CN219089487U - Ligature clamp - Google Patents

Abstract

A ligating clip comprising a first jaw member, a second jaw member and a hinged portion, the first jaw member being configured to be resiliently pivotable relative to the second jaw member about the hinged portion to switch the ligating clip between a clamped position, the first jaw member having a first clamping surface, and an open position, the second jaw member having a second clamping surface opposite the first clamping surface, the first clamping surface being proximate the second clamping surface, the open position being remote from the second clamping surface, characterised in that the ligating clip is in a clamped position in an unused condition and in an open position generates a spring force tending to return to the clamped position.

Description

Ligature clamp

Technical Field

The present disclosure relates to a ligating clip.

Background

Ligating clips are widely used in the surgical field, and are commonly used in the field of minimally invasive surgery to ligate tissue to block blood flow. Ligating clips advantageously reduce surgical time and should meet the requirements of safety, reliability, small size, and low cost. In addition, the ligating clip should provide a firm, secure, and durable grip and withstand the applied forces to avoid sliding along the tissue.

Existing ligating clips, particularly those made of polymeric materials, generally comprise the following structure: a pair of jaw members coupled to each other by a hinge portion, pivotable between an open position and a clamped position, for clamping tissue between the jaw members in the clamped position; a hinge portion located proximal to the pair of jaw members for pivotally hinging the jaw members; and a locking portion distal to the pair of jaw members for locking the ligation clip in a clamped position to clamp tissue.

In the initial state, a pair of jaw members of the existing ligating clip are in an open position. When it is desired to ligate tissue with the ligating clip, the ligating clip is placed around the tissue, a clamping force is applied to the jaw members of the ligating clip with the clip applier such that the jaw members elastically deform and pivot about the hinge portion from the open position to the clamped position, and the ligating clip is locked in the clamped position with the locking portion to clamp the tissue for hemostasis.

In the existing ligature clips, in addition to the pressure of the clamped tissue, the ligature clip is subjected to elastic restoring forces in the clamped position, both of which tend to move the ligature clip toward the open position, which results in stress or strain in the hinge portion, thereby increasing the risk of the ligature clip becoming detached or ruptured.

Disclosure of Invention

To overcome the above drawbacks, according to a first aspect of the present disclosure, there is provided a ligation clip comprising a first jaw member, a second jaw member and a hinge portion, the first jaw member being configured to be elastically pivotable relative to the second jaw member about the hinge portion to switch the ligation clip between a clamped position, the first jaw member having a first clamping surface, and an open position, the second jaw member having a second clamping surface opposite the first clamping surface, the first clamping surface being proximate to the second clamping surface, the open position being remote from the second clamping surface, characterized in that the ligation clip is in a clamped position in an unused state and in that an elastic force tending to return to the clamped position is generated in the open position.

Preferably, the hinge portion is arcuate.

Preferably, the first clamping surface has a first tooth formed thereon and the second clamping surface has a second tooth formed thereon, the first and second teeth being offset from each other in a direction perpendicular to the longitudinal direction of the ligating clip in the clamped position.

Preferably, the first tooth portion and the second tooth portion are formed in plurality.

Preferably, the first clamping surface is formed with a row of first teeth, the second clamping surface is formed with two rows of second teeth, the first teeth are positioned at the center of the first clamping surface in the direction perpendicular to the longitudinal direction of the ligating clip, and the second teeth are positioned at two sides of the second clamping surface.

Preferably, the first tooth and/or the second tooth have an abutment surface configured to abut tissue clamped by the ligating clip when the ligating clip is in a clamped position to prevent movement of tissue.

Preferably, the first jaw member includes a hook at a distal portion and the second jaw member includes a boss at a distal portion, the hook being configured to engage the boss to retain the ligation clip in a clamped position.

Preferably, the first jaw member further comprises a boss on the distal portion, the boss of the first jaw member and the boss of the second jaw member being engageable with a slot of a clip applier.

Drawings

Embodiments of the present disclosure will now be described, by way of illustration and not limitation, with reference to the accompanying exemplary drawings, in which:

fig. 1 is a perspective view of a ligating clip according to the present disclosure in a clamped position;

FIG. 2 is a perspective view of the ligating clip of FIG. 1 in an open position;

FIG. 3 is an enlarged partial perspective view of the ligating clip of FIG. 2;

fig. 4 is a partial cross-sectional schematic view of the tooth portion of the ligating clip of fig. 1 in a clamped position.

