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Biomedical subjects

P K Sethi

Publications and source records attributed to P K Sethi.

At least 19 recordsLinked to original sources
PubMed1992

Mathematical modelling and field trials of an inexpensive endoskeletal above-knee prosthesis.

The swing-phase motion of the shank of an above-knee prosthesis has been modelled mathematically. An inexpensive endoskeletal prosthesis was designed using the Jaipur foot and conduit pipes with a hinge joint for the knee. Results of field trials and the modelling indicate that a very simple above-knee prosthesis can give near normal gait at "normal" walking speeds on flat surfaces. The swing of the shank is most sensitive to the timing of toe-off.

Acceleration↗
PubMed1991

Lymphocytic hypophysitis: can open exploration of the sella be avoided?

A case of lymphocytic hypophysitis (LYHY) in a menopausal woman is presented. A review of the literature suggests that conservative treatment may be tried in suspected cases of LYHY, if the vision of the patient is not threatened. A transphenoidal stereotactic biopsy of the mass may be performed if the patient fails to improve or deteriorates, thus avoiding open exploration of the sella in selected cases.

Adult↗
PubMed1991

Non-operative treatment of fractures of the humeral shaft: a comparative study.

Forty cases of diaphyseal fracture of humerus were treated by functional cast bracing (FCB). Results were compared with a series of 25 patients treated by U cast method. Average time taken for union was 7.5 weeks with a range of 5-14 weeks by FCB method. Fractures treated by U cast method took on an average 10 weeks to unite. Stiffness at shoulder and elbow was uniformly found in patients treated by U cast. More than 50% patients had varus angulation less than 5 degrees after treatment by FCB. Only 16% had varus angulation less than 5 degrees by U cast method while 32% had varus angulation more than 15 degrees. FCB is distinctly superior method of treatment for diaphyseal fracture of humerus.

Adolescent↗
PubMed1976

A new familial syndrome characterized by pigmentary retinopathy, hypogonadism, mental retardation, nerve deafness and glucose intolerance.

Three siblings with retinitis pigmentosa, deafness and mental retardation were studied. Physical abnormalities included nystagmus, acanthosis nigricans and multiple keloids. The two male siblings had gynecomastia, small testes and mild subvirilization whereas the only indication of hypogonadism in the female sibling was oligomenorrhea. Testosterone levels in the males, which were in the low to low normal range, were increased by the administration of large doses of chorionic gonadotropin. The two affected males had elevated plasma luteinizing hormone (LH) and follicle-stimulating hormone (FSH) levels which were decreased by the administration of testosterone and increased by the administration of clomiphene. One sibling had mild obesity and diabetes mellitus, one had moderate obesity, normal glucose tolerance and hyperinsulinism and the third had abnormal glucose tolerance and hyperinsulinism. This familial syndrome is distinct from either the Laurence-Moon, Bardet-Biedl or Alström disorders and provides further evidence of genetic heterogeneity in this group of autosomal recessive traits.

Adolescent↗
PubMed1975

Persistent proatlantal artery with carotid-vertebral anastomosis. Case report.

The authors describe the occurrence of proatlantal artery as an incidental angiographic observation in a young Indian soldier. This primitive anastomotic channel is seen extending from near the origin of the external carotid artery to the suboccipital region, traversing the foramen magnum and coursing beyond like a vertebral artery. The developmental and roentgenological aspects of carotid-basilar and carotid-vertebral anastomosis are discussed, along with a review of four similar cases reported previously.

Adult↗