Biomedical subjects
Publications and source records attributed to J W Barros.
Twenty-three patients with chronic or acute to chronic slip of the capital femoral epiphysis were treated using a modified trapezoid osteotomy of the femoral neck. All slips were greater than 60 degrees. After a follow-up period of 70 (54-93) months, the results were excellent or good in 18 hips, fair in 1, and poor in 4 hips. Avascular necrosis developed in 3 hips, and chondrolysis in 2.
A scintigraphic study of the healing process of type A and B closed tibial shaft fractures was carried out in 40 cases treated non-operatively, comprising 32 men and eight women aged 30.6 yr on average. Scintigraphic scans were obtained with technetium methylenediphosphonate (MDP-Tc99m, 25 mCi) at 6, 12 and 24 weeks after the fracture and an activity index was calculated taking the mean of three consecutive uptake counts for both fractured and normal opposite leg, used for comparison. The results showed that the activity index in general decreased progressively from the first to the third evaluation, with little difference in behaviour between the two types of fractures. However, for B type fractures the activity index remained stable from the first to the second evaluation, followed by a marked decrease at the third evaluation, with a comparable end result for both fracture types. It was concluded that a decrease of the activity index occurs in both types of closed fractures undergoing uneventful healing and that such a decrease can be taken as a parameter for further studies which include delayed union and non-union.
Bilateral transscapholunate dislocations were treated with immediate open reduction and internal fixation. Eighteen months after injury the patient was asymptomatic.
Forty patients with intertrochanteric fractures of the femur were treated by external fixation between July 1992 and April 1994. They were selected because of their high surgical risk, and evaluated by radiographs immediately after operation, and at 30 and 90 days. The results indicate that external fixation is a useful method of treatment for this type of patient.