External fixing rack gradually pulling device and method for treating stiff knee

A technology of external fixator and pulling device, which is applied in the field of orthopedic treatment of knee stiffness, and can solve the problems of soft tissue necrosis, poor treatment effect of knee stiffness, poor treatment effect, etc.

Inactive Publication Date: 2009-05-27
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1) Knee joint manipulation loosening and functional exercise: early application has a good preventive effect on knee joint stiffness, and can also play a good role in improving mild knee joint stiffness; Stiffness has no obvious effect, and even when the strong manipulation is loosened, it often causes femoral shaft fracture or patellar tendon rupture (Magit D, Wolff A, Sutton K, et al. Arthrofibrosis of the knee. J Am Acad Orthop Surg. 2007; 15(11) : 682-694.)
Among them, the use of "electric knee mobilizers" for knee joint functional exercise can only play a preventive role, but has no therapeutic effect
[0004] 2) Gradually pressurize the knee flexion brace: (1) The therapeutic effect on severe knee joint stiffness is poor; (2) Long-term strong compression of the skin, muscles and other soft tissues of the thigh and calf may easily lead to local skin and muscle necrosis; (3) ) The treatment process is unbearably painful for the patient and cannot be tolerated, which often leads to interruption or abandonment of the treatment; (4) Even if you persist, the final result often easily leads to knee joint flexion, contracture and stiffness
(2) The treatment effect is poor: the expected degree of flexion is often not achieved during the operation; in addition, femoral shaft fractures or patellar tendon ruptures are also prone to occur when the manipulation is loosened after intraoperative release; Recurrent adhesions lead to the loss of some or most of the improved flexion during the operation. At present, prevention of re-adhesion after knee joint release is a long-term problem that has plagued the orthopedic community (Alexnder Creighton, BernadR.Bach.Arthrofibrosis: Evaluation, Prevention, and Treatment . Techniques in knee Surgery. 2005; 4(3): 163-172)
[0006] 4) Minimally invasive knee arthroscopic release surgery: Although this surgery has a small trauma and has a certain effect on knee stiffness with mild intra-articular adhesions, it is not effective for a large number of severe knee joints with extra-articular quadriceps adhesions. Joint stiffness has no obvious effect (Wang JH, Zhao JZ, He YH. A new treatment strategy for severe arthritis of the knee. Surgical technique. J Bone Joint Surg Am. 2007; Mar; 89 Suppl 2 Pt.1: 93-102)

Method used

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  • External fixing rack gradually pulling device and method for treating stiff knee
  • External fixing rack gradually pulling device and method for treating stiff knee
  • External fixing rack gradually pulling device and method for treating stiff knee

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1, see figure 1 , this embodiment includes a bilateral planar calf external fixator 1 installed on both sides of the calf close to the full length of the tibia, a bilateral planar thigh external fixator 2 installed on both sides of the thigh close to the full length of the femur, and a distal end of the calf external fixator 1 A half-ring 3 is connected to the back side, and a half-ring 4 is connected to the dorsal side of the proximal end of the external fixation frame 2 of the thigh. The external fixation frame 2 of the thigh is placed and fixed on the wedge-shaped bracket 7 through four pipe clamps 8, and the lower leg is suspended in the air at the same time. Connect a steel cable tightener 6 at the calf half-ring 3 central part, the free end of the steel cable of this steel cable tightener 6 pulls out and walks around the pulley 9 at the center of the far side metal pipe on the bottom surface of the wedge-shaped bracket 7, and is fixed on after returning On...

Embodiment 2

[0041] Example 2, see figure 2 , this embodiment includes a bilateral planar calf external fixator 1 installed on both sides of the calf close to the full length of the tibia, a bilateral planar thigh external fixator 2 installed on both sides of the thigh close to the full length of the femur, and a distal back of the calf external fixator 1 A half-ring 3 is connected to the side, a half-ring 4 is connected to the back side of the proximal end of the thigh external fixator 2, a cable tightener 6 is installed at the central part of the calf half-ring 3, and a pulley 5 is installed at the central part of the thigh half-ring 4, The free end of the steel cable of the steel cable tightener 6 of shank half ring 3 is pulled out the pulley 5 that directly walks around thigh half ring 4, and is fixed on the shell of steel cable tightener 6 after returning.

[0042] The progressive pulling method is as follows:

[0043] 1) Install the external fixator: Install bilateral planar extern...

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Abstract

The invention relates to an external fixing frame gradual traction device for remedying knee joint stiffness and a method thereof. The invention uses the action theory of a lever, a cable and a pulley for slow and gradual retrenching traction on the far end of a crus by an external fixing frame and a cable to ensure that the crus bends gradually by taking the knee joint as a shaft along with the time, so as to achieve the goal that the bending action range of the knee joint is increased gradually. The method comprises the concrete steps as follows: 1) the external fixing frames are arranged on the thigh and the crus; 2) the external fixing frame of the thigh is fixed on a wedge bracket to hang the crus; 3) a steel cable system is arranged to draw the far end of the external fixing frame of the crus; 4) the steel cable is retrenched for multiple times every day to ensure that the steel cable pulls the crus to bend passively by taking the knee joint as the shaft, so as to increase the bending degree of the knee joint gradually; and 5) when the bending degree of the knee joint is increased by 15 to 30 degrees, the cable is released to carry out the active action and the passive action of the knee joint, solidify the action degree of the knee joint and avoid the bending stiffness of the knee joint. The method overcomes the disadvantage that the knee joint lysis has large injury and bad effect, and the method is the ideal method for improving the knee joint function practically.

Description

technical field [0001] The invention relates to the field of orthopedic treatment for knee joint stiffness, in particular to an external fixator progressively pulling through an external fixator, pulleys and cables to passively increase the degree of knee flexion to achieve minimally invasive and effective treatment of knee joint stiffness Pulling device and method. Background technique [0002] Knee stiffness is a common complication after plaster fixation of lower extremity fractures or bone and soft tissue surgery around the knee joint (Wang JH, Zhao JZ, He YH.A New Treatment Strategy for Severe Arthrofibrosis of the Knee.J Bone Joint Surg(Am).2006 ;88:1245-1250). The mechanism of its occurrence is mainly caused by the scar fibrotic adhesion in the knee joint and the scar fibrotic adhesion between the quadriceps femoris muscle and the distal femoral shaft outside the joint (Bosch U. Arthrofibrosis. Orthopade. 2002 Aug; 31 (8): 785-790). At present, the main treatment me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F5/045
Inventor 袁志刘建裴国献穆尚强黄哲元刘建敏李鹏斌
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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