension is larger when folded, the proximal diameter of the fixed sleeve 1 can be larger than the distal diameter. In other embodiments, the proximal end of the fixed sleeve 1 is symmetrically provided with notches 103. When the clamp head assembly 2 is in the open state, the four-bar linkage structure extends laterally from the notch 103. Figure 4 In the figure showing the hemostatic clip in the open state, the connecting piece 203 extends laterally out of the fixing sleeve 1 .

[0033] like Figure 2 and Figure 3As shown, the first limiting portion 101 is at least two wings bent inwardly from the side wall of the fixed sleeve 1, and the second limiting portion 2011 is a first slot for the wings to be inserted into. The wings have a certain elasticity, and under the action of external force, the wings can be inserted into or out of the first slot. The first slot can be an arc groove corresponding to the first limiting portion 101, or it can be an annular groove around the limiting sleeve 201. In other embodiments, the first limiting portion 101 and the second limiting portion 2011 can also be mutually matched sockets and hooks.

[0034] The four-bar hemostatic clamp generally includes a connecting sleeve 5 and a pull rod 6. The connecting sleeve 5 has a third limiting portion 501 that cooperates with the first limiting portion 101. The pull rod 6 is detachably connected to the limiting sleeve 201. The third limiting portion 501 is released from the first limiting portion 101 after the pull rod 6 is separated from the limiting sleeve 201. Figure 5 As shown, when the clamp head assembly 2 is not released, the connecting sleeve 5 is connected to the fixed sleeve 1 through the cooperation of the first limiting portion 101 and the third limiting portion 501, and the pull rod 6 is connected to the movable pin 4 through the elastic C-shaped matching portion 601. When the pull rod 6 is pulled toward the proximal end after the clamp head assembly 2 is closed, the C-shaped matching portion 601 expands and deforms and separates from the movable pin 4 (as shown in FIG. Figure 6 As shown in FIG. 1 ), the clamp head assembly 2 is released, and the pull rod 6 is continuously pulled toward the proximal end, the first limiting portion 101 is separated from the third limiting portion 501, and then the second limiting portion 2011 of the limiting sleeve 201 cooperates with the first limiting portion 101, and the entire clamp head structure can be disengaged (as shown in FIG. 1 ). Figure 7 as shown).

[0035] The same limiting portion cooperates with the connecting sleeve 5 and the limiting sleeve 201 at different stages, thereby simplifying the structure. When the first limiting portion 101 is at least two wings bent inwardly from the side wall of the fixing sleeve 1, the third limiting portion 501 can be a second slot for the wings to be inserted into, and similarly, the second slot can be an annular slot or an arcuate slot.

[0036] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A four-link hemostatic clip, characterized in that: It comprises a fixed sleeve (1), a connecting sleeve (5), a pull rod (6), and a clamp head assembly (2) partially located in the fixed sleeve (1); The pliers head assembly (2) comprises a limiting sleeve (201), two clips (202) and two connecting pieces (203); the limiting sleeve (201) is located in the fixed sleeve (1); the two clips (202) are coaxially hinged with the fixed sleeve (1) via a fixed pin (3); the clips (202), the connecting piece (203) and the limiting sleeve (201) are hinged in sequence, so that the two clips (202) and the two connecting pieces (203) form a four-bar connecting structure; The distal end of the fixed sleeve (1) is provided with a first limiting portion (101), and the limiting sleeve (201) is provided with a second limiting portion (2011) that cooperates with the first limiting portion (101), so that the pliers head assembly (2) and the fixed sleeve (1) are relatively fixed; The connecting sleeve (5) has a third limiting portion (501) that cooperates with the first limiting portion (101), and the pull rod (6) and the limiting sleeve (201) are detachably connected; the third limiting portion (501) is released from the first limiting portion (101) after the pull rod (6) is separated from the limiting sleeve (201).

2. The four-bar hemostatic clip according to claim 1, characterized in that: A notch (103) is symmetrically arranged at the proximal end of the fixed sleeve (1), and when the clamp head assembly (2) is in an open state, the four-bar linkage structure extends laterally from the notch (103).

3. The four-bar hemostatic clip according to claim 1, characterized in that: The clamping piece (202) comprises a clamping section (2021) and a connecting section (2022), wherein the proximal end of the connecting section (2022) is hinged to the fixing sleeve (1), and the distal end of the connecting section (2022) is hinged to the connecting piece (203).

4. The four-bar hemostatic clip according to claim 1, characterized in that: The two connecting pieces (203) are coaxially hinged with the limiting sleeve (201) via a movable pin (4), and the pull rod (6) is connected to the movable pin (4).

5. The four-bar hemostatic clip according to claim 1, characterized in that: The first limiting portion (101) is at least two wing portions bent inwardly from the side wall of the fixing sleeve (1), and the second limiting portion (2011) is a first slot for the wing portions to be inserted into.

6. The four-bar hemostatic clip according to claim 1, characterized in that: The first limiting portion (101) is at least two wing portions bent inwardly from the side wall of the fixing sleeve (1), and the third limiting portion (501) is a second slot for the wing portions to be inserted into.

7. The four-bar hemostatic clip according to claim 5, characterized in that: The first clamping groove is an annular groove or an arc groove.

8. The four-bar hemostatic clip according to claim 6, characterized in that: The second clamping groove is an annular groove or an arc groove.

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