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Three-dimensional coordinate-positioning drilling guiding system

A technology of three-dimensional coordinates and guidance system, applied in bone drill guidance, medical science, surgery, etc., can solve the problems of high price, long learning curve, complex structure of surgical navigation system, etc., achieve accurate drilling and avoid X-ray exposure , reduce the effect of X-ray exposure

Inactive Publication Date: 2012-06-13
王光明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the clinical work of orthopedics, it is often necessary to accurately and firmly fix the reduced fractures with screws, intramedullary nails, or Kirschner wires, so as to meet the "minimally invasive" treatment concept as much as possible. , collimators, and guides do not accurately adopt the method of three-dimensional coordinates, which cannot achieve the precise purpose. However, the surgical navigation system has a complex structure, high price, long learning curve, and accuracy needs to be improved.

Method used

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  • Three-dimensional coordinate-positioning drilling guiding system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: femoral neck fracture, reference Figure 4 .

[0036] After the fracture is reduced, the body surface locator is fixed on the ilium, the grid plate is placed in front of the hip joint, adjusted to make it horizontal, and perpendicular to the grid plate to take pictures or perspective.

[0037] According to the image, draw the position of the first guide pin, set A as the center point of the femoral head image, D as the target point, point C (reference point) where the guide pin intersects with the centerline of the long axis of the femur, and AB as A The vertical line from the point to CD, insert the thin needle vertically from the body surface projection point of point A, measure the distance from point A to the body surface projection point as h, and set the radius of the femoral head as r, then point D on the x1 axis vernier caliper The coordinate is AB, and the coordinate on the y-axis vernier caliper is r+h+positioning pin length L.

[0038] Insert ...

Embodiment 2

[0040] Example 2: positioning of femoral intramedullary nail insertion point, refer to Figure 5 .

[0041] Fix the body surface locator in front of the proximal femur, adjust the grid plate horizontally, and take pictures or see through the grid plate vertically.

[0042] like Figure 5 , as the centerline of the long axis of the femur, select two points AB, and insert the positioning needle vertically from the body surface projection points of the two points AB to the femoral surface, the coordinate of the center point of the cross-section of point A on the x1-axis vernier caliper is 0, and on the y-axis The coordinates on the vernier caliper are the lateral radius of the femur at point A plus the length L of the positioning pin, and the coordinates of the center point of the section at point B are determined similarly. Fix the positioning pins respectively, adjust and fix the vernier according to the coordinates, flex and adduct the hip joint, and drill the guide pins fro...

Embodiment 3

[0043] Embodiment 3: supracondylar fracture of humerus, reference Figure 6 .

[0044] After reduction, the body surface locator is fixed behind the elbow joint at the lower end of the humerus, and radiographs or perspectives are taken.

[0045] Select the target point at the proximal end of the fracture, as shown in point A in the figure. Let the thickness at point A be h (which can be measured on the lateral view). 1 / 3h plus positioning pin length and 2 / 3h plus positioning pin length. Insert the positioning needle vertically from the body surface projection point of point A, and drill the Kirschner wire from the lateral condyle and medial condyle respectively according to the coordinate adjustment.

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Abstract

The invention discloses a three-dimensional coordinate-positioning drilling guiding system. The guiding system comprises an x1 axis vernier caliper and an x2 axis vernier caliper arranged along an axis x, an axis z vernier caliper arranged along an axis z, an axis y vernier caliper arranged along an axis y, positioning needle fixers arranged on the x1 axis and the x2 axis, and a guide needle fixer on the axis Y, wherein the x2 axis vernier caliper and the x1 axis vernier caliper are parallel to each other. After fracture reposition, a body surface positioner is mounted on bones, projections of a target point and a reference point on the body surface are positioned by X-ray; the positioning needles are inserted in vertically to respectively confirm the coordinates of the target point and the reference point on the three-dimensional positioning rack x1 axis, x2 axis, and axis y relative to positioning needle points; the verniers on each axis can be regulated and fixed based on the coordinates; and drill bits and Kirschner wires are drilled in from the guide needle fixer. The guiding system has the advantages that application range is wide, drilling is accurate, and the drill bit or the Kirschner wire can be in optional size below 6mm.

Description

technical field [0001] The invention relates to a medical device, in particular to a three-dimensional coordinate positioning drilling guide system used in orthopedic surgery. Background technique [0002] In the clinical work of orthopedics, it is often necessary to accurately and firmly fix the reduced fractures with screws, intramedullary nails, or Kirschner wires, so as to meet the "minimally invasive" treatment concept as much as possible. , aiming device, and guiding device do not accurately adopt the method of three-dimensional coordinates, and the precise purpose cannot be achieved. However, the surgical navigation system has a complex structure, is expensive, has a long learning curve, and its accuracy needs to be improved. Contents of the invention [0003] Aiming at important tissue damage caused by inaccurate drilling position during related operations or inaccurate internal fixation position leading to unstable fixation and failure, which increases the risk of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/17A61B19/00
Inventor 王光明
Owner 王光明
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