Easily-pulled-out type composite bone needle structure

Abstract

The invention relates to an easily-pulled-out type composite bone needle structure. The bone needle structure comprises a metal needle body, a levorotatory polylactic acid needle body and a metal needle handle, wherein the metal needle body comprises a base section and an elastic sheath plate; the levorotatory polylactic acid needle body is embedded in the metal needle body and is coaxially distributed with the metal needle body; the front end face of the levorotatory polylactic acid needle body exceeds the front end face of the metal needle body by at least 5 mm; at least 30% of the area of the inner surface of the elastic sheath plate in the metal needle body abuts against the outer surface of the levorotatory polylactic acid needle body; and the metal needle handle is connected with therear end face of the base section of the metal needle body through a positioning groove and is coaxially distributed with the metal needle body. On one hand, the bone needle structure has good structural strength and can effectively increase a bone healing speed; and on the other hand, the efficiency of pulling of the bone needle structure out of a bone can be effectively improved, a wound area is small after the bone needle structure is pulled out, and rapid healing of a wound is facilitated.

Description

technical field [0001] The invention relates to a bone spicule device, in particular to an easy-to-extract composite bone spicule structure. Background technique [0002] Bone needles are currently one of the important tools for positioning bones such as fractures, and are widely used. However, in actual use, it has been found that current bone needles are often made of pure titanium or titanium alloy lamp metal materials, and bone The surface of the needle is smooth and the diameter is small, so that when the bone needle is pulled out from the human body, the resistance between the bone needle and human tissue increases due to factors such as human bones and muscles, which makes it difficult to pull out. The surface of the needle is smooth and the diameter is small, which further increases the difficulty of pulling out the bone needle. It often requires a variety of tools to achieve the purpose of pulling out the bone needle. The labor intensity is high, the operation safet...

AI Technical Summary

Problems solved by technology

[0002] Bone needles are currently one of the important tools for positioning bones such as fractures, and are widely used. However, in actual use, it has been found that current bone needles are often made of pure titanium or titanium alloy lamp metal materials, and bone The surface of the needle is smooth and the diameter is small, so that when the bone needle is pulled out from the human body, the resistance between the bone needle and human tissue increases due to factors such as human bones and muscles, which makes it difficult to pull out. The surface of the needle is smooth and the diameter is small, which further increases the difficulty of pulling out the bone needle. It often requires a variety of tools to achieve the purpose of pulling out the bone needle. The labor intensity is high, the operation safety is relatively low, and it is easy to cause the wound to expand And cause the patient's suffering to increase phenomenon, in view of this problem, although have developed a variety of bone spicule structures that are convenient to pull out operation at present, as application number is: the bone spicule structure of 201520809169. Improve the efficiency of pulling out and reduce labor intensity, but it is often necessary to add additional structures such as "blade" to the structure of the bone needle, which leads to an increase in the structure of the bone needle and increases the difficulty of processing the bone needle, which also causes the bone needle to cause harm to the patient. The increase of the wound surface is not conducive to the healing and recovery of the patient's wound. In addition, because the current bone needles are all made of pure metal, they cannot effectively nourish the damaged bone during the bone positioning process. Repair, which will have an unreasonable impact on the recovery efficiency of the patient's bone wound, and lead to slow healing of the bone wound. At the same time, it also has the ability to cover the wound on the external bone needle part of the patient's body and the contact surface between the bone needle and the patient's skin. , so it is very easy to cause bone needle displacement due to external force impact and wound infection due to pollutant adhesion, which seriously affects the efficiency of wound healing and also causes greater pain and risk to patients

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