RU195578U1 - Intramedullary telescopic device for fixing fragments of long tubular bones of the lower extremities in children with imperfect osteogenesis - Google Patents

Abstract

An intramedullary telescopic device for fixing fragments of long tubular bones of the lower extremities in children with imperfect osteogenesis, consisting of tubular and rod parts that interact with each other. The objective of the utility model is to increase reliability to prevent the development of deformations and pathological fractures in children with imperfect osteogenesis. The problem is achieved in that its tubular part (1) is placed in the distal part of the long tubular bone (7), the core part (4) is placed in its tubular part (1) and in the proximal part of the long tubular bone (10), while the lower the end of the tubular part is “blindly terminating” and is provided with a thread (3) for fixation in the distal pineal gland and the distal germinal zone (8), and the upper end of the rod part is equipped with a thread (5) for fixation in the proximal epiphysis and germinal zone (10).

Description

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

Known intramedullary telescopic rod system Fassier-Duval (Fassier F, Duval P, Dujovne A; Pega Medical. Intamedullary nail system. Patent US 06524313 B1, A61B 17/72. No. US 09 / 671,164; 09/28/2000; 25.02.2003) from the through tubular (hollow) part and the rod (inner) part) interacting with each other.

The disadvantage of this system installed in the bones is that upon injury (fracture) in the distal shin or thigh, as well as in patients with overweight, the core of the telescopic system is deformed, which is the least durable in view of the smaller diameter, which does not allows you to perform the main function of the system - fracture prevention.

The objective of the utility model is to increase reliability to prevent the development of deformations and pathological fractures in children with imperfect osteogenesis.

The technical result of the task is achieved by the fact that in the intramedullary telescopic device for fixing fragments of long tubular bones of the lower extremities in children with imperfect osteogenesis, consisting of tubular and rod parts interacting with each other, it is proposed to place the tubular part in the distal section of the long tubular bone, the rod part place in its tubular part and in the proximal part of the long tubular bone, while the lower end of the tubular part is “blindly end ayuschimsya "and provided with a thread for fixing in the distal epiphysis and the distal growth plate, and the upper end of the stem portion is threaded for fixing to the proximal epiphysis and growth plate.

Figure 1 shows the tubular part, position 1 of the intramedullary telescopic device, position 2 - the groove for a slotted screwdriver, position 3 - the threaded end of the tubular part, position 1.

Figure 2 shows the rod part 4 of the intramedullary telescopic device, position 5 is the threaded end of the rod part of the rod part 4 of the intramedullary telescopic device, position 6 is the hexagonal recess for the hexagonal screwdriver

Figure 3 shows the tubular part 1, located in the distal section of the long tubular bone 7 with fixation by the threaded part 3 in the distal growth zone and pineal gland 8, the rod part 4, located in the proximal part of the bone 9 and in the tubular part 1 of the intramedullary telescopic device. The stem 4 is fixed by a threaded end 5 in the proximal pineal gland and the germ zone 10.

An intramedullary telescopic device for fixing fragments of long tubular bones of the lower extremities in children with imperfect osteogenesis is used as follows.

The device was installed to a patient K., aged 5, with a diagnosis of imperfect osteogenesis due to frequent fractures and severe deformation of the femur. Corrective osteotomy of the femur was performed from lateral access. From a section in the trochanteric region, access was made in a pear-shaped fossa. The femur was recanalized by a cannulated drill through a spoke. In the distal direction, the tubular part 1 is inserted into the medullary canal of the femur. Under radiological control, a tubular part 1 with thread 3 is screwed into a distal sprout zone and distal pineal gland using a slotted screwdriver installed in groove 2, and then the rod part 4 is inserted into the canal and into the tubular part 1. Again, x-ray control is performed to determine the position of the shaft with respect to the femur. The threaded end 5 is screwed into the proximal pineal gland and sprout zone 10 with a hexagonal screwdriver installed in the hexagonal recess 6. The wounds are sutured in layers. In the process of bone growth, the tubular 1 and the rod parts 4 interact - their mutual displacement (the rod part leaves the tubular part), leading to the lengthening of the intramedullary telescopic device, which will prevent the development of repeated deformations and pathological fractures.

The positive effect of the intramedullary telescopic device for fixing fragments of long tubular bones in children with imperfect osteogenesis is to increase the mechanical strength of long tubular bones and prevent deformations and pathological fractures.

Claims (1)

An intramedullary telescopic device for fixing fragments of long tubular bones of the lower extremities in children with imperfect osteogenesis, consisting of a tubular and rod parts interacting with each other, characterized in that its tubular part is designed to be placed in the distal section of a long tubular bone, the rod part is designed to accommodate in the tubular part and in the proximal part of the long tubular bone, while the lower end of the tubular part is “blindly terminated” and provided Threaded connection for fixing in the distal epiphysis and the distal growth plate, and the upper end of the stem portion is threaded for fixing to the proximal epiphysis and growth plate.

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