CN109199516B

CN109199516B - Absorbable vascular clamp

Info

Publication number: CN109199516B
Application number: CN201710544485.4A
Authority: CN
Inventors: 孙宝峰; 马猛
Original assignee: Jiangsu Fengh Medical Equipment Co Ltd
Current assignee: Jiangsu Fengh Medical Equipment Co Ltd
Priority date: 2017-07-05
Filing date: 2017-07-05
Publication date: 2020-10-09
Anticipated expiration: 2037-07-05
Also published as: CN109199516A

Abstract

An absorbable vascular clamp includes a first clamp arm, a second clamp arm, and an intermediate member. The opening between first arm lock and the second arm lock is great, the centre gripping blood vessel of being convenient for. The second clip arm may provide feedback that the vascular clip is snapped into place. The vascular clamp includes a bilayer of absorbable material.

Description

Absorbable vascular clamp

Technical Field

The invention relates to an absorbable vascular clamp, and belongs to the field of medical instruments.

Background

Minimally invasive surgery refers to a new technology of providing surgical field through electronic images such as laparoscope and thoracoscope, and performing surgery in human body through instruments such as anastomat. Due to the superiorities of small wound, light pain and quick recovery, minimally invasive surgery is gradually popularized in medical treatment. In minimally invasive surgery, vascular clamps are used to stop bleeding from blood vessels.

Current vascular clamp formula as an organic whole, including first arm lock and second arm lock, during the use, thereby carry out the centre gripping to the blood vessel and realize stanching through the block of first arm lock and second arm lock. The opening angle between the first clamping arm and the second clamping arm depends on the elasticity of materials, so that the opening angle of the existing vascular clamp is small, and the clamping of a blood vessel is not facilitated. In addition, the existing vascular clamps do not provide feedback to the surgeon whether the clamp is in place. The vascular clamp is made of materials which are not absorbed by human body, and the vascular clamp left in the human body is not good for health. Some current vascular clamps have adopted absorbable material, but the intensity of material is relatively poor, leads to this hemostatic clamp's clamping-acting force not enough to because absorption cycle is shorter, can't provide lasting clamping-acting force.

Therefore, it is necessary to provide a further solution to the above problems.

Disclosure of Invention

In view of the deficiencies of the prior art, the present invention is directed to an absorbable vascular clamp that overcomes the deficiencies of the prior art.

A vascular clamp comprises a first clamping arm and a second clamping arm, wherein the first clamping arm comprises a first clamping part, the second clamping arm comprises a second clamping part, and the first clamping part can be clamped with the second clamping part; the vascular clamp further comprises an intermediate piece, and the first clamping arm and the second clamping arm are rotatably connected through the intermediate piece; the vascular clamp is made of a double-layer material, namely magnesium-zinc alloy and a plastic layer coated with the magnesium-zinc alloy.

The first clamping part is arc-shaped, and the second clamping part is provided with a protruding part; the arc-shaped inner side is used for accommodating the protruding part of the second clamping part.

The convex part is provided with a clamping groove, the arc inner side is provided with a clamping hook, and the clamping hook can be clamped into the clamping groove.

The intermediate piece is connected with the first clamping arm or integrally formed.

The intermediate piece comprises a first stop groove and a second stop groove; and one end of the second clamping arm is provided with a pin shaft, and the pin shaft can move from the first stop groove to the second stop groove.

When the vascular clamp is opened, the pin shaft is positioned in the first stop groove; in the process that the second clamping arm and the first clamping arm are close to each other, the pin shaft moves from the first stop groove to the second stop groove; the second stop groove is provided with an upper bulge and a lower bulge so as to prevent the pin shaft from being separated from the second stop groove after entering the second stop groove.

The second clip arm changes from a first shape to a second shape from before to after the vascular clip is engaged.

The first shape is a curved shape and the second shape is a linear shape.

The first clamping arm further comprises a first limiting part, the second clamping arm further comprises a second limiting part, and the first limiting part and the second limiting part are cylindrical bulges.

The plastic layer is made of absorbable polymer material. The absorbable polymer material is PLA.

The magnesium-zinc alloy comprises: 1 to 6 weight percent of zinc and 94 to 99 weight percent of magnesium.

Through setting up the middleware, can increase the angle that opens between first arm lock and the second arm lock, the centre gripping blood vessel of being convenient for. The second clip arm may provide feedback that the vascular clip is snapped into place. The vascular clamp adopts double-layer absorbable materials, so that the strength of the vascular clamp is ensured, the time of absorption by a human body is prolonged, and the clamping time of the blood vessel is prolonged.

