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Biomedical subjects

A Sahar

Publications and source records attributed to A Sahar.

At least 73 records · Page 4Linked to original sources
PubMed1975

Chronic subdural hematoma simulating transient cerebral ischemic attacks. Case report.

A patient is presented in whom chronic subdural hematoma simulated transient ischemic attacks. The neurological manifestations were those of recurrent, transient episodes of expressive dysphasia preceded by focal sensory deficit. Various pathophysiological mechanisms which could have caused the unusual clinical picture are briefly considered.

Aphasia↗
PubMed1973

Brain abscess. Review of 89 cases over a period of 30 years.

Eighty-nine cases of brain abscess, diagnosed over a period of 30 years, are reviewed. The incidence of this disease did not decline throughout the period. Abscesses of ear and nose origin constituted the largest group (38%). Postoperative abscesses seem to have increased in incidence, presumably due to routine postoperative antibiotic treatment. Antibiotics were possibly responsible for the suppression of signs of infection in 45% of the patients, who presented as suffering from a space-occupying lesion. The most accurate diagnostic tool was angiography, which localized the lesion in 90% and suggested its nature in 61%. Brain scan may prove as satisfactory. Staphylococcus was cultured in about two-thirds of the cases. Mortality seemed to decrease concomitantly with the advent of more potent antibiotics. The treatment of choice in terms of both mortality and morbidity seemed to be enucleation after previous sterilization. The hazards of radical surgery should be taken into consideration.

Adolescent↗
PubMed1971

Spontaneous canine hydrocephalus: cerebrospinal fluid dynamics.

Cerebrospinal fluid dynamics were studied in 14 dogs with spontaneous hydrocephalus. In nine of the dogs aqueductal obstruction was observed and the remainder had a `communicating type' hydrocephalus. The major histological findings consisted of severe ependymal destruction, spongy changes in the periventricular white matter, increased density of capillaries in this area, and varying degrees of thickening, fibrosis, and fusion of the choroid villi. The formation and absorption of CSF were studied by perfusion of the cerebral ventricles. The rate of formation of CSF was found to decrease with perfusion pressure by V(f) = 0·02595-0·00022 P ml./min (P = pressure in cm H(2)O). The absorption of spinal fluid was found to increase linearly with pressure by V(a) = 0·0165 + 0·00050 P. The various factors influencing the formation and absorption of the spinal fluid are discussed. The meaning and attainment of `arrest' of the hydrocephalic process in terms of the measured rates of CSF formation and absorption in these animals are considered.

Animals↗