Metacarpal and phalanx avulsion fracture reduction needling guide

Abstract

The invention provides a metacarpal and phalanx avulsion fracture reduction needling guide comprising a right caliper handle and a left caliper handle. The right caliper handle is hinged to the left caliper handle through a hinged shaft, the front end of the right caliper handle is provided with a right caliper head, the front end of the left caliper handle is provided with a left caliper head, the left caliper head corresponds to the right caliper head, the outer end of the right caliper head is provided with a fixed needling guide head, the fixed needling guide head is provided with a needling guide hole, the outer end of the left caliper head is provided with a skin support, the outer end face of the skin support is of a plane structure, and the needling guide hole of the fixed needlingguide head is opposite to the outer end face of the skin support. The metacarpal and phalanx avulsion fracture reduction needling guide is simple in structure, convenient to manufacture and low in cost, can provide an ideal entry point and needling angle for a Kirschner wire (or a hollow nail guide needle), thereby improving the one-time success rate of needling, which improves the accuracy of needling, reduces the number of intraoperative perspectives, and shortens the operation time.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a needle guide for metacarpophalangeal avulsion fracture reduction. Background technique [0002] Metacarpal and phalanx avulsion fracture is a common case in hand surgery, and (open) reduction, Kirschner wire or internal fixation with hollow nails are commonly used treatment methods. However, there are certain difficulties in this traditional reduction and fixation method: 1. The avulsed bone fragments are generally attached to the insertion points of ligaments or tendons. The alignment relationship is maintained stably. 2. The avulsed bone fragments are generally attached by the ligament or tendon insertion point, and the bone fragments are small. If the ordinary vascular forceps are used to reset and clamp the bone fragments, the exposed area on the surface of the bone fragments for needle penetration is small, which is difficult to Find a satisfactory ne...

AI Technical Summary

Problems solved by technology

However, there are certain difficulties in this traditional reduction and fixation method: 1. The avulsed bone fragments are generally attached to the insertion points of ligaments or tendons. maintain stable alignment

2. The avulsed bone fragments are generally attached by the ligament or tendon insertion point, and the bone fragments are small. If the ordinary vascular forceps are used to reset and clamp the bone fragments, the exposed area on the surface of the bone fragments for needle penetration is small, which is difficult to Find a satisfactory needle entry point; if it is fixed with towel forceps, the single-point contact with the bone block is not stable enough

3. If ordinary vascular forceps or towel forceps are used to clamp the contralateral skin during repositioning and maintaining alignment, it will inevitably cause iatrogenic damage to the skin and soft tissues

4. After the reduction is satisfactory, when the Kirschner wire (or hollow nail guide wire) is used for fixation, the requirements for the needle insertion point and the needle insertion angle are relatively high: the ideal needle insertion point is the center of the bone block, and the ideal needle insertion angle is perpendicular to the fracture line , which requires high experience and technical level of the operator, the success rate of one-time needle puncture is low, the operator is prone to fatigue, and it is easy to prolong the operation time. Multiple needle punctures will cause loosening of the Kirschner wire, local osteonecrosis, and bone resorption , Unstable fracture fixation and even lead to shattered bone fragments. Repeated fluoroscopy during the operation will increase the physical damage of X-rays to both doctors and patients.

Therefore, this method requires higher experience, technology and physical strength of the operator.

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