Pelvic fracture front ring fixing detachable screw and internal fixing device

Abstract

The invention provides a pelvic fracture front ring fixing detachable screw and an internal fixing device.The pelvic fracture front ring fixing detachable screw comprises a main screw, a screw barrel and a limiting mechanism; the through hole in the nail barrel is step-shaped; a nail head of the main nail is arranged in the nail barrel, a nail rod of the main nail penetrates out of the through hole, and the limiting mechanism is detachably connected into the nail barrel and used for limiting rotation of the main nail; when the pelvic fracture front ring fixing detachable screw is detached, the limiting mechanism is separated from the through hole, and the main nail is separated from the nail barrel after rotating by a preset angle. The internal fixing device comprises a connecting cross rod and at least two detachable screws for fixing the pelvic fracture front ring. The pelvic fracture front ring fixing detachable screws are connected through a connecting cross rod. By means of the internal fixing frame, the problem that in the prior art, for a patient provided with an internal fixing frame, other parts outside a main screw body of a screw are difficult to take out is solved, and then the postoperative discomfort of the patient can be reduced on the premise that the main screw body is reserved.

Description

technical field [0001] The invention relates to the technical field of orthopedic medical devices, in particular to a detachable screw and an internal fixation device for fixing an anterior ring of a pelvic fracture. Background technique [0002] For the fragile anterior pelvic ring injury in the elderly, minimally invasive anterior pelvic ring internal fixation (Minimally Invasive Anterior Pelvic Ring Internal Fixator) is generally used clinically. The most widely used and most effective device in this operation is called internal fixation frame (INFIX). The original design of the internal fixator is to stabilize the anterior pelvic ring, so injuries to the anterior pelvic ring, including separation of the pubic symphysis and fractures of the pubic ramus, are its best indications. Because the internal fixator is located in front of the lower abdomen and pelvis, thin patients will experience subjective discomfort, especially for the upright posture. After surgery, subjectiv...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a detachable screw and internal fixation device for pelvic fracture anterior ring fixation, to solve the problem in the prior art that it is difficult to take out the rest of the screw and the main nail for patients who have installed the internal fixation frame

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