Pedicle screw rod internal fixing device taking positioning pin as inner core

Abstract

The invention discloses a pedicle screw rod internal fixing device with a positioning pin as an inner core. The pedicle screw rod internal fixing device comprises a connecting rod, a pedicle screw body and a pin. The connecting rod is in a cylindrical shape; scale marks are arranged on the side face of the connecting rod. The pedicle screw main body comprises a separation part, a locking part and a screw part which are connected in sequence. The locking part comprises a locking disc and two locking lugs. The two locking lugs are connected with the edges of the two sides of the locking disc respectively. After thepedicle screw rod internal fixing device is installed on a human body, the connecting rod is located between the two locking lugs. The locking part can be fixed with and separated from different positions of the connecting rod. the end part of the outer end of the screw part is sharp. The pedicle screw main body is provided with a center hole penetrating through the screw part and the locking disc and used for being matched with a pin. The separation part can be separated from the locking part.

Description

technical field [0001] The invention belongs to the technical field of pedicle screws, in particular to a pedicle screw rod internal fixation system with a positioning tip as the inner core, which is mainly used in thoracolumbar fractures, intervertebral disc herniation, spinal stenosis, and spinal deformity , spinal infection, spinal tumors and other orthopedic diseases that require internal fixation with a screw-rod system. Background technique [0002] At present, there are two kinds of pedicle screws that have been publicly used at home and abroad: one is conventional pedicle screws, such as GSS thoracolumbar internal fixation system, USS screw-rod system, and domestic systems such as Kehui and Weigao. It is a solid screw. When PLIF, TLIF, or MIS-TLIF minimally invasive surgery is used to place pedicle screws, there are no guiding signs during the operation, and repeated fluoroscopy with a C-arm X-ray machine is required. If the screw is placed by hand, the displacement...

AI Technical Summary

Problems solved by technology

If the screw is placed by hand, the displacement of the screw track is likely to cause the deviation of the track of the pedicle screw. In severe cases, the spinal cord and nerve root may be stimulated by the pedicle screw breaking into the spinal canal, causing catastrophic symptoms such as cerebrospinal fluid leakage, nerve root paralysis, or paraplegia. as a result of

In addition, repeated fluoroscopy during the operation prolongs the entire operation time and increases the risk of infection during the operation; the other is the percutaneous Sextant pedicle screw internal fixation system produced by the foreign shufamo company. Its pedicle screw Part is hollow design, but the U-shaped part at the top is short, which is not conducive to the placement of connecting rods

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