Ligation clip with shape memory function

Abstract

The invention provides a ligature clip with a shape memory function, and relates to the technical field of auxiliary medical instruments. The ligature clip comprises a clip body made of a bidirectional shape memory polymer, and the clip body has an initial shape and a temporary shape; the clamp body is suitable for being implanted into a tissue to be sealed and bound in a temporary shape and then responding to external condition stimulation to form the initial shape, and the initial shape is suitable for being wound on the tissue and applying compression force to the tissue to block blood flow. The ligature clip made of the bidirectional shape memory polymer can be reversibly transformed between the initial shape and the temporary shape for multiple times after one-time shaping, the deformation amount can be controlled according to actual requirements in the deformation process, then the compression force applied to a blood vessel is adjusted to control the closing degree of the blood vessel, and therefore the flow of blood passing through the ligature clip is controlled, and some special operation requirements are met. In addition, based on control over the deformation process, the clamping force on the blood vessel can be improved, and an anti-slipping effect is enhanced.

Description

technical field [0001] The invention relates to the technical field of auxiliary medical devices, in particular to a ligation clip with a shape memory function. Background technique [0002] Ligation clips are often used for the ligation of tubular structures in surgical operations, and most of them are used for ligation of tissues such as blood vessels. Hemostasis is an indispensable basic operation in surgical operations. No matter what part of the surgical operation is, hemostasis is involved. If hemostasis is not done properly, serious consequences such as massive bleeding, hemorrhagic shock, and even death may occur. In addition to hemostasis, ligation clips can also play a role in vascular separation operations, such as closing unnecessary vascular branches to ensure the normal blood supply of main blood vessels. [0003] Most of the existing ligation clips are made of metal materials and have a certain rigidity. Although they can keep the shape well, they are easy to...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing ligation clips are made of metal materials and have a certain rigidity. Although they can keep the shape well, they are easy to damage blood vessels, especially when electrocoagulation is used during surgery, it is easy to conduct current and damage the blood vessels. Moreover, the installation and disassembly of most metal ligature clips are not easy, and the requirements for the scope of the surgical field are strict. The stress shielding effect of postoperative metal ligature clips can also easily lead to problems such as loosening, wandering, and premature fall-off of the ligature clips, causing postoperative bleeding and thus Secondary damage to blood vessels

Based on this, there are also ligation clips made of high molecular polymer materials such as polydioxanone and p-dioxanone-lactide copolymer to avoid the disadvantages of metal materials, but most of them are not strong enough. It cannot be well applied, and there is often a problem that it cannot be closed, resulting in jumping clips or slipping

[0004] Therefore, no matter what kind of material the ligation clips are in the prior art, there are defects of insufficient clamping force and anti-slip force, and the aforementioned defects will seriously affect the operation effect, and the ligation clips in the prior art are all pre-shaped, closed The shape of the back is fixed, the gap between the two arms is constant, it is difficult to adapt to different situations, the blood flow cannot be adjusted on demand, and the adaptability to tissues of different thickness is low. more likely, and for too thick tissue, there is a risk of crushing it

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