CN210077776U

CN210077776U - Hemostatic clamp

Info

Publication number: CN210077776U
Application number: CN201920034083.4U
Authority: CN
Inventors: 王仪振; 王进; 张凯; 周鹏; 谢强
Original assignee: CHENGDU DIKANG ZHONGKE BIOMEDICAL MATERIAL Co Ltd
Current assignee: CHENGDU DIKANG ZHONGKE BIOMEDICAL MATERIAL Co Ltd
Priority date: 2019-01-08
Filing date: 2019-01-08
Publication date: 2020-02-18
Anticipated expiration: 2029-01-08

Abstract

The utility model relates to a hemostatic clamp, which comprises a first clamping arm, a second clamping arm and a connecting part, wherein one end of the first clamping arm is connected with one end of the second clamping arm through the connecting part, the inner side surfaces of the first clamping arm and the second clamping arm are provided with anti-skid teeth distributed in a lattice manner, the anti-skid teeth on the first clamping arm and the second clamping arm are in a concave-convex corresponding state, the ends of the first clamping arm and the second clamping arm are buckled together through a locking structure, the locking structure comprises a hook groove part arranged at the end of the first clamping arm and a hook part arranged at the end of the second clamping arm, a groove is arranged on the inner surface of the hook part, and a convex rib which is correspondingly clamped with the groove is arranged on the hook groove part; the cross sections of the first clamping arm and the second clamping arm are H-shaped. The utility model discloses a hemostatic clamp can show the closure ability and the closed effect that improve hemostatic clamp, effectively reduces the weeping, prevents that hemostatic clamp pine from taking off, and the bullet is opened to effectively improved hemostatic clamp and executed clamp, the commonality that the pine clamp cooperation was used.

Description

Hemostatic clamp

Technical Field

The utility model relates to a medical instrument for surgery and endoscopic surgery. And in particular to a hemostatic clip for occluding blood vessels or tissue during a surgical procedure. Such hemostatic clips are also commonly referred to in practice as ligation clips, vascular clips, tissue clips, and the like.

Background

To fully expose the surgical field during surgery, it is necessary to ligate the severed blood vessels within the incision to bleed the tissue. At present, hemostatic forceps are used for clamping a fractured blood vessel and then are ligated by using a suture, the method is troublesome to operate, and the operation efficiency is reduced; another method is to occlude the blood vessel or tissue tract with a hemostatic clip to block blood flow and fluid in the tissue tract. At present, most of materials are alloy, absorbable medical plastics and non-absorbable medical plastics.

The principle of the hemostatic clamp on the market is different from the principle of the hemostatic clamp in the same size, and the hemostatic clamp completes the clamping or locking of blood vessels or tubular tissues through proper structural design and depending on the mechanical properties of product materials so as to play a clinical clamping role. In addition, the hemostatic clamp is used by matching with corresponding tools such as a clip applier and a clip releaser, and although the clip applier and the clip releaser have the industry recommended standard YY/T0597-2006 clip applier, the content of the clip applier and the clip releaser does not have an accurate and strict design standard, so that the tools of various manufacturers have certain design difference. In addition, manufacturers of such products as hemostatic clamps have no corresponding design standard, so that the situations of non-matching use, inconvenient operation and the like are inevitable, and therefore, it is necessary to improve the functionality and the universality of the design of the hemostatic clamps and reduce the problem of clinical use.

In addition, the most common problems of the existing hemostatic clamp in the clinical use process are that the closure effect is poor, the hemostatic clamp is easy to loosen and take off, and leakage is easy to occur, so that unnecessary troubles are brought to the operation process. Therefore, the hemostatic clamp in the prior art still has a place which needs innovation in structure so as to improve the closing capability and the closing effect of the hemostatic clamp, reduce leakage, prevent the hemostatic clamp from loosening and bouncing, improve the universality of the hemostatic clamp used in cooperation with a clip applier and a clip releaser, and the like, and become a technical problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to provide a hemostatic clamp to overcome the defects existing in the prior art.

In order to realize the above-mentioned utility model purpose, the utility model provides a hemostatic clamp, including first arm lock, second arm lock and connecting portion, the one end of first arm lock is passed through connecting portion and is connected with the one end of second arm lock, the medial surface of first arm lock and second arm lock is provided with the antiskid tooth that is the dot matrix and distributes, the dot matrix of antiskid tooth comprises rectangle antiskid tooth or circular antiskid tooth, antiskid tooth in first arm lock and the second arm lock is unsmooth corresponding state, and the distribution density of antiskid tooth is bigger, and the line footpath of antiskid tooth is smaller, and the distribution density of antiskid tooth is smaller, and the line footpath of antiskid tooth is bigger.

