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Biomedical subjects

A Trias

Publications and source records attributed to A Trias.

31 records · Page 2Linked to original sources
PubMed1976

Pulmonary function studies in Friedreich's ataxia.

Pulmonary function tests were carried out on 20 patients with Friedreich's ataxia. The lung volume, diffusing capacity, flow rate, flow-volume curve, and blood gases were measured. In each patient the degree of scoliosis was measured and the pulmonary function tests were analyzed in relation to the scoliosis. A control group of 13 subjects with idiopathic scoliosis was used for comparison. In both groups, the degree of scoliosis was similar.

Adolescent↗
PubMed1976

Synovial chondrometaplasia: review of world literature and a study of 18 Canadian cases.

A retrospective study of synovial chondro-metaplasia in Canada revealed 18 well-documented cases of this condition. Review of these cases together with 137 cases obtained from the literature permitted clarification of the clinical, radiologic and histologic features of the clinical, radiologic and histologic features of the disease. Positive histologic proof of synovial chondrometaplasia is necessary for a true diagnosis. Synovectomy with excision of loose bodies is the treatment of choice in symptomatic cases.

Canada↗
PubMedDate not supplied

Dynamic loads experienced in correction of idiopathic scoliosis using two types of Harrington rods.

This paper reports the results of a series of tests conducted to evaluate the dynamic loads exerted by the Harrington rod on the vertebral bones during the correction of idiopathic scoliosis. Two types of Harrington rods were tested: the standard stepped rod and a modified threaded rod. The latter had a threaded end replacing the standard stepped end. The tests were conducted on linear and nonlinear springs, the mechanical characteristics of which are similar to those previously obtained from measurements performed on human spines. The results of the tests are reported and the two rod designs are evaluated accordingly. The modified threaded rod shows definite mechanical advantages over the stepped rod; however, the design is still open for modifications to overcome certain functional difficulties. (The Custom Product Services of Zimmer Co. offers a child spinal threaded rod designed by Dr. Kenton Leatherman.)

Biomechanical Phenomena↗
PubMedDate not supplied

Chondrosarcoma of the hand.

A case of chondrosarcoma of the hand recurred 4 times over a period of 32 years. Forty-seven cases of hand chondrosarcomas have been found in the literature. Histological diagnosis is difficult in differentiating chondrosarcomas from benign chondromas. Pain and swelling are the main symptoms of recurrence. The diagnosis is established by arteriography and excisional biopsy. Extraskeletal hand chondrosarcomas do not metastasize and other hand chondrosarcomas do so only rarely. Block excision of localized amputation is the treatment of choice.

Aged↗
PubMedDate not supplied

Femoral osteotomy in Perthes disease.

A subtrochanteric osteotomy was performed on 25 hips of 24 patients affected with Perthes disease. Twelve of these patients have been followed 4 or more years postoperatively. Coxa plana, or "mushroom" deformity, never occurred. Roundness of the head was always achieved. Internal fixation was first secured with a 4 screw plate and later advantageously substituted by Hoffmann external fixation. Post-operative shortening was always present but gradually resolved to less than 1 cm in most cases. A Trendelenburg positive sign was always present postoperatively and usually disappeared within 2 years. Internal rotation of 40-60 degrees was obtained at surgery. The resulting external rotation deformity of the leg corrected spontaneously. Varus deformity, on the other hand, changed little within this follow-up. Varisation of the hip is nevertheless an essential part of the osteotomy. The overall results were directly related to the amount of epiphysis involved. The fate of the epiphyseal plate seems to play a major role in the neck deformities and the resulting coxa vara. The absence of metaphyseal changes in the face of significant epiphyseal involvement is an ominous sign.

Child↗