Withdrawable fixing device for postoperative skull and other osseous tissue

Abstract

The invention relates to a demountable fixing device suitable for postoperative skull and other osseous tissues which includes a lower lock blade, an upper lock blade and a vertical sliding rod. The invention is characterized in that the upper surface of the lower lock blade is provided with an adjusting post and the center of the adjusting post is provided with a screw hole; the surface of the adjusting post is provided with an external locking structure; the lower surface of the upper lock blade is provided with an adjusting barrel and an inner wall of the adjusting barrel is provided with an internal locking structure cooperated with the external locking structure of the surface of the adjusting post on the upper surface of the lower lock blade. The lower end of the vertical sliding rod is provided with an external screw thread; the vertical sliding rod passes through the adjusting barrel on the lower surface of the upper lock blade and is cooperated with the screw hole at the center of the adjusting post on the upper surface of the lock blade. The invention has the advantages of greatly reducing the risk of a secondary skull digging operation, reliable fixation, fast, simple and convenient mounting and demounting, not needing to cut the rest length of a connecting rod, being not able to result in friction damage on a scalp and being beneficial to postoperative concrescence.

Description

technical field [0001] The invention relates to a medical device, in particular to a detachable fixation device suitable for postoperative skull and other bone tissues. Background technique [0002] Traditional postoperative cranial fixation uses sutures or special screws to fix the skull. And modern craniotomy is to drill a plurality of holes on the skull earlier, and then, carry out circular incision surgery to the skull between the two holes. Obviously, the traditional way of cranial fixation is not suitable for the fixation of the mobile skull after modern craniotomy. At present, there are various forms of postoperative cranial fixation devices, such as the invention patent titled "Cranial Postoperative Ring Fixation Device" announced by CN 1229081C; It is combined with the adjusting tie bar; an upper fixing piece has a through hole which can pass through the adjusting tie bar, and is combined with the adjusting tie bar by a combination mechanism to form a sliding comb...

AI Technical Summary

Problems solved by technology

However, these skull lock devices have disadvantages: they adopt a locking mechanism that is easy to advance and difficult to retreat. It is difficult to adjust the locking force, and it is easy to damage the skull. The risk of surgery; more auxiliary tools are needed for installation, and the remaining length of the connecting rod must be cut with special clamps, and the uneven cutting will cause scalp friction damage and suppuration, which will affect postoperative healing

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