Intraoperative navigation system used for implanting pedicle screw

Abstract

The invention discloses an intraoperative navigation system used for implanting a pedicle screw. The intraoperative navigation system comprises a multifunctional drill bit, a near-infrared parameter collecting device, an electromagnetic positioning device and a computer, wherein the electromagnetic positioning device comprises a magnetic field generator and an electromagnetic position indicator which are connected through a cable, and the electromagnetic position indicator is also connected with the computer; the multifunctional drill bit comprises a threaded sleeve, a receiving fiber, a launching fiber, an electromagnetic positioning coil, an inner stainless steel pipe, an outer stainless steel pipe and a handle, and the receiving fiber, the launching fiber and the electromagnetic positioning coil are parallelly and are closely arranged in the inner stainless steel pipe; the electromagnetic positioning coil is connected with the electromagnetic position indicator, and the receiving fiber and the launching fiber are respectively connected with a light source output interface and a light source input interface of the near-infrared parameter collecting device; and the near-infrared parameter collecting device is connected with the computer. The intraoperative navigation system provided by the invention has the advantages that the operation is simple, the navigation system is effective in real time, the implanting position, direction and depth of the pedicle screw can be monitored in real time, and early warning can be achieved when the screw is implanted in a deflection manner or reaches a boundary.

Description

technical field [0001] The invention belongs to the field of medical devices, and relates to an intraoperative navigation system for pedicle screw implantation in orthopedic surgery, in particular to an intraoperative navigation system for pedicle screw implantation combined with near-infrared, electromagnetic positioning and CT images and its working methods. Background technique [0002] The internal fixation of the spine based on the implantation of pedicle screws (Pedicle Screw, PS) is a stick-type internal fixation method composed of pedicle screws to stabilize the spinal structure, so as to promote the fusion and rehabilitation of diseased segments, and has a good effect. , short cycle, quick effect and other advantages, it has been widely used clinically to treat spinal deformity, spinal trauma, spondylolisthesis and various degenerative disc diseases. Surgery needs to determine the ideal implantation point, implantation direction and implantation depth on the verteb...

AI Technical Summary

Problems solved by technology

X-rays can be projected in frontal, lateral or other positions, but cannot be used for transverse imaging, and at the same time, there are occlusions in the anterior and posterior anatomical structures of the pedicles

Intraoperative evoked potential method, if EMG changes have been monitored, nerve damage may have occurred, and this technique cannot perform continuous intraoperative monitoring, and at the same time cannot intuitively understand the direction and position of PS

However, the navigation system for spinal surgery is expensive and complicated to operate. The registration system requires precise positioning. Once positioned, it cannot be moved, otherwise it will seriously affect the accuracy of pedicle screw placement.

The application of CT needs to acquire images before the operation and match them during the operation, which cannot be completely real-time

Tissue conductivity can only obtain the information of the impending puncture site, but cannot judge the spatial relationship between the screw, the vertebral body and the pedicle, and the difference in the conductivity of the vertebral tissue along the puncture path is small

Near-infrared positioning and navigation can obtain the optical parameters on the needle track of the vertebral tissue in real time, but cannot obtain the spatial position, direction, implantation depth and other information of the screw

[0004] Through the above analysis, there is currently no effective monitoring system for pedicle screw implantation, which needs to be further improved

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