Preferably, at 1cm²Within the range, the density of the dot matrix is 30-600, and the diameter of the corresponding anti-skid tooth is 0.5-0.2 mm.

Preferably, the tail ends of the first clamping arm and the second clamping arm are buckled together through a locking structure, the locking structure comprises a hook groove part arranged at the tail end of the first clamping arm and a hook part arranged at the tail end of the second clamping arm, a groove is arranged on the inner surface of the hook part, and a convex rib correspondingly clamped with the groove is arranged on the hook groove part.

Preferably, the distribution of the anti-skid teeth gradually becomes thinner from the middle of the clamping arm to two ends, the size of the anti-skid teeth gradually becomes smaller from the middle of the clamping arm to two ends, and the dot matrix distribution of the two arms is in a concave-convex corresponding relation.

Preferably, the anti-slip teeth on the first clamping arm are single anti-slip teeth distributed in a strip shape along the long axis of the first clamping arm, the anti-slip teeth on the second clamping arm are double anti-slip teeth distributed in a strip shape along the long axis of the second clamping arm, when the hemostatic clamp is closed, the single anti-slip teeth on the first clamping arm are positioned in the middle of the double anti-slip teeth of the second clamping arm, so that anti-slip positioning is realized while the two arms are prevented from being folded, and dislocation is avoided.

The utility model discloses still provide another hemostatic clamp, including first arm lock, second arm lock and connecting portion, the one end of first arm lock is passed through connecting portion and is connected with the one end of second arm lock, is provided with horizontal recess on the medial surface of first arm lock, the major axis evenly distributed of first arm lock is followed to horizontal recess, be provided with on the medial surface of second arm lock with the horizontal protruding muscle that horizontal recess corresponds, horizontal recess and horizontal protruding muscle cooperation location still be provided with the antiskid tooth on the horizontal recess be provided with on the horizontal protruding muscle with the antiskid groove that the antiskid tooth corresponds.

Preferably, the cross-sectional shapes of the transverse grooves and the transverse ribs are arc, triangular or trapezoidal, and the anti-skid teeth are rhombic or conical.

Preferably, the cross section of the first clamping arm and the second clamping arm is a rectangle with a length a and a width b, and the length-width ratio of the rectangular section is set as 1: 0.8-1: 0.5.

preferably, the cross sections of the first clamping arm and the second clamping arm are H-shaped, symmetrical rectangular grooves are formed in the upper portion and the lower portion of the cross section of the H-shaped clamping arm, the width of each rectangular groove accounts for 20% -40% of the length a of the cross section of the clamping arm, and the depth of each rectangular groove accounts for 10% -30% of the width b of the cross section.

Preferably, the width of the rectangular groove accounts for 30% of the length a of the cross section of the clamping arm, and the depth of the rectangular groove accounts for 20% of the width b of the cross section.

The utility model discloses a hemostatic clamp gains beneficial effect as follows:

1. the hemostatic clamp of the utility model has better closing effect, high reliability and universality for matching with clip applier and clip releaser;

2. the anti-skid teeth of the hemostatic clamp are distributed in a lattice shape and are in a concave-convex corresponding state, so that gaps after the hemostatic clamp is closed can be reduced, the clamping effect is obviously improved, and the clamping reliability is enhanced;

3. the utility model discloses a hemostatic clamp, the recess and protruding muscle cooperation location have been designed respectively on two arm binding face, simultaneously on recess and protruding muscle again design anti-skidding tooth and antiskid groove, synthesize two designs, when preventing that dislocation from appearing when two arms fold, still guaranteed that hemostatic clamp can not appear shifting in the actual clamping blood vessel and tissue process, moreover the utility model discloses still provide another structure, namely form the location in the antiskid while through the single anti-skidding tooth on one arm and the two anti-skidding tooth on the other arm to prevent that dislocation from appearing when two arms fold, effectively solved when hemostatic clamp closes two arms fold the back by human tissue seepage lubrication the technical problem that the dislocation phenomenon appears;

4. the groove is added on one arm of the lock catch of the hemostatic clamp, and the convex rib is added on the other arm of the lock catch, so that the two arms can be prevented from loosening due to unstable lock catch after closing;

5. the cross section of the clamping arm of the hemostatic clamp is designed to be rectangular, so that the hemostatic clamp has excellent bending strength, the width of two arms of the hemostatic clamp can be reduced, and the universality of the hemostatic clamp is improved; further, the utility model discloses two arm cross-sections design that press from both sides the hemostasis to be H shape, not only can improve the tensile strength that the hemostasis pressed from both sides, can also less hemostasis press from both sides's overall dimension, improve the hemostasis press from both sides and execute the matching degree of clamp, increase the hemostasis press from both sides and execute clamp complex gap size, prevent that blood vessel or tissue thing card from pressing from both sides two arms and executing between the clamp recess, cause the unable smooth and easy clamp of follow of hemostasis press from both sides to drop.

