Internal fixing device for minimally-invasive percutaneous penetration

Abstract

The invention relates to an internal fixing device for minimally-invasive percutaneous penetration. The internal fixing device comprises a minimally-invasive holding sleeve and a minimally-invasive pedicle screw. The minimally-invasive holding sleeve is composed of a minimally-invasive casing pipe, a locking sleeve, a sliding groove pin, a locking screw and an anti-rotation pin. The minimally-invasive pedicle screw is composed of a screw cap, a screw body and a pressing washer. A horizontal protrusion of the inner wall of the front end of the minimally-invasive holding sleeve and the anti-rotation pin are matched with a cross-shaped groove of the outer side of the screw cap of the minimally-invasive pedicle screw, so that the multi-direction movement of the screw is limited. Automatic bar pressing can be achieved in an operation through the lengthening design of the screw cap of the minimally-invasive pedicle screw, bar penetrating is simple, the protrusion of the outer side of the minimally-invasive holding sleeve and the elastic design are utilized to lock the screw in the use process, and the screw is reinforced and fixed through the locking screw. The internal fixing device has the advantages that as the unique design of the inner wall of the minimally-invasive holding sleeve is matched with the cross-shaped groove of the outer side of the screw cap of the minimally-invasive pedicle screw, screw holding and dismantling operation is simple, fast and effective; due to the design of the two thin walls of the front end of the holding sleeve, trauma of tissue channels is small; the problems of difficulty of bar penetrating and complexity of locking and pressurizing of the screw cap and the like in the operation can be solved.

Description

【Technical field】 [0001] The invention relates to the technical field of surgical medical instruments, in particular to a minimally invasive percutaneous internal fixation device. 【Background technique】 [0002] With the continuous update of surgical instruments, the continuous emergence of advanced medical imaging equipment and the application of intraoperative computer-aided navigation, minimally invasive techniques have developed rapidly in spinal surgery. Minimally invasive refers to a kind of operation or inspection method that achieves the best surgical effect with the least invasion and the least physiological interference, and the most important feature is the minimization of trauma. Surgery is a planned trauma, and the surgeon should try to minimize the trauma of the operation and achieve the goal of minimally invasive. Minimally invasive surgery reduces operation time, reduces the incidence of complications, reduces intraoperative tissue damage and bleeding, short...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a minimally invasive percutaneous access internal fixation device, which is easy to operate, causes little damage to the skin, and can solve problems such as difficulty in rod insertion and complicated locking and pressurization of nuts.

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