Non-invasive telescopic false body

A prosthesis and permanent magnet technology, applied in the field of artificial prosthesis medical equipment, can solve the problems of high treatment failure rate, high patient pain, high infection risk, etc., to avoid infection risk, solve limb unequal length, and reverse efficiency. low effect

Active Publication Date: 2011-08-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems that the elongation of the prosthesis in the prior art needs to be performed by surgical methods, and several operations bring great pain to the patient, heavy economic burden, high risk of infection, high probability of treatment failure, etc., and provides a non-invasive prosthesis. extendable prosthesis

Method used

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  • Non-invasive telescopic false body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A non-invasive stretchable prosthesis whose mechanical structure is as follows figure 1 shown. The non-invasive extensible prosthesis includes a main body structure composed of an inner sleeve 1 and an outer sleeve 2, the outer sleeve 2 is set outside the inner sleeve 1, and the outer sleeve 2 can move along the The axial relative sliding of the inner sleeve 1 only allows relative axial movement;

[0037] The main structure of the prosthesis is composed of an inner sleeve 1 and an outer sleeve 2. The inner wall of the outer sleeve has transmission threads, and the small-diameter cylindrical surface of the thread and the outer surface of the inner sleeve form a clearance fit to withstand the bending load from the joint or bone; There are 6 radial protrusions on the outer surface of the sleeve, which form a form-surface fit with 6 grooves on the inner wall of the outer sleeve to transmit the torsional load from the joint or bone; the outer sleeve can slide freely along t...

Embodiment 2

[0054] Except that the inner sleeve 1 and the outer sleeve 2 are socketed together through the spline structure, the rest is the same as the embodiment 1.

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PUM

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Abstract

The invention discloses a non-invasive telescopic false body belonging to the field of artificial false body medical devices. An in-vitro driving power supply is used for generating an alternating voltage to drive a primary coil to generate an alternating magnetic field, induced electromotive force is generated on an in-vivo secondary coil in an electromagnetic induction mode to drive a motor in the false body to rotate, the motor slows down by a speed reducer driven through a coupler, passes through a driving ring and then enables the false body to lengthen through threaded drive. In the electromagnetic driving mode, the lengthened false body does not need any operational incision operation and fully avoids operational infection risk, and a permanent magnet coupling can fully and plastically package the motor (including other electric appliance elements) and solve the sealing problem. While transferring power needed by a lengthening action, a driving ring device fully isolates an external load and internal power structure so that the false body can bear a physiological load by a sleeve structure and the reliability of the false body is improved.

Description

technical field [0001] The invention belongs to the technical field of artificial prosthesis medical equipment, and relates to a non-invasive extensible prosthesis, which is especially suitable for the artificial prosthesis of long bones of limbs to reconstruct defective bones. Background technique [0002] Since the 1970s, extensive limb salvage operations have been carried out for malignant bone tumors in the extremities, and artificial prostheses have been used to reconstruct bone defects. At present, artificial prosthesis replacement has been widely carried out in the treatment of malignant bone tumors, and the 5-year survival rate reaches or exceeds 50%, which is an effective treatment plan. [0003] For patients with immature bone tumors (including patients with other bone diseases) who undergo artificial prosthesis replacement, there will be unequal lengths of bilateral limbs due to bone growth of the healthy limb after surgery, which will affect the quality of life o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/56A61F2/62A61F2/70
Inventor 郝智秀王昊森
Owner TSINGHUA UNIV
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