Drawings

FIG. 1 is a schematic view of the hemostatic clamp of the present invention;

FIG. 2 is a schematic view of a locking arrangement of the hemostatic clip;

FIG. 3 is a schematic cross-sectional view of a clamp arm;

FIG. 4 is a schematic view of another embodiment of the hemostatic clip;

FIG. 5 is a schematic view of a still further embodiment of the hemostatic clip;

FIG. 6 is a schematic view of an H-shaped cross section of the clamp arm;

FIG. 7a is a schematic diagram of the start of the test process;

fig. 7b is a schematic diagram of the end of the test process.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description. The inner side surface of the clamping arm refers to the binding surface of two arms.

Example one

As shown in fig. 1, the utility model provides a hemostatic clamp 1, including first arm lock 11, second arm lock 12, and connecting portion 13, the one end of first arm lock 11 is passed through connecting portion 13 and is connected with the one end of second arm lock 12, connecting portion 13 and two arm lock can be integrated into one piece, also can be the built-up connection together.

The medial surface of first arm lock 11 and second arm lock 12 is provided with and is the anti-skidding tooth 14 of dot matrix distribution, the dot matrix of anti-skidding tooth comprises rectangle anti-skidding tooth or circular anti-skidding tooth, anti-skidding tooth on first arm lock 11 and the second arm lock 12 is unsmooth corresponding state, can reduce the gap after hemostatic clamp closes, improves the clamp effect of closing. The larger the distribution density of the anti-skid teeth is, the smaller the line diameter of the anti-skid teeth is; the smaller the distribution density of the anti-skid teeth is, the larger the line diameter of the anti-skid teeth is. Typically, at 1cm²Within the range, the density of the dot matrix is 30-600, and the diameter of the corresponding anti-skid tooth is 0.5-0.2 mm.

As shown in fig. 2, the ends of the first and

second clamp arms

11 and 12 are fastened together by a locking structure including a hook-and-slot portion provided at the end of the first clamp arm 11 and a hook portion provided at the end of the second clamp arm 12, and in order to effectively prevent the two arms from being released due to unstable locking structure, a groove 121 is provided on the inner surface of the hook portion, and a rib 111 is provided on the hook-and-slot portion to be engaged with the groove 121. When the hemostatic clamp is closed, the hook part is clamped in the hook groove part, and meanwhile, the convex rib 111 is clamped in the groove 121, so that the two arms can be prevented from being loosened due to unstable locking structure after the hemostatic clamp is closed.

In addition, the size of the arms of the clip significantly affects the tensile strength of the clip, but the tensile strength of the clip tends to be more dependent on the cross-sectional shape of the arms. As shown in fig. 3, the cross section of the first clamping arm 11 and the second clamping arm 12 of the hemostatic clamp of the present invention is rectangular, and the length-width ratio of the rectangular section is set to 1: 0.8-1: 0.5. the utility model discloses a hemostatic clamp possess fabulous bending strength, and show the width that has reduced hemostatic clamp two arms, effectively improved hemostatic clamp's commonality. The utility model discloses a hemostatic clamp reasonable length-width ratio and cross sectional shape not only can improve hemostatic clamp's tensile strength, reduce hemostatic clamp's overall dimension, but also improved hemostatic clamp and the degree of matching of executing the clamp, increased hemostatic clamp and executed clamp complex gap size, can prevent effectively that blood vessel or tissue thing card from pressing from both sides two arms and executing between the clamp recess, cause the unable smooth and easy follow of hemostatic clamp to execute and clamp and drop.