Drawings

FIG. 1 is a schematic view of a vascular clamp of the present invention shown deployed;

FIG. 2 is a schematic view of the vascular clamp of the present invention during initial engagement;

FIG. 3 is a schematic view of the vascular clip of the present invention after it has been snapped into place;

figure 4 is a schematic view of an intermediate piece of the vascular clamp of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 to 3, the absorbable vascular clamp of the present invention comprises a first clamp arm 1, a second clamp arm 2, and an intermediate member 3.

One end of the first clip arm 1 has a first engaging portion 101, and one end of the second clip arm 2 has a second engaging portion 201. The other end 102 of the first clamping arm 1 is rotatably connected with the other end 202 of the second clamping arm 2 through an intermediate piece 3.

With respect to "inner" and "outer": the direction towards the space enclosed by the first clamping arm 1 and the second clamping arm 2 is 'inner', the direction away from the space enclosed by the first clamping arm 1 and the second clamping arm 2 is 'outer', and the 'inner' direction and the 'outer' direction are parallel to the plane where the first clamping arm 1 and the second clamping arm 2 are located. With respect to "upper" and "lower": the first clamping arm 1 is located below the second clamping arm 2, as shown in fig. 1 to 3.

As shown in fig. 1 and 2, the first engaging portion 101 is arc-shaped, and the second engaging portion 201 has a protruding portion. As shown in fig. 3, the inner side of the arc (i.e. the inner side of the first engaging portion 101) is used for accommodating the protruding portion of the second engaging portion 201. The protruding portion is provided with a locking groove, and the inner side of the arc is provided with a hook (the locking groove and the hook are not shown), when the protruding portion of the second engaging portion 201 is accommodated in the inner side of the first engaging portion 101, the hook is locked into the locking groove on the protruding portion, so as to realize the locking and stopping of the first engaging portion 101 and the second engaging portion 201.

The other end 102 of the first clamping arm 1 is arc-shaped, and the other end 202 of the second clamping arm 2 is provided with a projection. As shown in fig. 3, the inner side of the arc (i.e., the inner side of the other end 102) is used for accommodating the protrusion of the other end 202 of the second clamping arm 2 after being clamped. As shown in fig. 4, the intermediate member 3 is heart-shaped, and the heart-shaped intermediate member 3 includes a heart-shaped channel having two stop grooves: the distance from the first stop groove to the turning part of the heart-shaped channel is equal to the distance from the second stop groove to the turning part of the heart-shaped channel. Except for the path from the first stop groove to the second stop groove passing through the turning point, the path from the first stop groove to the second stop groove can pass through a curve and does not need to pass through the turning point. The other end 202 of the second clamping arm 2 further has a pin, as shown in fig. 1 and 4, when the second clamping arm 2 is not engaged with the first clamping arm 1, the pin of the other end 202 of the second clamping arm 2 is located in the first stop slot of the intermediate member 3. With the second clamping arm 2 being pressed down and extended, after the second clamping arm 2 is completely attached to the first clamping arm 1, the inner space of the other end 102 of the first clamping arm 1 accommodates the protrusion of the other end 202 of the second clamping arm 2, and the pin moves from the first stop slot to the second stop slot, as shown in fig. 3. One side of the second stop groove close to the turning part of the heart-shaped groove channel is provided with an upper bulge and a lower bulge. In the process that second arm lock 2 is pressed and extends, the round pin axle has certain momentum at the in-process that removes, can make middleware 3 take place elastic deformation and make the round pin axle get into the second after crossing upper and lower two archs and end the position groove, and at this moment, the block of vascular clamp targets in place, and the round pin axle is detained in the second ends the position inslot by upper and lower two archs. The pin shaft can not go over the upper and lower bulges and can not be separated from the second stop groove because the pin shaft does not have the momentum of movement any more. Moreover, as shown in fig. 2, one side of the upper protrusion, which is far away from the second stop groove, is a curved surface, and one side of the upper protrusion, which is near to the second stop groove, is a vertical plane, the curved surface is beneficial to the pin shaft to enter the second stop groove, and the plane is beneficial to preventing the pin shaft from separating from the second stop groove. It should be noted that there are two intermediate pieces 3, and one intermediate piece 3 is distributed on each side of the other end 102 of the first clamping arm 1. The intermediate member 3 is connected to or integrally formed with the other end 102 of the first clamping arm 1. Correspondingly, there are also two pins, one on each side of the other end 202 of the second clamping arm 2.

