Self-adjusting orthopaedics external fixing device

An automatic adjustment and external fixation technology, applied in the field of medical devices, can solve problems such as affecting the operation efficiency and success rate, unable to solve multiple adjustment nuts, increasing the economic burden of patients, etc., to avoid subjectivity and blindness, and ensure bone lengthening. process, pain relief
CN101234036AInactive Publication Date: 2008-08-06THE FIRST AFFILIATED HOSPITAL OF THIRD MILITARY MEDICAL UNIVERSITY OF PLA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
THE FIRST AFFILIATED HOSPITAL OF THIRD MILITARY MEDICAL UNIVERSITY OF PLA
Publication Date
2008-08-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a self-adjusting orthopedic external fixator which comprises at least two fixing rings, a knighthead, an adjusting nuts positioned on the knighthead and used for fixing and adjusting the distance between the two retainers, a Kirschner wire, a thread needle fixture and a pressure sensor positioned on the knighthead as well as a driving system and a PLC automatic control system which are corresponding to the adjusting nuts; wherein, the driving system adopts a ratchet, a ratchet rod and a gear structure. The self-adjusting orthopedic external fixator of the invention controls and adjusts the relative position between the two retainers automatically, avoids errors caused by manual manipulation, ensures that all knightheads are uniformly forced and avoids deviation caused by disequilibrium of the knightheads; besides, the self-adjusting orthopedic external fixator has convenient operation, thus ensuring that the processes of fracture healing and bone lengthening are operated smoothly to improve efficiency and success rate of operation and alleviate the suffering of the sufferer.
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Description

Technical field

[0001] The invention relates to a medical instrument for orthopedic surgery, in particular to an automatically adjusted orthopedic external fixation device. Background technique

[0002] Limb lengthening uses the principle of distraction osteogenesis to artificially extend bone tissue to reach a predetermined length. Traditional limb lengthening uses the Ilizarov ring-shaped external fixator (US Patent US4978348), which includes a ring and a needle. The external fixation includes 4 rings and 4 vertical rings placed horizontally from top to bottom. Support rods, each support rod connects 4 rings to make them relatively fixed. Each ring plane is fixed with two piercing needles penetrating the bone, and the piercing needles are clamped on the ring by a fixing nut. The external fixator is fixed on the limb that needs to be lengthened, and then the bone is cut at a specific position. When the length is needed, the relative position of the rings on both sides of the bon...

Claims

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