Auxiliary navigation device and method for full-view pedicle surgery based on bioelectrical impedance

Abstract

The invention discloses a full-view pedicle surgery navigation device and method based on bioelectrical impedance, which adopts a micro-electrode topological structure, and sets micro-electrodes at multiple positions in the circumferential direction of the drill bit. By setting two different micro-electrodes as driving electrodes, A current is applied to the detection target, and the remaining electrodes are combined in pairs and then set as measurement electrodes to extract the induced voltage of the detection target, so as to realize the real-time monitoring of the impedance of the tissue around the drill bit and the position of the drill bit during spinal surgery. The invention has the advantages of visualizing the pedicle screw implantation operation, more accurately judging the position of the screw channel, reducing the screw misplacement rate to the greatest extent, and avoiding multiple pushes and pulls of the drill bit in the traditional pedicle surgery. It saves operation time and improves the success rate of operation.

Description

technical field [0001] The invention belongs to the technical field of bio-impedance tomography, and specifically relates to a full-view pedicle auxiliary navigation device and method based on bio-electrical impedance. Background technique [0002] The use of pedicle screw fixation system to treat spinal fractures, tumors, deformities, various degenerative changes and other diseases is one of the important methods in spinal surgery. Establishing pedicle screw in the complex pedicle structure The channel is the prerequisite for pedicle screw implantation surgery, but since the structure of the pedicle cannot be viewed directly, the establishment of a pedicle screw access channel is basically a "blind operation", and the screw must be inserted from the only correct channel in space. Coupled with factors such as individual differences, deformities, and variations in the structure of the pedicle, it is difficult to accurately implant the pedicle screw. [0003] At present, the ...

AI Technical Summary

Problems solved by technology

This current loop method has a large current span, more tissue structures flowing through it, and a lot of interfering signals; coupled with individual differences and age factors, the measured results fluctuate greatly and the accuracy is not high

There are still some limitations to the PediGuard guide technology. The process of operating the PediGuard guide is to judge the type of tissue through the sound of the buzzer. Different doctors have certain differences in the judgment of the sound. In addition, the current loop only passes through a hole at the front end of the drill bit. Due to the extremely small local volume, only local small area tissues can be identified. Only when the drill bit almost touches or has touched the soft tissue in the pedicle, the system can give a more obvious alarm signal, resulting in repeated pushing and pulling of the opener during the operation. To a certain extent, the success rate of the operation is reduced and the operation time is prolonged.

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