As shown in fig. 1, the second clip arm 2 has a naturally curved shape in an initial state. As the second arm 2 is pressed and rotates toward the first arm 1, the protrusion of the second engaging portion 201 contacts the first engaging portion 101 of the first arm 1, and the second arm 2 is prevented from rotating further. After the pressure is continuously applied, the second clamping arm 2 begins to deform and extend, and the shape of the second clamping arm extends from a curved line to a straight line. The protruding part of the second engaging part 201 is accommodated inside the first engaging part 101, and the hook inside the first engaging part 101 is engaged with the engaging groove on the protruding part, so as to engage and stop the first engaging part 101 and the second engaging part 201. The inside space of the other end 102 of the first clamping arm 1 accommodates the protrusion of the other end 202 of the second clamping arm 2, the pin moves from the first stop slot to the second stop slot, and the pin is retained in the second stop slot, so that the other end 202 of the second clamping arm 2 is engaged with and locked by the other end 102 of the first clamping arm 1. Thus, as shown in fig. 3, the first clamping arm 1 and the second clamping arm 2 are tightly attached, one ends of the first clamping arm and the second clamping arm are mutually stopped, the other ends of the first clamping arm and the second clamping arm are also mutually stopped, the clamping of the vascular clamp is realized, and the vascular clamp can be clamped to stop bleeding. From before the clamping to after the clamping, the second clamping arm 2 is changed from a curved shape to a straight shape, and the change in the shape can provide tactile feedback for an operator that the vascular clamp is clamped in place.

In order to facilitate the installation of the vascular clamp in the clamping forceps, the first clamping arm 1 further has a limiting portion 103, the limiting portion 103 is disposed near the end of the first clamping arm 1, and the limiting portion 103 is a cylindrical protrusion. The second clamping arm 2 is further provided with a limiting part 203, the limiting part 203 is arranged close to one end of the second clamping arm 2, and the limiting part 203 is a cylindrical protrusion.

The base member material of first arm lock 1, second arm lock 2 and intermediate member 3 is magnesium zinc alloy to, wholly there is the plastic layer, macromolecular material layer on the base member cladding. The plastic layer is made of absorbable high polymer material, preferably PLA (polylactic acid). The magnesium-zinc alloy can provide higher strength for the vascular clamp, so that larger clamping force can be applied to the vascular clamp, the vascular clamp maintains larger clamping force after clamping, and the effect of clamping a blood vessel is ensured. The magnesium-zinc alloy can also supplement trace elements of human bodies. In order to enhance the plasticity of the vascular clamp, the absorbable polymer material layer is coated on the surface of the magnesium-zinc alloy in an all-around manner. Because the degradation time of the plastic layer made of the high polymer material in the human body is longer than that of the magnesium-zinc alloy, the vascular clamp made of the double-layer absorbable material and formed by coating the magnesium-zinc alloy with the high polymer material plastic layer has longer degradation time and longer clamping time on the blood vessel in the human body compared with the vascular clamp made of single materials such as the magnesium-zinc alloy or the high polymer material.

Claims

1. An absorbable vascular clamp comprising a first clamp arm and a second clamp arm, the first clamp arm comprising a first snap-fit portion, the second clamp arm comprising a second snap-fit portion, the first snap-fit portion being snappable with the second snap-fit portion; the vascular clamp is characterized by further comprising an intermediate piece, wherein the first clamping arm and the second clamping arm are rotatably connected through the intermediate piece, and the intermediate piece comprises a first stop groove and a second stop groove; one end of the second clamping arm is provided with a pin shaft, and the pin shaft can move from the first stop groove to the second stop groove; the vascular clamp is made of a double-layer material, namely magnesium-zinc alloy and a plastic layer coated with the magnesium-zinc alloy.

2. The absorbable vascular clip of claim 1, wherein the first snap feature is arcuate in shape and the second snap feature has a protrusion; the arc-shaped inner side is used for accommodating the protruding part of the second clamping part.

3. The absorbable vascular clip of claim 2, wherein a detent groove is provided on the protrusion, and a catch is provided on the inner side of the arc, the catch being engageable in the detent groove.

4. The absorbable vascular clip of claim 1, wherein the intermediate member is connected to or integrally formed with the first clip arm.

5. The absorbable vascular clip of claim 1, wherein the pin is positioned within the first stop groove when the clip is opened; in the process that the second clamping arm and the first clamping arm are close to each other, the pin shaft moves from the first stop groove to the second stop groove; the second stop groove is provided with an upper bulge and a lower bulge so as to prevent the pin shaft from being separated from the second stop groove after entering the second stop groove.

6. The absorbable vascular clip of claim 1, wherein the second clip arm changes from a first shape to a second shape from before to after the clip is snapped.

7. The absorbable vascular clip of claim 6, wherein the first shape is curvilinear and the second shape is linear.

8. The absorbable vascular clip of claim 1, wherein the first clip arm further comprises a first stop portion, the second clip arm further comprises a second stop portion, and the first stop portion and the second stop portion are each cylindrical protrusions.

9. The absorbable vascular clip of claim 1, wherein the plastic layer is formed from an absorbable polymer material.

10. The absorbable vascular clip of claim 9, wherein the absorbable polymeric material is PLA.

11. The absorbable vascular clip of claim 1, wherein the magnesium-zinc alloy comprises: 1 to 6 weight percent of zinc and 94 to 99 weight percent of magnesium.