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Computer Aided Interlocking Intramedullary Nail Distal Locking System

A computer-aided, locking system technology, applied to internal fixators, surgical navigation systems, fixators, etc., can solve the problems of cumbersome operation, need to improve accuracy, complex structure, etc.

Inactive Publication Date: 2018-07-31
王光明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The use of interlocking intramedullary nails after long bone fractures of the limbs has the advantages of minimal invasiveness, reliable fixation, and early mobilization, but it is often difficult to lock the distal end during clinical use.
The existing distal locking methods are: manual locking, mechanical sight, magnetic navigation, computer-aided navigation and other methods, but these methods have not fundamentally solved this problem: patients and doctors have to accept a large number of X-ray irradiation , causing great harm to doctors and patients; if the positioning rod of the mechanical sight cannot be positioned when the intramedullary nail is deformed in the coronal plane, the accuracy is not high; magnetic navigation is only suitable for hollow intramedullary nails, and the price is expensive; and the existing computer Auxiliary navigation systems such as patent numbers CN02158691.8 and CN200410013630.9 have complex structures, cumbersome operations, and the accuracy needs to be improved

Method used

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  • Computer Aided Interlocking Intramedullary Nail Distal Locking System
  • Computer Aided Interlocking Intramedullary Nail Distal Locking System
  • Computer Aided Interlocking Intramedullary Nail Distal Locking System

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 Shown is a schematic structural view of the computer-aided interlocking intramedullary nail distal locking system of the present invention; figure 2 Shown is the standard lateral view of the computer-aided interlocking intramedullary nail distal locking system of the present invention in a C-arm X-ray machine; image 3 Shown is the plane coordinate system constructed in the image measurement software of the computer-aided interlocking intramedullary nail distal locking system of the present invention; a computer-aided interlocking intramedullary nail distal locking system of the present invention includes a handle 1 and a handle 1 An intramedullary nail 2 fixedly connected at one end and a guide rod 3 fixedly connected with the other end of the handle 1, the distal end of the intramedullary nail 2 away from the handle is provided with a locking hole 5, and the guide rod 3 is provided with a sleeve mounting seat 16. The sleeve mounting seat 16 is prov...

Embodiment 2

[0031]The difference between this embodiment and Embodiment 1 is that the positioning device includes a positioning plate 10a vertically arranged above the locking hole 5, and the side of the positioning plate 10a is provided with a mark with a fixed distance and used for image calibration and measurement. The mark is set as a positioning line 11a, and the positioning line 11a includes no less than 2 horizontal lines arranged in parallel up and down, and the distance between adjacent horizontal lines is set to 4mm or 5mm. In this embodiment, the structure is provided with no less than 2 The horizontal line set parallel to the top and bottom is convenient for the image measurement software to perform accurate calculation and establish a coordinate system, especially when the intramedullary nail is shifted back and forth in the bone, the needle tip on the positioning board and the intramedullary nail are not on the same plane, and imaging There will be a viewing angle error. Meas...

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Abstract

The invention discloses a computer-assisted interlocking intramedullary nail distal locking system. The system comprises a handle, an intramedullary nail and a guide bar, wherein locking holes are formed in the intramedullary nail; a sleeve mounting seat is arranged on the guide bar; sleeve guiding holes are formed in the sleeve mounting seat; a positioning device is arranged on the guide bar and comprises a positioning pin or a positioning plate, and marks which are arranged at fixed distance and can be used for calibrating and measuring images are arranged on the positioning pin or the positioning plate; after the positioning pin or the positioning plate is mounted, a distal standard side image is acquired by a C-arm X-ray machine, the image is guided into a computer and then is calibrated by image measuring software according to the fixed distance on the positioning device, a plane-coordinate system is established by taking a mark point closest to the intramedullary nail as an original point and a vertical direction as a Y axis, coordinates of the two distal locking holes of the intramedullary nail in the plane-coordinate system are measured, positions of a horizontal vernier main scale and a vertical vernier main scale are adjusted, distal locking of the intramedullary nail can be completed with a conventional method, precise control is realized, and the precision can reach 0.02 mm.

Description

technical field [0001] The invention belongs to the technical field of a device or method for treating bones or joints and special equipment thereof, and in particular relates to a computer-aided interlocking intramedullary nail distal locking system. Background technique [0002] The use of interlocking intramedullary nails for long bone fractures of limbs has the advantages of minimal invasiveness, reliable fixation, and early mobilization. However, it is often difficult to lock the distal end during clinical use. The existing distal locking methods are: manual locking, mechanical sight, magnetic navigation, computer-aided navigation and other methods, but these methods have not fundamentally solved this problem: patients and doctors have to accept a large number of X-ray irradiation , causing great harm to doctors and patients; if the positioning rod of the mechanical sight cannot be positioned when the intramedullary nail is deformed in the coronal plane, the accuracy is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/72A61B17/92A61B34/20
CPCA61B17/7241A61B17/725A61B17/921A61B2017/564
Inventor 王乐王光明
Owner 王光明