Automatic pressurization interlocking medullary needle used for orthopaedics therapy

Abstract

The invention provides an automatic pressurization interlocking medullary needle used for orthopaedics therapy, comprising a main needle, a pressurization spring, a pressurization screw rod, interlocking holes, interlocking pins and a biologic artificial bone material, wherein the far end of the main needle is radially provided with two interlocking holes, and two interlocking pins respectively and radially penetrate through the interlocking holes and are fixed with the far end of fracture; the near end is provided with an external pressurization slotted hole which is radially penetrated, and the head part of the near end is provided with a threaded hole; and the biologic artificial bone material is arranged in the external pressurization slotted hole and is positioned between the lower surfaces of the interlocking pins and an internal convex ring formed on the wall of a through hole at the position of the lower end of the external pressurization slotted hole, the length of the biologic artificial bone material is equivalent to pressurization micro-motion quantity required by the fracture end, the pressurization spring is pressed on the interlocking pins, and the pressurization screw rod is pressed on the pressurization spring. By adding the absorbable biologic artificial bone material and a prepressing spring at the locking pins at the near end of the interlocking medullary needle, the medullary needle utilizes the gradual absorption of biologic artificial bone, enables the prepressing spring to stretch, actualizes pressurization to the locking pins at the near end, conducts pressure to the fracture end by mechanics conduction and realizes the pressurization micro-motion of the fracture end.

Description

technical field [0001] The invention relates to a medical device, which is mainly used in trauma orthopedics for the treatment of long bone fractures of extremities, such as femoral shaft fractures, tibial shaft fractures, humeral shaft fractures and other internal fixations - automatic pressurized interlocking intramedullary nail internal fixation system, and fixation Surgical methods and devices and instruments used in the operation. Background technique [0002] Fractures of the long bones of the extremities are common and frequently-occurring diseases in trauma orthopedics. The current treatment methods are divided into conservative treatment and surgical treatment. Conservative treatment mainly refers to manual reduction, while surgical treatment includes open reduction and internal fixation, external fixator fixation, and intramedullary nail fixation, etc. The purpose of each treatment method is to restore the force line of the fracture as soon as possible. As well as...

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