RU2126232C1 - Device for reposition and fixation of pelvis bone fractures - Google Patents

Abstract

FIELD: medical engineering. SUBSTANCE: device has body and reposition assemblies. The device body is made in the form of two upper and lower half-rings coupled to each other. Flexible member which excludes shifting of splinters after reposition and fixation is installed in upper half-ring. Fixing screws are arranged in lower half-ring for moving over half-ring circumference. EFFECT: enhanced efficiency, reduced traumatic injuries, shortened time of rehabilitation. 3 dwg

Description

 The invention relates to medical equipment and is used to reposition bone fragments in case of fractures of the human pelvic ring.

 A device for a similar purpose / 1 / is known, containing a frame made in the form of two half-brackets, with racks with threaded rods installed in them. The disadvantages of this device are the presence in the design of the racks of the ball bearings, as well as the installation of the racks in the figured grooves by means of barrel-shaped bushings, which complicates the manufacturing technology and does not provide sufficient rigidity of the device.

 To eliminate the above disadvantages of this invention is directed.

 In FIG. 1 shows a main view of a device for reposition and fixation of pelvic fractures. In FIG. 2 is a section BB in FIG. 1; in FIG. 3 is a view A in FIG. 1.

 The locking device for reposition and fixation of pelvic fractures (Fig. 1) has a body in the form of two upper 5 lower 3 half rings connected by bolts 4. The lower half ring 3 contains fixing screws 2 (section BB) installed in the guide grooves (type A ) and having the ability to move, locked with nuts 1.

 The upper part of the device is an upper half-ring 5, having a screw 9 in a diametrically vertical plane, which acts on an elastic element 7 located inside the half-ring, moving along the guides 8, as well as screws 6 acting on the ends of the elastic element to change the distance between them.

 The device operates as follows.

 The lower half-ring 3 is brought under the patient’s body from the back. After the initial reposition of the fragments, the fixing screws 2 are screwed into contact with the bone tissue of the pelvis. Then, the upper half ring 5 is fastened to the lower half ring 3 by bolts 4, after which the ends of the elastic element 7 are installed by means of screws B in the direction of the wings of the pelvis. By turning the screw 9, the elastic element 7 is brought into contact with the patient's body with the necessary effort. After creating preliminary fixation by coordinated movement of the fixing screws 2, screws 6 and 9, the final fixation of the fragments of the pelvic bones is carried out, after which the position of the fixing screws 2 is fixed by nuts 1.

 The design of the device for reposition and fixation of fractures of the pelvic bones allows to provide the required accuracy of reposition and reliability of fixation of fragments by an elastic element 7 located in the upper half ring 5.

 The device does not contain technologically complex parts and does not require special equipment in the manufacture.

 Information sources.

 1. USSR author's certificate N 1258400, A 61 B 17/58.

Claims (1)

 A device for reposition and fixation of the pelvic bones, comprising a body and reposition nodes, characterized in that the body is made in the form of two connected upper and lower half rings, an elastic element is installed in the upper half ring to prevent displacement of fragments after reposition and fixation, and fixing brackets are placed in the lower half ring screws with the ability to move around the circumference of a semicircle.

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