Hemostatic clip

Abstract

The utility model provides a hemostatic clamp relates to medical instrument technical field, including handle assembly, sleeve assembly and clamping assembly, sleeve assembly includes the outer tube and the pull cable who sets in the outer tube, clamping assembly includes sleeve and clip subassembly, the clip subassembly includes the clamping piece of integrated moulding, the proximal end of clip subassembly forms and exits the passageway, the distal end of pull cable is configured as can along exit passageway movement and then with clip subassembly completes separation, exit passageway extends along the longitudinal axis direction of sleeve, in the process that pull cable moves along exit passageway until with clip subassembly separates, pull cable forces the proximal end of clip subassembly to deform, the proximal end of clip subassembly then with sleeve opposite fixed connection, and this releasable connection mode effectively increases the opening amplitude of clip and reduces the production manufacturing cost of hemostatic clamp.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a hemostatic clip. Background Technology

[0002] With the development of endoscopic minimally invasive technology, the hemostasis and perforation closure after endoscopic minimally invasive surgery are now mostly achieved by using hemostatic clips in clinical practice. Hemostatic clips use the principle of mechanical compression to clamp the mucosal layer of the tissue to achieve closure. After the clip is released, it remains in the body. After the wound tissue has repaired itself, the clamped part of the tissue dies and falls off due to the clamping force. The clip is excreted from the body through the digestive tract along with the detached tissue.

[0003] However, traditional hemostatic clips, such as the hemostatic clip disclosed in patent application number 201520317758.8, include two clips in the clip assembly. The two clips are fixed by a pin, and the pull rod is engaged with the pin. That is, the distal end of the pull rod is located between the two clips. This causes the end of the pull rod to prematurely abut against the baffle set at the distal end of the sleeve when the clip assembly is pushed to open the clip, thus limiting the opening range of the clip. At the same time, the hemostatic clip is also equipped with a clip retainer, which further limits the opening range of the clip. Moreover, this structure results in a higher manufacturing cost for the hemostatic clip. Utility Model Content

[0004] The present invention discloses a hemostatic clip that solves the problem that the traditional hemostatic clip has two clips fixed by a pin, and the structure of the pull rod engaging with the pin limits the opening range of the clip and increases the manufacturing cost. The invention effectively increases the opening range of the clip and effectively reduces the manufacturing cost of the hemostatic clip.

[0005] To achieve the above objectives, the technical solution of this utility model is specifically implemented as follows:

[0006] This utility model discloses a hemostatic clip, including a handle assembly, a cannula assembly, and a clamping assembly. The cannula assembly includes an outer tube and a pull cable passing through the outer tube. The clamping assembly includes a sleeve and a clamp assembly. The clamp assembly includes an integrally formed clamp piece. The proximal end of the clamp assembly forms a release path. The distal end of the pull cable is configured to move along the release path and thus separate from the clamp assembly. The release path extends along the longitudinal axis of the sleeve. During the process of the pull cable moving along the release path until it separates from the clamp assembly, the pull cable forces the proximal end of the clamp assembly to deform, and the proximal end of the clamp assembly is then fixedly connected to the sleeve.

[0007] Furthermore, the cable includes a proximal end, a pull rod fixedly connected to the proximal end, and a connector. The distal end of the pull rod is U-shaped and includes a first connecting arm and a second connecting arm. The clamp assembly is fixedly connected to the first connecting arm and the second connecting arm of the pull rod through the connector, thus completing the connection between the cable and the clamp assembly. When the connector is pulled by the cable, it disengages from the exit path, thus completing the separation between the cable and the clamp assembly.

[0008] Furthermore, the near end of the clip has a locking hole and a gap that are positioned opposite each other. The extension direction of the gap is the same as the overall extension direction of the clip. The locking hole on the clip is connected to the gap to form the exit passage.

[0009] Furthermore, a baffle is provided at the distal end of the sleeve. The baffle includes a first curved surface segment, a second curved surface segment, a third curved surface segment, and a fourth curved surface segment. The first curved surface segment and the second curved surface segment abut against the inner sidewall of the sleeve, and the third curved surface segment and the fourth curved surface segment respectively form a clamping and limiting hole with the inner sidewall of the sleeve.