Detailed Description

The present disclosure will be described below with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. It should be understood, however, that the present disclosure may be presented in many different ways and is not limited to the embodiments described below; indeed, the embodiments described below are intended to more fully convey the disclosure to those skilled in the art and to fully convey the scope of the disclosure.

In the specification, spatial relationship words such as "upper", "lower", "left", "right", "front", "rear", "high", "low", and the like may describe the relationship of one feature to another feature in the drawings. It will be understood that the spatial relationship words comprise, in addition to the orientations shown in the figures, different orientations of the device in use or operation. For example, when the device in the figures is inverted, features that were originally described as "below" other features may be described as "above" the other features. The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the relative spatial relationship will be explained accordingly.

Various aspects of the disclosure will be described in detail with reference to the drawings, wherein like reference numerals designate identical or corresponding elements in each of the views. In addition, the term "proximal" or "posterior" refers to the portion of the structure that is closer to the clinician, while the term "distal" or "anterior" refers to the portion of the structure that is farther from the clinician. As is commonly known, the term "clinician" refers to a doctor (e.g., a surgeon), a nurse, or any other care provider, and may include support personnel.

In the following description, well-known functions or constructions are not described in detail to avoid obscuring the disclosure in unnecessary detail.

The ligating clip according to the present disclosure is described below with reference to fig. 1 to 4.

Referring to fig. 1 and 2, a ligating clip 100 according to the present disclosure includes a first jaw member 1, a second jaw member 2, and a hinge portion 3. The first jaw member 1 is pivotable relative to the second jaw member 2 about the hinge portion 3 to transition the ligating clip 100 between a clamped position (fig. 1) and an open position (fig. 2). In an initial state (an unused state), the ligation clip 100 is in a clamped position, with the first jaw member 1 and the second jaw member 2 defining a longitudinal axis L (fig. 1). In the embodiment, the first jaw member 1 and the second jaw member 2 are curved along the longitudinal axis L, but other jaw configurations are contemplated. For example, the first jaw member 1 and the second jaw member 2 may be in a straight line shape. In an embodiment, the articulating portion 3 is a living articulating portion integrally formed with proximal portions of the first jaw member 1 and the second jaw member 2. Preferably, the articulating portion 3 is formed in a circular arc shape to reduce the force required by the clip applier to open and close the ligating clip 100. The hinge portion 3 has a sufficient thickness to avoid breakage of the material there.

The first jaw member 1 has a proximal portion 11 and a distal portion 12. The second jaw member 2 has a proximal portion 21 and a distal portion 22. The distal portion 12 of the first jaw member 1 has a first boss 15 and a hook 16. The tip of the hook 16 extends proximally. The distal portion 22 of the second jaw member 2 has a second boss 25. When ligating tissue using ligating clip 100, a clip applier (not shown) provided with a slot can engage first boss 15 and second boss 25 to apply a force to first boss 15 and second boss 25 that opens ligating clip 100. The distal end of the second boss 25 is engageable with the hook 16 to retain the ligating clip 100 in the clamped position when the ligating clip 100 is in the clamped position.

The ligating clip 100 is in a clamped position in an initial state (unused state) when the ligating clip 100 is moved by the clip applier to an open position and then from the open position to a clamped position to clamp tissue, the resulting elastic restoring force tends to return the ligating clip 100 to the clamped position, whereupon the stress or strain generated in the ligating clip helps the ligating clip 100 to further clamp the tissue 200 to prevent the release of the tissue 200. Moreover, the stress is obviously smaller than that of the prior art, and the fatigue life of the ligature clamp is prolonged.

In this embodiment, the ligating clip 100 is integrally formed of an elastically deformable material (particularly a polymer or a metal having a large elongation) so as to be capable of elastically pivoting between an open position and a clamped position. Alternatively, the ligating clip 100 may be assembled from individual components, for example, the first and second bosses 15, 25 may be assembled on the first and second jaw members 1, 2, respectively, which are made of an elastically deformable material, wherein the first and second bosses 15, 25 are made of the same or different material as the first and second jaw members 1, 2.

