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Opening navigator detection circuit for spinal surgery

A detection circuit and navigator technology, which is applied in the field of medical equipment, can solve problems such as detection circuits and methods that have not been reported, and achieve the effect of avoiding damage

Active Publication Date: 2012-09-19
上海朗信医学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, as simple as the present invention, a kind of detection circuit and method of perforation navigator for spinal surgery have not been reported.

Method used

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  • Opening navigator detection circuit for spinal surgery
  • Opening navigator detection circuit for spinal surgery
  • Opening navigator detection circuit for spinal surgery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] This embodiment realizes a detection circuit of a hole navigator for spinal surgery.

[0016] Such as figure 1 A structural schematic diagram of a detection circuit of a hole navigator for spinal surgery is shown. The navigator probe 1 is composed of an insulating band between the central electrode and the surrounding electrodes on the head, and the human tissue between the two electrodes acts as a conductive medium. According to the characteristics that the conductivity of spinal fluid is significantly greater than that of vertebrae. First, the embedded control system 3 prestores the current value range when both electrodes of the navigator probe 1 are located in the vertebrae and the central electrode is located in the spinal fluid. The embedded control system 3 provides a stable and continuous excitation voltage to the navigator probe 1 through the D / A converter 5 . After the navigator probe 1 enters the human body, the navigator probe 1 transmits the measured cur...

Embodiment 2

[0020] This embodiment implements a method for navigating holes for spinal surgery. The hardware circuit based on the implementation can be the detection circuit described in Embodiment 1, or other circuits constructed according to this method, such as based on computer or digital signal processing. A circuit or system built by a device.

[0021] An opening navigation method for spinal surgery, comprising the following steps:

[0022] Step 1: Output the excitation voltage to act on the two electrodes of the navigator probe;

[0023] Step 2: Convert the current signal output by the two electrodes of the navigator probe and output the voltage signal, perform impedance conversion, amplification, and filter processing, and then sample through A / D conversion;

[0024] Step 3: Comparing the A / D conversion sampling data with the data corresponding to the current value of the navigator probe located in the vertebrae and spinal fluid, so as to determine the position of the navigator p...

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PUM

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Abstract

The invention relates to an opening navigator detection circuit for a spinal surgery. The opening navigator detection circuit comprises a navigator probe, an excitation voltage module, an information processing module and an embedded control system, wherein the excitation voltage module outputs excitation voltage to act on two electrodes of the navigator probe; the two electrodes of the navigator probe output current signals and then output voltage signals through a current to voltage converter, and the voltage signals are processed through a preprocessing circuit, are then sampled through an analog to digital converter and are finally input to the embedded control system to be processed; and the embedded control system analyzes the size of input data and respectively compares the input data with pre-stored current value corresponding data of the navigator probe positioned in vertebra and spinal fluid, so that the position of the navigator probe is indicated. The opening navigator detection circuit navigates opening of the spinal surgery, and the injury caused by misplacement of vertebral screws is avoided. The invention also relates to an opening navigation method for the spinal surgery.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a detection circuit and method of a hole navigator for spinal surgery. Background technique [0002] At present, pedicle screw fixation therapy has been widely used in spinal surgery. The key to the success of transpedicular internal fixation surgery is whether the screw can be accurately screwed into the vertebral body through the pedicle. In order to ensure the safe implantation of screws, it is necessary to estimate the positioning of auxiliary medical devices, relying more on the doctor's feel and experience. This method has a high rate of screw misplacement, which may cause damage to the spinal cord and nerves, resulting in paralysis or functional impairment of the patient. [0003] Chinese patent 2010101145546, the patentee is Nanjing University of Aeronautics and Astronautics, discloses a near-infrared positioning and navigation device for pedicle screw implantation. But, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/053A61B17/90
Inventor 愈洪流王红霞刘同有
Owner 上海朗信医学科技有限公司
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