[0010] Furthermore, the third curved surface segment and the fourth curved surface segment are arc-shaped segments that bulge towards the inner wall of the sleeve.

[0011] Furthermore, a protrusion is provided on the end face of the baffle facing the proximal end.

[0012] Furthermore, the proximal end of the sleeve is provided with a square locking hole that is symmetrical about its radial direction.

[0013] Furthermore, locking wings are formed on both sides of the clamp facing the sleeve, and the locking wings cooperate with the square locking holes to complete the fixed connection of the clamp assembly relative to the sleeve.

[0014] Furthermore, the locking wing is disposed on the extension path of the exit passage.

[0015] Furthermore, the sleeve assembly also includes a connecting shaft and a transition joint, the proximal end of the sleeve being detachably connected to the distal end of the connecting shaft, the distal end of the outer tube being fixedly connected to the distal end of the transition joint, and the proximal end of the connecting shaft abutting against the proximal end of the transition joint.

[0016] Beneficial technical effects:

[0017] 1. This utility model discloses a hemostatic clip, including a handle assembly, a sleeve assembly, and a clamping assembly. The sleeve assembly includes an outer tube and a pull cable passing through the outer tube. The clamping assembly includes a sleeve and a clamp assembly. The clamp assembly includes an integrally formed clamp piece. The proximal end of the clamp assembly forms a release passage. The distal end of the pull cable is configured to move along the release passage and thus separate from the clamp assembly. The release passage extends along the longitudinal axis of the sleeve. During the process of the pull cable moving along the release passage until it separates from the clamp assembly, the pull cable forces the proximal end of the clamp assembly to deform, and the proximal end of the clamp assembly is then fixedly connected to the sleeve. This releasable connection method effectively increases the opening range of the clamp and reduces the manufacturing cost of the hemostatic clip.

[0018] 2. In this utility model, the baffle located at the far end of the sleeve includes a first curved surface segment, a second curved surface segment, a third curved surface segment, and a fourth curved surface segment. The first and second curved surface segments abut against the inner wall of the sleeve. The third and fourth curved surface segments respectively form clamping limit holes with the inner wall of the sleeve. The third and fourth curved surface segments are arc-shaped segments protruding towards the inner wall of the sleeve. The arc-shaped segments protruding to both sides provide a supporting force away from each other to the clamping segments, which helps to increase the opening range of the clamp.

[0019] 3. In this utility model, a protrusion is provided on the end face of the baffle located at the far end of the sleeve facing the near end. During the opening of the clamp, the protrusion provides a supporting force to the clamp to move away from each other, which helps to increase the opening range of the clamp.

[0020] 4. In this utility model, a square locking hole is provided at the near end of the sleeve, which is symmetrical about its radial direction. The square locking hole is more conducive to the locking wing hook of the clamp.

[0021] 5. In this utility model, locking wings are formed on both sides of the clamp facing the sleeve, that is, the one-piece clamp has two locking wings on both sides facing the sleeve, which enhances the stability of the clamp locking relative to the sleeve. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0023] Figure 1 This is a three-dimensional structural diagram of the distal portion of a hemostatic clip according to the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of the clip assembly in the hemostatic clip of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the pull rod in the hemostatic clip of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the baffle in a hemostatic clip according to the present invention;

[0027] Figure 5 This is a partial structural diagram of the cooperation between the baffle and the clip assembly in a hemostatic clip according to the present invention;

[0028] Figure 6 This is a top view schematic diagram of the cooperation between the baffle and the clip assembly in a hemostatic clip according to the present invention;

[0029] Figure 7 This is a schematic diagram of another structure of the baffle in the hemostatic clip of this utility model;

[0030] Figure 8 This is a schematic diagram of the structure of a hemostatic clip in the open state according to this utility model;

[0031] Figure 9 This is a schematic diagram of the structure of the hemostatic clip in the closed state according to the present invention.