Referring to fig. 2, the first jaw member 1 and the second jaw member 2 have opposing first and second clamping surfaces 13, 23, respectively. The first and second clamping surfaces 13, 23 have a plurality of first and second teeth 14, 24, respectively, the first and second teeth 14, 24 acting as tissue retaining members configured to prevent the ligating clip 100 from sliding along tissue when the ligating clip 100 is in a clamped position about tissue. In the embodiment shown in fig. 2, the first plurality of teeth 14 of the first jaw member 1 comprises a row of teeth and the second plurality of teeth 24 of the second jaw member 2 comprises two rows of teeth. Alternatively, the number of rows of teeth is not limited to the present embodiment, but may be arbitrarily selected as needed, for example, the first tooth portion 14 may include two rows of teeth, and the second tooth portion 24 may include three rows of teeth.

For convenience of description, an XYZ coordinate system is illustrated in fig. 2 to 4. In the XYZ coordinate system, the X direction is the direction of extension of the longitudinal axis L of the ligating clip 100, the Y direction is in the same horizontal plane as the X direction, in this embodiment perpendicular to the X direction, generally aligned with the longitudinal direction of the tissue to be gripped by the ligating clip 100, and the Z direction is generally perpendicular to the X direction and the Y direction. As shown in fig. 2 to 4, the first tooth portion 14 is located at the center of the first clamping surface 13 in the Y direction, and the second tooth portions 24 are located on both sides of the second clamping surface 23. The teeth of the first tooth portion 14 and the two rows of teeth of the second tooth portion 24 are offset from each other along the Y-direction such that when the ligating clip 100 is in the clamped position, the teeth of the first tooth portion 14 and the teeth of the second tooth portion 24 do not interfere with each other, but rather cooperate to clamp tissue 200 (fig. 4) to prevent movement of the ligating clip in the X-and Y-directions.

As shown in fig. 3 and 4, each of the first tooth portions 14 is formed in a substantially trapezoidal shape in a YZ plane perpendicular to the X-direction when the ligation clip is in the clamping position, each of the first tooth portions 14 includes an upper surface contacting the first clamping surface 13, a lower surface opposite to the upper surface in the Z-direction, and first, second, third and fourth side surfaces 141, 142, 143 and 144. When the ligating clip is in the clamped position, the first side 141 is opposite the second side 142 and spaced apart in the X-direction, and the third side 143 is opposite the fourth side 144 and spaced apart in the Y-direction. The first and second sides 141 and 142 are inclined with respect to the YZ plane, and the third and fourth sides 143 and 144 are inclined with respect to the XZ plane.

As shown in fig. 3 and 4, each of the second teeth 24 is formed in a substantially trapezoidal shape in a YZ plane perpendicular to the X-direction when the ligation clip is in the clamping position, each of the second teeth 24 includes a lower surface in contact with the second clamping surface 23, an upper surface opposite to the lower surface in the Z-direction, and first, second, third and fourth sides 241, 242, 243 and 244. When the ligating clip is in the clamped position, the first side 241 is opposite the second side 242 and spaced apart in the X-direction, and the third side 243 is opposite the fourth side 244 and spaced apart in the Y-direction. The third side 243 is a surface of the second tooth 24 facing the inside of the ligating clip in the Y direction, and the fourth side 244 is a surface of the second tooth 24 facing the outside of the ligating clip in the Y direction. The first side 241 and the second side 242 are inclined with respect to the YZ plane, and the third side 243 is inclined with respect to the XZ plane, and the fourth side 244 is parallel to the XZ plane and flush with the side of the second jaw member 2 in the Y direction, as shown in fig. 2 and 3.

As shown in fig. 4, when the tissue 200 is clamped by the ligating clip 100, the ligating clip 100 is held in the clamped position by the elastic restoring force of the ligating clip 100 and the engagement of the hook 16 with the second boss 25, the lower surface of the first tooth portion 14 and the upper surface of the second tooth portion 24 abut against the tissue 200, preventing the tissue 200 from moving in the Z direction. At the same time, the first side 141 and the second side 142 of the first tooth 14 abut against the tissue 200, and the first side 241 and the second side 242 of the second tooth 24 abut against the tissue 200, preventing the tissue 200 from moving in the X direction. The third side surface 143 and the fourth side surface 144 of the first tooth portion 14 abut the tissue 200, and the third side surface 243 of the second tooth portion 24 abuts the tissue 200, preventing the tissue 200 from moving in the Y direction. Thus, the tissue 200 is reliably clamped between the first clamping surface 13 and the second clamping surface 23 without sliding in all directions.

