RU2159091C2 - Device for reposition and fixation of fractures of hipbones - Google Patents

Abstract

FIELD: medical equipment, applicable for treatment of fractures of human-being pelvis ring. SUBSTANCE: the device has two semi-archs with two or more pairs of stop threaded rods fastened in them by means of fixing assemblies, reposition assembly and an assembly for skeletal extension. Threaded stop rods introduced in the pelvis are rigidly fastened in the semi-archs by means of fixing assemblies. The semi-archs are interconnected by means of the reposition assembly that can be moved apart dur to the increase of the clearance in the rods, movement of the rods in the horizontal plane, it has also an opportunity of damper fixation. Attached to the semi-archs is the assembly for skeletal extension, in which the threaded rod introduced in the femur is damper-fastened. EFFECT: uniform distribution of load on the bone due to the damper and skeletal extension by the femur. 5 dwg

Description

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

 There are several devices for a similar purpose.

 The device [1], containing a trapezoidal hinge frame, including threaded hinged bases and two rods, pivotally interconnected with the possibility of adjusting the length, two traverses and rods are fixed at the free ends of the rods in order to expand the reposition volume and eliminate weakening of the fixation of fragments during multiple fractures on the traverses with the help of clamps secured half rings interconnected by a threaded beam parallel to the threaded bases Niyama, and the rods are placed on semirings.

 The disadvantages of this device are the complexity of manufacturing, the absence of a damper that evenly distributes the load on the bone, the lack of skeletal traction over the femur. The device [1] can be considered a prototype.

 To eliminate the above disadvantages directed this invention.

 A device for reposition and fixation of fractures of the pelvic bones allows you to rigidly fix two or more pairs of threaded threaded rods inserted into the pelvis using half-arches, to connect the half-arcs with the help of the reposition unit, which can be moved apart by increasing the clearance in the telescopic rods, moving the rods in the horizontal plane, as well as damper fixation, while a skeletal traction assembly can be attached to the semi-arches, in which a threaded rod is fixed damper enny into the femoral bone.

 In FIG. 1 shows a general view of a device for reposition and fixation of pelvic bones; FIG. 2 is a view A in FIG. 1 - presents a threaded thrust rod, in FIG. 3 is a view B in FIG. 1 - a reposition unit is presented; FIG. 4 is a view B in FIG. 1 - a fixing unit is shown, in FIG. 5 is a view D in FIG. 1 - shows a site for skeletal traction.

 The device contains: 1 - two half-arches, 2 - the cut-in end of the threaded stop rod, 3 - the tension end of the threaded stop rod, 4 - the thrust pad of the threaded stop rod, 5 - the extension bar, 6 - the telescopic rod, 7 - the adjusting screw of the telescopic rod, 8 - an adjusting nut, 9 - a spring, 10 - a washer, 11 - a remote pad, 12 - a threaded stopper, 13 - a fixing nut, 14 - an external bar, 15 - an adjusting nut, 16 - a washer, 17 - a spring.

 The device operates as follows.

 The cut-in end 2 of the threaded thrust rod 12 is inserted into the supraclavicular regions of the pelvis, 1 rod on each side, the wings of the ilium 1-2 rods on each side until the thrust sites 4 contact the bone. The number of inserted threaded thrust rods is determined by the nature of the damage to the pelvis.

 Then, the tension end 3 of the threaded thrust rod is rigidly fixed using remote sites 11 and fixing nuts 13 to the half arcs 1.

 The next step is the installation of the reposition unit.

 Remote bars 5 are rigidly attached to the semi-arches 1, connected to each other by telescopic rods 6 with the help of adjusting nuts 8, and between the extension bar 5 and the adjusting nut 8 there is a spring 9, fixed with washers 10.

 After that, the final reposition of fragments is achieved by moving the telescopic rods 6 in the holes of the extension bars 5 in the frontal plane, as well as by increasing the clearance of the telescopic rods with fixation by means of the adjusting screw 7. Then, by moving the adjusting nut 8, they completely compress the spring 9 with the purpose of damper fixing the fragments of the pelvis.

 A node for skeletal traction is mounted in case of fracture of the bottom of the acetabulum. A threaded thrust rod 12 is inserted into the neck of the femur, which is fastened with the help of the adjusting nut 15, the washer 16 and the spring 17 to the extension bar, which in turn is rigidly attached to the half-arc 1. At the same time, by moving the adjusting nut 15 along the tension end 3 of the threaded thrust rod 12 the required amount of hip extension is achieved.

 The design of the device for reposition and fixation of fractures of the pelvic bones allows to improve the quality of treatment and reduce the rehabilitation of the patient.

 A device for reposition and fixation of pelvic fractures contains for the most part standard parts included in the Ilizarov apparatus.

INFORMATION SOURCES
1. A.S. N 1149960 USSR, MKI 4 A 61 B 17/60 Compression-distraction apparatus for osteosynthesis of pelvic fractures.

Claims (1)

 A device for reposition and fixation of fractures of the pelvic bones, containing two half-arcs, with two or more pairs of threaded threaded rods fixed in them using fixing nodes, a reposition unit, characterized in that threaded thrust rods inserted into the half-arches with the help of fixing nodes are rigidly fixed the pelvis, half-arches are interconnected by means of a reposition unit, which can be moved apart by increasing the clearance in the telescopic rods, moving the rods in the horizontal plane, as well as the possibility of fixing the damper, wherein the assembly is attached to the half-arches for skeletal traction, in which the damper is mounted a threaded rod, inserted into the femoral bone.

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