[0032] Among them, 12-cable, 121-pull rod, 1211-first connecting arm, 1212-second connecting arm, 1213-connecting hole, 122-connector, 21-sleeve, 211-square locking hole, 212-clamping tooth, 22-clamp assembly, 221-locking hole, 222-gap, 223-locking wing, 23-baffle, 231-first curved section, 232-second curved section, 233-third curved section, 234-fourth curved section, 235-protrusion, 3-connecting tube, 4-connecting shaft, 5-transition joint. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a predetermined orientation or be constructed and operated in a predetermined orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0036] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0037] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0038] It should be noted that, in this embodiment, those skilled in the art will understand that when using a hemostatic clip for surgical procedures, the front end of the hemostatic clip contacts the patient, while the rear end (handle assembly) is operated by the operator. For ease of description, the end of each component of the hemostatic clip that is closer to the front end of the hemostatic clip is referred to as the distal end, and the end of each component that is closer to the rear end of the hemostatic clip is referred to as the proximal end.

[0039] See Figure 1 This utility model discloses a hemostatic clip, including a handle assembly, a sleeve assembly, and a clamping assembly. The handle assembly (not shown) controls the opening and closing of the terminal clamp of the hemostatic clip by pulling a cable 12. The specific structure of the handle assembly is a previously disclosed structure that can realize the opening and closing of the clamp, and the specific structure of the handle assembly will not be described in detail here. The sleeve assembly includes an outer tube and a cable 12 inserted in the outer tube. Preferably, the cable 12 includes a proximal end, a pull rod 121 fixedly connected to the proximal end, and a connector 122. The proximal end is fixedly connected to the handle assembly, and the pull rod 121 is fixedly connected to the proximal end. It can be understood that, in order to improve the connection strength between the proximal end and the pull rod 121, a connecting tube 3 is also provided in the sleeve assembly. The pull rod 121 is fixedly connected to the connecting tube 3, and the distal end of the proximal end is also fixedly connected to the connecting tube 3. The clamping assembly includes a sleeve 21 and a clamping assembly 22. A baffle 23 is provided at the distal end of the sleeve 21.

[0040] The clip assembly 22 in this utility model, see [reference needed]. Figure 2Specifically, the clamp assembly 22 includes an integrally formed clamp piece, including a first clamp arm and a second clamp arm. The first clamp arm and the second clamp arm are integrally formed. The proximal ends of the first clamp arm and the second clamp arm are formed with locking holes 221 and gaps 222. The locking holes 221 formed on the first clamp arm and the second clamp arm are positioned opposite each other (coaxially arranged). The extension direction of the gaps 222 formed on the first clamp arm and the second clamp arm is the same as the overall extension direction of the clamp piece. The locking holes 221 and the gaps 222 on the first clamp arm are connected. The locking holes 221 and the gaps 222 on the second clamp arm are also connected. That is, an exit passage for the connector 122 to exit is formed at the proximal end of the clamp assembly 22.

[0041] The pull rod 121 in this utility model, see [reference] Figure 3 Specifically, the distal end of the pull rod 121 has a U-shaped overall structure, including a first connecting arm 1211 and a second connecting arm 1212. The first connecting arm 1211 has a connecting hole 1213, and the second connecting arm 1212 also has a connecting hole 1213. The connecting holes 1213 of the first and second connecting arms 1211 and 1212 are positioned opposite each other (coaxially arranged). The clamp assembly 22 is fixedly connected to the pull rod 121 via a connector 122. Specifically, the connector 122 passes sequentially through the first clamp arm... The locking holes 221 on the first and second clamping arms are respectively welded and fixed to the first connecting arm 1211 and the second connecting arm 1212 of the pull rod 121, thus completing the connection between the pull cable 12 and the clamp assembly 22. After the clamping operation of the clamp assembly is completed, the connector 121 is disengaged from the exit passage formed by the gap 222 between the first and second clamping arms under the pull of the pull cable 12, thus completing the separation of the pull cable 12 from the clamp assembly 22. Preferably, the connector 122 is selected as a pin.

