SU1243713A1 - Arrangement for reposition and compression of bone fragments of kneecap - Google Patents

Description

The invention relates to medical technology, namely to traumatology and orthopedics.

The aim of the invention is to provide lateral reposition of fragments and longitudinal reposition of each of them.

FIG. 1 shows a device for reposition and compression of the patellar bone patches, general view; in fig. 2 - knee vice; in fig. 3 - a fragment of the device on an enlarged scale; in fig. 4 shows section A-A in FIG. 3

The device consists of a knee vice containing a screw 2 with multidirectional threads, on which axles 3 are mounted, fixed on the forked end of branch 4. Branches 4 are in turn pivotally fixed on the base of knee vice 1 by means of axes 5. Support platforms 6 are located on branches 4 , freely moving along the branches 4. To the base of the knee vice 1 there is fixedly attached a separable arc consisting of two half-shelves 7 and 8, which are interconnected by a screw 9, which can move along a detachable arc. At the upper end of the poloskoby 8 is fixed by means of a screw 10 a repairing mechanism, which consists of a threaded rod 11 with an internal threaded hole in which is located a screw 12 with a supporting platform 13. On the external thread of the threaded rod 11 there is a cone 14, on the square end of which there is a turning ring 15, moreover, its handles 16 are screwed and fixed on the cone 14. On the latter, the needle holder is installed with the possibility of tilting and turning, containing a collar 17, on which by means of screws 18 and a bracket 19 A clamping clip 20 with clamping screw M. 21. On the spider 22, which terminates the threaded rod 11, four levers 24 are fixed by means of axles 23 and pivotally connected to abutment elements 25. The latter are made in the form of bent legs with adjusting screws 26. Levers 24 have one common spring 27 fixed on the end face of the crosspiece 22 and having a similar configuration. The half box 8 is connected to the crosspiece 22. The device is used as follows.

The device is mounted on the operating table, the screw 9 is lowered and the upper half-rail of the split arc 8 is folded back together with the repositioning mechanism. The patient's bent leg is placed on the knee vice 1, the knee is fixed with branches 4 with supporting platforms 6, then the semi-rail of the split arc 8 is installed vertically and fixed at a certain height with a screw 9. Rotate the rotary ring 15 by the handles 16, spread the levers 24 by raising the cone 14, along the threaded rod 11 to the maximum angle of dilution, the stop elements 25 are mounted to the ends of the patella fragments and, rotating the rotary ring 15 in the opposite direction, begin to reduce the patella fragments, then

To increase the accuracy of reposition of the fragments, rotating the screw 12, lower the anvil 13 until it contacts the anterior surface of the patella in the fracture area, then, continuing to rotate the anvil ring 15, carry out the last reposition of the fragments. After that, with the adjusting screws 26, the manipulator holds the final longitudinal reposition of the fragments, moving the fragments together with the stop elements 25 in one direction or another to complete and exact

matching them. Further, by means of the screw 18 and the bracket 19, the smallest possible diameter of rotation of the toothed clamping needle holder around the patella is selected, which is determined by its size, the needle (not shown) is fixed in the toothed clamp 20 with the screw 21, after which a circular seam of the patella is made.

The proposed device is easy to operate and to manufacture, allows the operation to be less traumatic and more

precisely, moreover, it does not take a long time to complete the operation. The operation time compared with the prototype is reduced by 30-40 minutes.

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Claims (1)

DEVICE FOR REPRESENTATION AND COMPRESSION OF BONE CROSSBOARDS OF CRITCH, containing levers with thrust elements, articulated with a cross made with a threaded rod, as well as a rotary ring, characterized in that, in order to ensure transverse reposition of fragments and longitudinal reposition of each of them, a cone connected with a rotary ring is mounted to the rod, which contacts the levers, between which there is a bearing pad of the screw located in the threaded rod, on the cone with the possibility of tilting and turning A needle holder is installed, the thrust elements are pivotally connected to the levers, and a split arch with a knee vice is installed on the crosspiece. 124371