A minimally invasive surgical instrument using a peek connecting rod

Abstract

The invention discloses a minimally invasive surgical instrument using a PEEK connecting rod. The minimally invasive surgical instrument includes a connecting rod and a rod holder used in conjunction with the connecting rod. The connecting rod includes a connecting rod head, a connecting rod body and a connecting rod connected in sequence. The joint, the head of the connecting rod is in the shape of a cone, the body of the connecting rod is made of PEEK material, and the joint is in the shape of a cylinder. The connecting rod body is made of PEEK, which has a high fusion rate with human bones, slows down the degeneration of the adjacent stage of the fusion gap, and is not easy to rub against other fixing systems. The PEEK material rod body is pre-bent, which conforms to the physiological curvature of the lumbar spine; the connecting rod head The joints and joints are all made of TC4, so that the head of the connecting rod and the joint can be visualized and positioned under X-ray during minimally invasive surgery, and it is more convenient to use the connecting rod.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a minimally invasive surgical instrument using a PEEK connecting rod. Background technique [0002] Spinal screw rod internal fixation is one of the operations for bone reduction and fixation. In open surgery, the connecting rod is put into the U-shaped groove of the pedicle screw cap through the rod holder. [0003] With the development of medical technology, minimally invasive technology has been developed in spinal surgery. Compared with open surgery, minimally invasive surgery has small surgical wounds, less injury and pain, shorter postoperative recovery time, and faster recovery. , the amount of bleeding is small, and the risk of secondary injury during the operation is low. [0004] At present, the use process of the existing rod holder is cumbersome and difficult to put the rod. The fusion rate of the connecting rod and bone made of traditional materials is not high, a...

AI Technical Summary

Problems solved by technology

[0004] At present, the use process of the existing rod holder is cumbersome and difficult to put the rod. The fusion rate of the connecting rod and bone made of traditional materials is not high, and the adjacent stage of the fusion gap is prone to degeneration. The connecting rod is prone to friction with other fixing systems, resulting in low back pain. Moreover, the connecting rod made of traditional materials is bent according to clinical experience during the operation, and the curvature is inconsistent and does not conform to the physiological curvature of the lumbar spine, resulting in increased local stress and low back pain.

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