[0042] As an embodiment of this utility model, the baffle 23 located at the distal end of the sleeve 21 is shown in the figure. Figure 4-6 Specifically, the baffle 23 includes a first curved surface segment 231, a second curved surface segment 232, a third curved surface segment 233, and a fourth curved surface segment 234. The first curved surface segment 231 and the second curved surface segment 232 abut against the inner wall of the sleeve 21. The third curved surface segment 233 and the fourth curved surface segment 234 respectively form clamping limit holes with the inner wall of the sleeve 21. The first clamping arm and the second clamping arm extend out through the corresponding limit holes. Preferably, the third curved surface segment 233 and the fourth curved surface segment 234 are arc-shaped segments protruding towards the inner wall of the sleeve 21. During the opening process of the clamp assembly 22, the protruding arc-shaped segments provide a supporting force away from each other to the first clamping arm and the second clamping arm, further increasing the opening range of the clamp.

[0043] In another embodiment of this utility model, the structure of the baffle 23 can also be such that a protrusion 235 is provided on the end face facing the proximal end, see [reference]. Figure 7 The protrusion 235 can also provide support to the first and second clamping arms away from each other, further increasing the opening range and opening stability of the clamps.

[0044] As an embodiment of this utility model, the proximal end of the sleeve 21 is provided with a square locking hole 211 that is symmetrical about its radial direction. The first clamping arm and the second clamping arm are both formed with locking wings 223 on both sides facing the sleeve 21. The locking wings 223 cooperate with the square locking hole 211 to complete the locking of the clamp assembly 22 relative to the sleeve 21. The clamping piece has two locking wings 223 on both sides facing the sleeve 21, which enhances the stability of the locking of the clamp assembly 22 relative to the sleeve 21. The square locking hole 211 is more conducive to the hooking of the locking wings 223. It should be noted that the locking wings 223 are set on the extension path of the exit passage. When the connector 122 passes through the exit passage, it provides a force that causes the locking wings 223 on both sides to move in opposite directions (i.e., the proximal end of the clamping piece deforms), so that the locking wings 223 hook onto the square locking hole 211.

[0045] As an embodiment of this utility model, the sleeve assembly further includes a connecting shaft 4 and a transition joint 5. The proximal end of the sleeve 21 is detachably connected to the distal end of the connecting shaft 4. Specifically, the distal end of the connecting shaft 4 has a fixing groove formed along its outer circumferential surface, and the proximal end of the sleeve 21 has a deformable, inwardly bent snap-fit ​​tooth 212, which snaps into the fixing groove. The distal end of the transition joint 5 is fixedly connected to the distal end of the outer tube, and the proximal end of the connecting shaft 4 abuts against the proximal end of the transition joint 5. The transition joint 5 is provided so that the connecting shaft 4 cannot move to the distal end, but can only move to the proximal end.

[0046] The specific working process of the hemostatic clip disclosed in this utility model is as follows:

[0047] Operating the handle assembly causes the proximal end of the cable 12 to move from proximal to distal. This movement pushes the lever 121 to also move from proximal to distal, which in turn pushes the clamp assembly 22 to extend out of the sleeve 21. The first and second clamping arms open to a certain extent. The baffle 23 provides a supporting force away from the clamping arms, which helps to increase the opening range of the clamps. (See [reference]) Figure 8When the wound requiring clamping is within the clamping range of the clamp assembly 22, the handle assembly is operated, causing the proximal end of the pull cable 12 to move from the distal end to the proximal end. This movement of the proximal end pulls the push rod 121 from the distal end to the proximal end as well. The movement of the pull rod 121 from the distal end to the proximal end causes the first and second clamping arms in the clamp assembly 22 to move towards each other, clamping the wound. Continuing to pull the pull cable 12 proximally, since the locking wing 223 is positioned on the extension path of the exit passage, when the connector 122 exits from the gap 222 (exit passage) of the clamp assembly 22... During the disengagement process, the connector 122 provides a force that causes the locking wings 223 on both sides to move in opposite directions (i.e., the proximal end of the clamping plate deforms), causing the locking wings 223 to hook onto the square locking holes 211 on the sleeve 21. This completes the locking of the clamping assembly 22 and the sleeve 21 during the separation of the cable 12 and the clamping assembly 22. Continuing to pull the cable 12 proximally causes the connecting shaft 4 to move proximally. During this movement, the deformable, inwardly bent locking teeth 212 at the proximal end of the sleeve 21 return to their straight position. (See [reference]). Figure 9 This allows the clamping component to separate from other parts, thus releasing the hemostatic clamp.