Furthermore, in the operation process, when the density of the dot matrix is uniformly distributed, the blood vessel can be clamped to achieve a good closing effect, but if the density of the dot matrix is not properly set, the wall of the blood vessel can be damaged. On this basis, the utility model discloses the distribution that sets up the antiskid tooth becomes thin gradually to both ends in the middle of by the arm lock, and the size of antiskid tooth can be even, also can diminish to both ends gradually by the arm lock in the middle of, and two arm dot matrix distributions are unsmooth corresponding relation simultaneously. The utility model discloses the gradual change of the antiskid tooth of hemostatic clamp distributes for when the clamp closes the blood vessel, the closed effect of hemostatic clamp can be improved to middle intensive antiskid tooth, effectively avoids the emergence of weeping, and simultaneously, the antiskid tooth that the arm lock both ends become thin gradually effectively avoids causing the damage to the vascular pipe wall.

Example two

In order to solve the problem that the two arms fold when the hemostatic clamp is clamped, the dislocation phenomenon appears after the two arms fold by the lubrication of human tissue seepage, the utility model provides a two kinds of structures carry out the location after folding to two arms. The omitted portions of the present embodiment are the same as those of the above-described embodiment.

As shown in fig. 4, the utility model discloses a hemostatic clamp is provided with horizontal recess 21 on the medial surface of first arm lock 11, horizontal recess 21 is provided with on the medial surface of second arm lock 12 with horizontal protruding muscle 22 that horizontal recess 21 corresponds, horizontal recess 21 and horizontal protruding muscle 22 cooperation location are in simultaneously still be provided with anti-skidding tooth 14 on the horizontal recess 21 be provided with on the horizontal protruding muscle with anti-skidding groove 15 that the anti-skidding tooth corresponds synthesizes two designs, through horizontal recess 21 and horizontal protruding muscle 22 cooperation location effectively prevent the dislocation of appearing when two arms fold, guarantee simultaneously through the cooperation of anti-skidding tooth 14 and anti-skidding groove 15 that the hemostatic clamp can not appear shifting at actual clamping vessel and tissue in-process.

Further, the cross-sectional shapes of the transverse grooves and the transverse ribs can be arc-shaped, triangular, trapezoidal and the like; the shape of the anti-skid teeth can be rhombic or conical, and the distribution density is from 0.2 to 2mm²The density here refers to the density of the distribution of the concave and convex points.

EXAMPLE III

Further, as shown in fig. 5, the utility model discloses a hemostatic clamp is provided with in the middle of first arm lock 11's medial surface and is the single antiskid tooth that strip distributes along first arm lock 11's major axis, and the medial surface of second arm lock 12 is provided with and is the two antiskid teeth that strip distributes along second arm lock 12's major axis, and when hemostatic clamp closed, the single antiskid tooth in first arm lock 11 was located the two antiskid tooth central authorities of second arm lock 12, forms the location in the skid-proof while to the dislocation appears when preventing that two arms from folding. The shape of the anti-skid teeth can be rhombic or conical, and the distribution density is 0.2-2 mm²All can be used. The omitted portions of the present embodiment are the same as those of the above-described embodiment.

Example four

When the hemostatic clamp is designed, in order to improve the tensile strength of the hemostatic clamp, the cross section of the clamping arm of the hemostatic clamp is designed to be a rectangle with the length of a and the width of b, and further, as shown in fig. 6, the sections of the two arms of the hemostatic clamp are designed to be H-shaped, the upper part and the lower part of the H-shaped section are provided with symmetrical rectangular grooves, the width of each rectangular groove accounts for 20% -40% of the length a of the cross section of the clamping arm, and the depth of each rectangular groove accounts for 10% -30% of the width b of the cross section of the clamping arm; further studies have found that the tensile strength is optimal when the rectangular grooves are 0.3a wide and 0.2b deep. Tensile tests were performed as follows using the preferred embodiment:

the cross sections of the two arms of the hemostatic clamp are H-shaped, the bending resistance of the two arms can be increased under the condition that the hemostatic clamp is tightly matched with the clip applying clamp, through tests, the cross section is changed from a rectangle to the H shape under the condition that the same material is used as a standard and the length and width dimensions of the cross section are the same, a sample is made of the same high polymer material by using a mold to perform a tensile strength test, the cross section area is reduced by about 12%, but the tensile strength is increased by 7.8% on the contrary, and the test method is as follows:

as shown in fig. 7a and 7b, taking a rectangle with a cross section of two clamping arms being a length a and a width b as an example, one end of each of two silk threads with sufficient strength is respectively bound and fixed at a central position of two arms of the hemostatic clamp, the other end of each of the two silk threads is respectively fixed on a tensile machine, after the hemostatic clamp is clamped, the binding points are adjusted to be at the same horizontal position, and the two silk threads are pulled apart at a speed of 50mm/min in the direction of an arrow shown in the figure; in the same way, testing the hemostatic clips with the H-shaped sections of the two clamping arms, wherein the rectangular grooves of the hemostatic clips with the H-shaped sections of the two clamping arms are 0.3a wide and 0.2b deep; the test data are shown in table 1:

