Biomedical subjects

R S Davidson

Publications and source records attributed to R S Davidson.

76 records · Page 5Linked to original sources

PubMedDate not supplied

Proximal fibular osteochondroma with associated peroneal nerve palsy: a review of six cases.

Osteochondroma of the proximal fibula is relatively common, but reports of this lesion in conjunction with peroneal nerve palsy have been scarce. Six patients with peroneal nerve palsy and fibular exostosis are presented with the results of electrical studies, radiographic evaluation, physical examination, and operative treatment. A wide variation in presentation and outcome was observed. Preoperative and postoperative electromyography and nerve-conduction studies are useful in evaluation. A heightened awareness of this entity is required to avoid permanent damage in an otherwise treatable condition.

Adolescent↗

PubMedDate not supplied

Early radiographic differentiation of infantile tibia vara from physiologic bowing using the femoral-tibial ratio.

SUMMARY: The authors hypothesized that the ratio of the femoral to tibial metaphyseal-diaphyseal angles (femoral-tibial ratio [FTR]) more accurately differentiates physiologic bowing from infantile tibial vara than the tibial metaphyseal-diaphyseal angle (TMDA). The purpose of this study was threefold: to determine the false-negative and false-positive error rate of the FTR and TMDA; to determine to the effect of rotation on the FTR and TMDA; and to determine the reliability of the FTR and TMDA measurements. An FTR < 1 resulted in a false-negative error rate of 10% and a false-positive error rate of 7%, whereas a TMDA > 13 degrees resulted in a false-negative error rate of 23% and a false-positive error rate of 10%. The difference between internal and external rotation was not significant for the FTR, whereas it was for the TMDA. The FTR was found to have good interobserver and intraobserver reliability (0.78 and 0.98, respectively).

Age Factors↗

PubMedDate not supplied

Growth disturbances of the proximal femur after pinning of juvenile slipped capital femoral epiphysis.

Premature closure of the capital femoral physis after pin fixation of slipped capital femoral epiphysis (SCFE) in the juvenile population (at least 1 year less than the established mean) can lead to growth disturbances of the proximal femur. A retrospective review of 21 patients (33 hips) who had a pinning of a juvenile SCFE was performed. Growth disturbances including greater trochanteric overgrowth, coxa vara, and coxa breva were noted in 64% of the hips. An 80% incidence of bilateral involvement was noted in the juvenile group. Consideration should be given to prophylactic pinning of the contralateral hip and use of a smooth pin construct to prevent premature closure of the growth plate in children with significant growth remaining.

Black People↗

PubMedDate not supplied

Scoliosis in patients treated with growth hormone.

Two hundred fifty children being treated with growth hormone were screened for scoliosis by using the Adams and Bunnell techniques. If indicated, an anteroposterior radiograph was done and measured by the Cobb and Risser methods. Scoliosis was defined as a frontal curve of > or = 10 degrees; progression, as a sustained increase of > or = 5 degrees, and a progressive curve as one > or = 25 degrees and meeting our criteria for orthotic management. In 10 of the 250 patients, scoliosis developed. Six curves were double major thoracic and lumbar; three thoraco-lumbar; and one single thoracic. Six of the 10 patients had progressive curves and required an orthosis. Their average annualized rate of progression was 26 degrees. Progression was associated with double major curves and an earlier Risser stage. Despite bracing, progression continued to fusion in three patients. We conclude that growth hormone may increase the risk of progression of scoliosis. Furthermore, the progression is frequently rapid and requires special vigilance by the treating physician.

Adolescent↗