[0048] The hemostatic clip disclosed in this utility model includes an integrally formed clip piece. The proximal end of the clip assembly has a release passage. The distal end of the cable is configured to move along the release passage and thus separate from the clip assembly. The release passage extends along the longitudinal axis of the sleeve. During the process of the cable moving along the release passage until it separates from the clip assembly, the cable forces the proximal end of the clip assembly to deform, and the proximal end of the clip assembly is then fixedly connected to the sleeve. This releasable connection method effectively increases the opening range of the clip and reduces the manufacturing cost of the hemostatic clip.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The above embodiments are merely descriptions of preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A hemostatic clip, comprising a handle assembly, a cannula assembly, and a clamping assembly, wherein the cannula assembly includes an outer tube and a pull cable (12) passing through the outer tube, and the clamping assembly includes a sleeve (21) and a clamp assembly (22), characterized in that, The clamp assembly (22) includes an integrally formed clamp piece. The proximal end of the clamp assembly (22) forms an exit passage that extends along the longitudinal axis of the sleeve (21). The distal end of the cable (12) is configured to move along the exit passage and thus separate from the clamp assembly (22). During the process of the cable (12) moving along the exit passage until it separates from the clamp assembly (22), the cable (12) forces the proximal end of the clamp assembly (22) to deform, and the proximal end of the clamp assembly (22) is then fixedly connected to the sleeve (21).

2. The hemostatic clip according to claim 1, characterized in that, The cable (12) includes a proximal end, a pull rod (121) fixedly connected to the proximal end, and a connector (122). The distal end of the pull rod (121) is U-shaped and includes a first connecting arm (1211) and a second connecting arm (1212). The clamp assembly (22) is fixedly connected to the first connecting arm (1211) and the second connecting arm (1212) of the pull rod (121) through the connector (122), thus completing the connection between the cable (12) and the clamp assembly (22). When the connector (122) is pulled out of the exit path by the cable (12), the cable (12) is separated from the clamp assembly (22).

3. A hemostatic clip according to claim 1, characterized in that, The near end of the clip has a locking hole (221) and a gap (222) that are positioned opposite each other. The extension direction of the gap (222) is the same as the overall extension direction of the clip. The locking hole (221) and the gap (222) on the clip are connected to form the exit passage.

4. A hemostatic clip according to claim 1, characterized in that, The sleeve (21) is provided with a baffle (23) at its far end. The baffle (23) includes a first curved surface segment (231), a second curved surface segment (232), a third curved surface segment (233), and a fourth curved surface segment (234). The first curved surface segment (231) and the second curved surface segment (232) abut against the inner wall of the sleeve (21). The third curved surface segment (233) and the fourth curved surface segment (234) respectively form a clamping and limiting hole with the inner wall of the sleeve (21).

5. A hemostatic clip according to claim 4, characterized in that, The third curved surface segment (233) and the fourth curved surface segment (234) are arc-shaped segments that protrude toward the inner wall of the sleeve (21).

6. A hemostatic clip according to claim 1, characterized in that, The baffle (23) has a protrusion (235) on its end face facing the near end.

7. A hemostatic clip according to claim 1, characterized in that, The sleeve (21) has a square locking hole (211) that is symmetrical about its radial direction at its near end.

8. A hemostatic clip according to claim 7, characterized in that, Locking wings (223) are formed on both sides of the clamp facing the sleeve (21). The locking wings (223) cooperate with the square locking hole (211) to complete the fixed connection of the clamp assembly (22) relative to the sleeve (21).

9. A hemostatic clip according to claim 8, characterized in that, The locking wing (223) is disposed on the extension path of the exit passage.

10. A hemostatic clip according to claim 1, characterized in that, The sleeve assembly further includes a connecting shaft (4) and a transition joint (5), the proximal end of the sleeve (21) is detachably connected to the distal end of the connecting shaft (4), the distal end of the outer tube is fixedly connected to the distal end of the transition joint (5), and the proximal end of the connecting shaft (4) abuts against the proximal end of the transition joint (5).

Images