Posterior longitudinal ligament cutter

Abstract

A posterior longitudinal ligament cutter comprises a lower handle, a spring, a push rod, a blade connecting rod, an upper handle, a first connecting rod, a second connecting rod, a first connecting disc and a second connecting disc. The first connecting rod and the lower handle are located on the two sides of the first connecting disc respectively and connected with the first connecting disc. The other end of the first connecting rod is movably connected with one end of the pushing rod through the second connecting part. The other end of the push rod is connected with a blade connecting rod; a blade is rotationally arranged at the other end of the blade connecting rod; the second connecting rod and the upper handle are located on the two sides of the second connecting disc and connected with the second connecting disc. A hook part for hooking the posterior longitudinal ligament is arranged at the other end of the second connecting rod; a cutting groove used for being in sliding fit with the blade is formed in the inner side end face of the hook part. The second connecting disc is movably connected with the first connecting disc through a second connecting part; one end of the spring is connected with the second connecting rod, and the other end is connected with the push rod. The posterior longitudinal ligament cutter is convenient to use and can rapidly cut the posterior longitudinal ligament when a patient is operated.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a posterior longitudinal ligament cutter. Background technique [0002] Anterior cervical decompression and bone grafting and internal fixation is currently a common surgical method for the treatment of various cervical spondylosis. Anterior decompression surgery generally involves resecting the intervertebral disc first, then opening the intervertebral space, and then often needs to resect the posterior longitudinal ligament to achieve full spinal cord recovery. purpose of decompression. Because the rear of the posterior longitudinal ligament is close to the dura mater and is relatively tough, and the surgical site is deep and the operating space is limited, the surgeon uses conventional surgical instruments such as surgical sharp knife, gun forceps, and posterior longitudinal ligament hook to remove the posterior longitudinal ligament. It is more difficult, increas...

AI Technical Summary

Problems solved by technology

Because the rear of the posterior longitudinal ligament is close to the dura mater and is relatively tough, and the surgical site is deep and the operating space is limited, the surgeon uses conventional surgical instruments such as surgical sharp knife, gun forceps, and posterior longitudinal ligament hook to remove the posterior longitudinal ligament. It is more difficult, increases the operation time, and is likely to cause serious complications such as dura mater rupture, cerebrospinal fluid leakage, and even spinal cord injury leading to paralysis

There is currently no recognized surgical instrument on the market dedicated to resection of the posterior longitudinal ligament

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