TABLE 1

As can be seen from Table 1, the cross section of the hemostatic clip with the H-shaped cross section of the two clip arms is reduced, and simultaneously, the tensile strength of the hemostatic clip is not reduced, but is increased by 8.5% on average, the tensile strength of the hemostatic clip is increased by 12% in the best embodiment, and unexpected technical effects are achieved.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims

1. The utility model provides a hemostatic clamp, includes first arm lock, second arm lock and connecting portion, the one end of first arm lock is passed through connecting portion and is connected with the one end of second arm lock, the medial surface of first arm lock and second arm lock is provided with the antiskid tooth that is the dot matrix and distributes, the dot matrix of antiskid tooth comprises rectangle antiskid tooth or circular antiskid tooth, antiskid tooth in first arm lock and the second arm lock is unsmooth corresponding state, its characterized in that: the larger the distribution density of the anti-skid teeth is, the smaller the linear diameter of the anti-skid teeth is, the smaller the distribution density of the anti-skid teeth is, and the larger the linear diameter of the anti-skid teeth is;

the distribution of antiskid tooth is by becoming thin gradually to both ends in the middle of the arm lock, and the size of antiskid tooth diminishes gradually to both ends in the middle of the arm lock simultaneously, and two arm dot matrix distributions are unsmooth corresponding relation simultaneously.

2. The hemostatic clip of claim 1, wherein: at 1cm²Within the range, the density of the dot matrix is 30-600, and the diameter of the corresponding anti-skid tooth is 0.5-0.2 mm.

3. The hemostatic clip of claim 1, wherein: the tail ends of the first clamping arm and the second clamping arm are buckled together through a locking structure, the locking structure comprises a hook groove part arranged at the tail end of the first clamping arm and a hook part arranged at the tail end of the second clamping arm, a groove is arranged on the inner surface of the hook part, and a convex rib corresponding to the groove in clamping is arranged on the hook groove part.

4. The hemostatic clip of claim 1, wherein: the anti-skidding teeth on the first clamping arm are single anti-skidding teeth which are distributed in a strip shape along the long axis of the first clamping arm, the anti-skidding teeth on the second clamping arm are double anti-skidding teeth which are distributed in a strip shape along the long axis of the second clamping arm, when the hemostatic clamp is closed, the single anti-skidding teeth on the first clamping arm are positioned in the middle of the double anti-skidding teeth of the second clamping arm, so that the anti-skidding teeth are positioned while preventing the two arms from being folded, and the dislocation is avoided.

5. The utility model provides a hemostatic clamp, includes first arm lock, second arm lock and connecting portion, the one end of first arm lock is connected its characterized in that through the one end of connecting portion with the second arm lock: the inner side surface of the first clamping arm is provided with a transverse groove, the transverse groove is uniformly distributed along the long shaft of the first clamping arm, the inner side surface of the second clamping arm is provided with a transverse convex rib corresponding to the transverse groove, the transverse groove and the transverse convex rib are matched and positioned, the transverse groove is further provided with anti-skidding teeth, and the transverse convex rib is provided with anti-skidding grooves corresponding to the anti-skidding teeth.

6. The hemostatic clip of claim 5, wherein: the cross sections of the transverse grooves and the transverse ribs are arc-shaped, triangular or trapezoidal, and the anti-skid teeth are rhombic or conical.

7. The hemostatic clip according to any one of claims 1-6, wherein: the cross sections of the first clamping arm and the second clamping arm are rectangles with the length being a and the width being b, and the length-width ratio of the rectangular sections is set to be 1: 0.8-1: 0.5.

8. the hemostatic clip according to any one of claims 1-6, wherein: the cross sections of the first clamping arm and the second clamping arm are H-shaped, symmetrical rectangular grooves are formed in the upper portion and the lower portion of the cross section of the H-shaped clamping arm, the width of each rectangular groove accounts for 20% -40% of the length a of the cross section of the clamping arm, and the depth of each rectangular groove accounts for 10% -30% of the width b of the cross section.

9. The hemostatic clip of claim 8, wherein: the width of the rectangular groove accounts for 30% of the length a of the cross section of the clamping arm, and the depth of the rectangular groove accounts for 20% of the width b of the cross section.