RU55272U1 - DEVICE FOR REPOSITION OF BONE FRAGMENTS - Google Patents

Abstract

The utility model relates to medical equipment, in particular, to instruments for performing reposition during fractures or after corrective osteotomy of abnormally fused bones. The purpose of creating a utility model is to increase the accuracy of reposition of bone fragments and improve the results of treatment of patients. The device is made in the form of a rod and elements fixed on it for holding and fixing knitting needles, one of which is made in the form of a hinge structure with the possibility of rotation in three planes, the hinge has scales of sagittal and frontal rotation. The second element for conducting the spokes is mounted on the rod with the ability to move and fix along the longitudinal guide groove. A millimeter scale is applied to the rod to control the distance when the hinge structure is displaced, to fix the position of the hinge parts relative to each other, there are fixing screws, in the central part of the hinge structure there are two through holes located in the plane of the axis of rotation of the part for holding the spokes.

Description

The utility model relates to the field of medicine, namely to traumatology and orthopedics.

A known apparatus for reposition and fixation of bone fragments, containing staples connected with each other using threaded rods and elements for fixing the spokes (1).

The disadvantage of this apparatus is the complexity of the design and the need to use radiography for accurate reposition.

A device is known for reposition and fixation of bone fragments during fractures, containing threaded rods and knitting elements (2).

The disadvantage of this device is the lack of precision reposition of fragments.

A device for reposition of bone fragments is also known, containing a rod and two elements for conducting and fixing the spokes fixed on it (3).

The disadvantage of this device is the lack of accuracy in the reposition of bone fragments, which worsens the results of treatment.

The purpose of creating a utility model is to increase the accuracy of reposition of bone fragments and improve the results of treatment of patients.

This goal is achieved by the fact that one of the elements for conducting the spokes is made in the form of a hinge structure mounted on the rod, with the possibility of rotation in three planes, the hinge has scales of sagittal and frontal rotation, the second element of the conductors is mounted on the rod with the ability to move and fix on longitudinal guide chute.

Comparison of the proposed medical device with other devices known in this field of medicine showed compliance with the criteria of the utility model.

The utility model is illustrated by graphic material. Figure 1 shows the proposed device, side view; figure 2 is the same, front view, figure 3 is the same, top view; figure 4 is a diagram of the use of the proposed device.

The device contains a support rod 1 and elements fixed thereon for holding knitting needles, one of which is made in the form of a hinge structure 2 with the possibility of rotation in three planes, the hinge has a scale of sagittal 3 and frontal 4 rotation. The second element 5 for conducting and fixing the spokes is mounted on the rod 1 with the possibility of movement and fixing along the longitudinal guide groove 6. A millimeter scale 7 is applied to the rod 1 to control the distance at offset

of the hinge structure 2, for fixing the position of the hinge parts relative to each other there are fixing screws 8 and 9, in the central part of the hinge structure 2 there are two through holes 10 and 11 located in the plane of the axis of rotation of the part for holding the spokes.

The device is used as follows.

Radiography of the damaged bone is preliminarily performed to determine the nature of the displacement of the fragments. Reposition of bone fragments 12 and 13 is as follows. The place of a bone fracture of a limb, for example, radiation, is exposed. The hinge element 2 is rotated at a given angle, for example 25 ° to the axis of the radius. Through the holes 10 and 11 in the Central part of the hinge structure into the distal metaepiphysis of the radius, two spokes 14 are drawn at a given angle and fix them. At the border of the middle and lower third, through the holes 15 and 16 in the proximal clamp 5, two spokes 17 and 18 are carried into the radius, and they are fixed. Using a millimeter scale 7 measure the distance between two pairs of spokes. In the case of an abnormally fractured fracture, the radius bone osteotomy is performed; in case of a fresh fracture, the fragments are repositioned by turning the hinge structure 2 to the necessary angles in the sagittal and frontal planes and moving it along the bar in the distal direction from the retainer 5, eliminating the displacement of the fragments along the length. Rotational displacements are eliminated by loosening the lock nut 19, in accordance with preliminary calculations. Temporarily fix the fragments in the correct position with knitting needles and remove the device. Produce bone osteosynthesis of the radius in the correct position. Remove the knitting needles.

Clinical example. Patient B., born in 1968, and. No. 26937041, was admitted to the Department of Orthopedics-2 of the Kalinin Special Clinical Hospital on 12.11.2004 with a diagnosis of Closed extensor unstable fracture of the distal metaepiphysis of the left radius with displacement of fragments. Trauma - November 5, 2004. Operation was performed on November 15, 2004 (No. 601): open reposition and osteosynthesis of the left radial bone with the back T-shaped LCP plate (AO-titanium). The postoperative period was uneventful. On the 12th day, the seams were removed. The wound healed by primary intention. From the 3rd postoperative day, the patient began therapeutic exercises for the hand and fingers, was discharged on the 14th day in a satisfactory condition, without complications. He started to work 3 weeks after the operation. At the follow-up examination after 6 weeks: the total range of movements in the wrist joint was 85% of the healthy hand, the force of rough grip - 53%. On radiographs of the wrist joint - complete consolidation of fragments of the radius, without loss of reposition. According to the results of objective and subjective assessment criteria, the treatment result was found to be excellent.

Using the proposed device allows with minimal labor and with high accuracy to reposition the distal radius, reduce the duration of surgery and radiation intraoperative load on the patient and surgeons.

Simplicity of design and high accuracy of measurement allow us to recommend the proposed device for use in medical institutions.

INFORMATION SOURCES.

1. Auth. Testimonial. USSR No. 876123, M. Cl. A 61 B 17/18, 1981

2. Auth. Testimonial. USSR No. 1591969, M. Cl. A 61 B 17/58, 1990

3. Femandez D., Jupiter J. Fractures of the Distal Radius. 1996 .-- P.285-288.

Claims (1)

A device for reposition of bone fragments during fractures, consisting of a rod and two elements fixed to it for holding and fixing knitting needles, characterized in that one of the elements for holding knitting needles is made in the form of a hinge structure mounted on the bar, with the possibility of rotation in three planes, the hinge has scales of sagittal and frontal rotation, the second element for conducting the spokes is mounted on the rod with the ability to move and fix along the longitudinal guide groove.