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Positioning method of minimally invasive osseous surgery guiding channel

A technology of guiding channel and positioning method, which is applied in the directions of surgery, bone drill guidance, medical science, etc.

Inactive Publication Date: 2015-10-14
BONE MEDICAL TECH OF SUZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] During minimally invasive bone surgery, various instruments and screws (including fixation screws during pedicle surgery) usually enter the bone surgery site in the human body through a guide channel. Therefore, the position of the guide channel needs to be determined before the operation. In order to determine the position and direction of the guiding channel, multi-angle X-rays or whole-body CT scans and three-dimensional reconstructions are usually used to determine the location and direction of the guide channel. This method relies on multi-angle X-rays or CT for positioning. On the one hand, It will cause greater radiation to the patient's body; on the other hand, the doctor who performs this type of operation will be exposed to X-ray radiation for a long time, which is extremely harmful to the doctor's health

Method used

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  • Positioning method of minimally invasive osseous surgery guiding channel
  • Positioning method of minimally invasive osseous surgery guiding channel
  • Positioning method of minimally invasive osseous surgery guiding channel

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Embodiment 1

[0040] In this embodiment, the calculation of this method can be realized by Matlab software programming. Reference point O is the origin of the three-dimensional space, guide point A and guide point B are selected by the doctor, and extension points C and D are output to external instruments. There are two sets of coordinate systems in this method, one is the real three-dimensional coordinates (x, y, z), and the other is the coordinates (x1, z1, y1, z2) describing the pixel points of the anteroposterior and lateral X-ray photographs . Table 1 lists the data required in the program.

[0041] 1. By clicking, select reference point O, guide point A and guide point B, the data are shown in Table 1:

[0042] Table 1 Coordinate data

[0043]

[0044] 2. Calculate the three-dimensional coordinates of the guide point A and the guide point B according to the reference point O and the reference scale, the algorithm is as follows (assuming that the length l of the three-dimensiona...

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Abstract

The present invention discloses a positioning method of a minimally invasive osseous surgery guiding channel. The method comprises the steps of: (1) arranging a reference point and a reference scale which can be displayed in an X-ray photograph, and taking the X-ray photographs of an area for surgery including the reference point and the reference scale in two dimensions; (2) determining pixel point coordinates of two guiding points in each X-ray photograph according to X-ray photograph data including the reference point and the reference scale in the two photographs; and (3) computing three-dimensional coordinates of the two guiding points according to the taken X-ray photograph data, the reference point, the reference scale and guiding point data, and determining the position and direction of a straight line, that is the guiding channel, connected between the two guiding points. According to the method, the position and direction of the minimally invasive osseous surgery guiding channel can be rapidly determined, a patient only needs to take X-ray photographs for two times, continuous multi-angle X-ray photographs or three-dimensional CT reconstruction via whole-body scanning for determining the position and direction of the guiding channel are not required, and therefore radiation of X-ray or CT scanning on doctors or patients is reduced. The method is simple and practicable.

Description

technical field [0001] The invention relates to a positioning method, which is a positioning method of a guide channel for minimally invasive bone surgery. Background technique [0002] During minimally invasive bone surgery, various instruments and screws (including fixation screws during pedicle surgery) usually enter the bone surgery site in the human body through a guide channel. Therefore, the position of the guide channel needs to be determined before the operation. In order to determine the position and direction of the guide channel, multi-angle X-rays or whole-body CT scans and three-dimensional reconstructions are usually used to determine the location and direction of the guide channel. This method relies on multi-angle X-rays or CT for positioning. On the one hand, It causes greater radiation to the patient's body; on the other hand, the doctor who performs this type of operation is placed in the environment of X-ray radiation for a long time, which is extremely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/56A61B17/16A61B17/17A61B19/00
CPCA61B17/00234A61B17/1655A61B17/17A61B17/56
Inventor 罗宗平徐浩杨惠林
Owner BONE MEDICAL TECH OF SUZHOU CO LTD
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