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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

Inactive Publication Date: 2008-08-06
THE FIRST AFFILIATED HOSPITAL OF THIRD MILITARY MEDICAL UNIVERSITY OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prior art still has the following problems: 1. The fine-tuning scale is difficult to identify because of its small size and is easily covered by stains.
2. The adjustment process still needs to be completed manually, which cannot solve the problem of asynchronous adjustment nuts
3. The operator’s subjective influence cannot be avoided, causing patients to suffer and reducing work efficiency
Severe cases can also cause common complications such as angulation deformity, and secondary surgical correction not only greatly aggravates the pain of the patient, but also increases the financial burden of the patient, affecting the efficiency and success rate of the operation

Method used

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Embodiment Construction

[0020] Fig. 1 is a schematic structural diagram of the present invention, and Fig. 2 is a schematic view of the ratchet and ratchet rod driving structure viewed from the direction A of Fig. 1, as shown in the figure: the automatic adjustment orthopedic external fixation device of the present invention includes three fixing rings 1 , Respectively fixed ring I 11, fixed ring II 12 and fixed ring III 13; the fixed ring I 11 and the fixed ring II 12 are connected by three support rods 7 evenly distributed on the circumference, the fixed ring II 12 and the fixed ring The rings III 13 are connected by three support rods 71 ​​evenly distributed on the circumference. The support rod 7 between the fixed ring I 11 and the fixed ring II 12 and the support rod 71 between the fixed ring II 12 and the fixed ring III 13 are in Staggered in the circumferential direction to avoid interference between the upper and lower support rods and facilitate adjustment; the adjustment nut 8 used to adjust th...

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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.

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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Application Information

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IPC IPC(8): A61B17/60A61B17/62A61B17/64
Inventor 罗阳府伟灵张雪
Owner THE FIRST AFFILIATED HOSPITAL OF THIRD MILITARY MEDICAL UNIVERSITY OF PLA
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