The following describes a method of using the ligating clip 100 of the present embodiment.

In the initial state shown in fig. 1, the ligating clip 100 is in a clamped position with the hook 16 engaged with the second boss 25. When the ligating clip 100 is to be used to clamp tissue, the user engages the clip applier slot with the first and second bosses 15, 25, respectively, of the ligating clip 100 and applies opposing forces to the first and second bosses 15, 25, respectively, to place the ligating clip 100 in the open position shown in fig. 2 and around the tissue 200 to be clamped. The user then gradually releases the aforementioned force of the clip applier so that the ligating clip 100 moves from the open position to the clamped position by its own elastic restoring force. When the ligating clip 100 is moved to the clamping position, the hook 16 again engages the second boss 25, and the tissue 200 is clamped between the first clamping surface 13 and the second clamping surface 23. At this time, the movement of the tissue in each direction is prevented by the lower surfaces and inclined side surfaces 141, 142, 143, 144 of the plurality of first tooth portions 14 and the upper surfaces and inclined side surfaces 241, 242, 243 of the plurality of second tooth portions 24.

The foregoing lists embodiments of the present disclosure, which do not limit the scope of the present disclosure, and those skilled in the art will recognize alternative embodiments in light of the teachings of the present disclosure.

For example, although the first tooth portion 14 and the second tooth portion 24 are each in a trapezoidal shape in the above embodiment, the present disclosure is not limited thereto. For example, the first tooth 14 and the second tooth 24 may take other polygonal shapes or curved shapes, as long as the first tooth 14 and the second tooth 24 have respective abutment surfaces to prevent the tissue 200 from moving in various directions, and the number of abutment surfaces is not limited.

For example, while the hooks 16 are provided on the distal portion 12 of the first jaw hook piece 1, the hooks 16 are not required. In the case where the elastic restoring force of the ligating clip 100 is sufficient, the hook 16 may not be provided.

Those skilled in the art will appreciate that various changes and modifications can be made to the exemplary embodiments of the disclosure without departing substantially from the spirit and scope thereof. Accordingly, all changes and modifications are intended to be included within the scope of the present disclosure as defined by the appended claims. The disclosure is defined by the following claims, with equivalents of the claims to be included therein.

Claims (8)

1. A ligating clip comprising a first jaw member, a second jaw member and a hinged portion, the first jaw member being configured to be resiliently pivotable relative to the second jaw member about the hinged portion to switch the ligating clip between a clamped position, the first jaw member having a first clamping surface, and an open position, the second jaw member having a second clamping surface opposite the first clamping surface, the first clamping surface being proximate the second clamping surface, the open position being remote from the second clamping surface, wherein the ligating clip is in a clamped position in an unused condition and the ligating clip is in an open position producing a spring force tending to return to the clamped position.

2. The ligating clip of claim 1, wherein the hinge portion is arcuate.

3. The ligating clip of claim 1, wherein the first clamping surface has a first tooth formed thereon and the second clamping surface has a second tooth formed thereon, the first tooth and the second tooth being offset from one another in a direction perpendicular to a longitudinal direction of the ligating clip in the clamped position.

4. The ligating clip of claim 3, wherein the first tooth and the second tooth are formed in plurality.

5. The ligating clip of claim 4, wherein the first clamping surface has a row of first teeth formed thereon and the second clamping surface has two rows of second teeth formed thereon, the first teeth being centered on the first clamping surface and the second teeth being on either side of the second clamping surface in a direction perpendicular to the longitudinal direction of the ligating clip.

6. The ligating clip of claim 5, wherein the first tooth and/or the second tooth have an abutment surface configured to abut tissue clamped by the ligating clip when the ligating clip is in a clamped position to prevent movement of tissue.

7. The ligating clip of claim 1, wherein the first jaw member comprises a hook at a distal portion and the second jaw member comprises a boss at a distal portion, the hook configured to engage the boss to retain the ligating clip in a clamped position.

8. The ligating clip of claim 7, wherein the first jaw member further comprises a boss on the distal portion, the boss of the first jaw member and the boss of the second jaw member being engageable with a slot of a clip applier.

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