Intervertebral expander for TLIF (Transforaminal Lumbar Interbody Fusion) surgical channel

Abstract

The invention discloses an intervertebral expander for a TLIF (Transforaminal Lumbar Interbody Fusion) surgical channel, and relates to the technical field of medical instruments. The intervertebral expander for the TLIF surgical channel is provided with an expanding gear rack, wherein the expanding gear rack is provided with two expanding arms; at least one expanding arm can longitudinally slide along the expanding gear rack; the expanding arm which can be longitudinally slid along the expanding gear rack is provided with a non-return pawl which cooperates with the expanding gear rack; the two expanding arms are provided respectively with a vertebral pedicle screw sleeve which is used for being connected with a vertebral pedicle screw; the expanding gear rack between the two expanding arms is provided with a traction base; the traction base is provided with a sliding hole; traction screw rods are arranged in the sliding hole; the traction screw rod at the back side of the traction base is provided with a traction nut; the front part of the traction screw rod at the front side of the traction base is provided with a traction hook plate. The intervertebral expander for the TLIF surgical channel is simple in structure and is convenient to use; surgical operation is not influenced; the firm surgical channel can be quickly established.

Description

technical field [0001] The invention relates to the technical field of medical appliances, in detail, it is a TLIF surgical channel intervertebral distractor that is simple in structure, easy to use, does not affect the surgical operation, and can quickly establish the surgical channel. Background technique [0002] We know that decompression, fixation, and fusion are the three principles of spinal internal fixation surgery. Intraoperative decompression and intervertebral treatment operations need to fully expose the decompression area as much as possible to stabilize the upper and lower vertebral bodies. At present, the clinical preoperative channel establishment method is: implant pedicle screws on the vertebral body that needs to be expanded, install connecting rods on the pedicle screws, and use distracting forceps to apply force through the connecting rods to support the vertebral body. Open, use top wire to fix; achieve the purpose of vertebral body distraction and sta...

AI Technical Summary

Problems solved by technology

It has the following disadvantages: the connecting rod just blocks the surgical operation area, which affects the surgical operation, it is difficult to operate completely outside the nerve root, it is easy to cause damage to the cauda equina of the nerve root, and it is difficult to implant the fusion device

The top wire and pedicle screw need to be locked repeatedly, which is easy to damage the top wire and pedicle screw of the implant, and thus easily cause damage to the patient; it is impossible to establish a channel for minimally invasive operation of small incision; the skin and soft tissue at the incision need to use other The appliance is pulled and stretched, and the operation is troublesome, time-consuming and labor-intensive

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