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[Areas of safe use of bone nails on the forearm].

On the basis of the data of topography-anatomical study, carried out at 30 upper extremities, are proposed zones and directions of safe application of wires of the compression-distraction apparatus at 4 forearm levels, developed with allowance made for individual differences in structure and topography of vessels and nerves as well as functional position of the segment. An experimental examination (30 extremities) and clinical approval (30 patients) of the proposed zones and directions have confirmed the practical use of the obtained data that allows to recommend them to be widely introduced into the clinical practice.

Bone Nails

[Congenital pseudarthrosis of the tibia and fibula in children. Results of the treatment of 18 cases with nails and bone grafts].

Eighteen cases of congenital pseudarthrosis of the leg in 17 children were treated by nailing and tibio-fibular graft with a mean follow-up of six years (from one to twelve years). Six patients had reached the end of growth. Primary union was obtained in 17 cases in a mean time of 6.5 months (from 3.5 to 18 months), but one case developed a new pseudarthrosis at the level of an associated upper tibial osteotomy. Only one case required a supplementary graft. Walking was usually achieved without any apparatus after five-and-a-half months, the tibia being protected by a nail which was left in place until the end of growth. In two cases, a fracture produced by trauma occurred in the limb long after consolidation. These two fractures healed in the normal time. Inequality of limb length was present in all the cases, but its progress varied. On three occasions it was treated by femoral lengthening. Stiffness of the ankle and subtaloid joints resulted from nailing of the hindfoot in nine cases and improved very little after freeing of the joints. The use of telescopic rods avoids the need for further operations to change the rod during growth. We consider that this is a reliable method but that, in certain cases, the effects on growth and on the foot can be diminished by appropriate modifications of technique.

Bone Transplantation

[Palliative surgical therapy of pathologic fractures].

From 1971 through 1985, 97 patients with pathological fractures were operated at the Giessen University Hospital for Accident Surgery. The palliative operations were intended to relief pain, to prevent long periods of bed rest for the patients, to restore the loading capacity of the lower extremity as well as the mobility of the upper extremity. The preservation or restoration of the patients general mobility in everyday life and the psychological aid for the patients had to be considered as well. In case of primary tumors, pathological fractures as a result of formation of metastases are most frequently induced by mammary carcinomas, followed by bronchial carcinomas, hypernephromas, colon carcinomas, and plasmocytomas. The preferential sites of metastases are the proximal femur area, the femur shaft, the humerus, and the pelvis. In our palliative operations, we applied 43 compound osteosyntheses, 23 endoprostheses, 17 resections, 10 marrow nailings, 4 Ender nailings or multiple bone nailings, respectively. One patient underwent a stabilization of the femur neck by means of a strap nail and another patient a stabilization of the spine by spondylodesis. Excisions were performed in 7 cases. The average survival was between 24 and 52 weeks.

Adult

Heterotopic ossification about the hip after intramedullary nailing for fractures of the femur.

A prospective study of 100 consecutive unilateral fractures of the shaft of the femur was performed to delineate the incidence of, and the factors predisposing to, heterotopic ossification about the hip after intramedullary nailing. Bone debris from reaming of the endosteal canal is deposited in the soft tissues surrounding the site of insertion of the nail, and we postulated that this debris may stimulate the formation of heterotopic bone and that decreasing the amount of debris left in the tissues after nailing may decrease the amount of heterotopic ossification. To test this theory, the patients were treated with routine intramedullary nailing and were randomly divided into two groups. In Group I, the operative incision was irrigated with 250 milliliters of normal saline solution with use of a bulb syringe before the wound was closed, and in Group II, the incision was irrigated with 3000 milliliters of normal saline solution with use of pulsatile lavage. The two groups were similar in all other respects. Eighty patients (eighty fractures; forty in Group I and forty in Group II) were available for follow-up and were evaluated in a blind fashion after the fracture had united. A grading system that was based on the length of the heterotopic ossification, as measured on antero-posterior radiographs of the hip, was used. In thirty-two of the patients (40 per cent), no heterotopic ossification developed, whereas minimum or mild ossification developed in twenty-seven patients (34 per cent). Moderate ossification developed in twelve patients (15 per cent) and severe ossification, in nine patients (11 per cent).(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent