Biomedical subjects
P S Mann
Publications and source records attributed to P S Mann.
Fiberbronchoscopy in smear-negative miliary tuberculosis.
Twenty-two patients with smear-negative miliary tuberculosis underwent fiberbronchoscopy and brush smears; bronchial aspirates and transbronchial lung biopsy specimens were obtained. A definite diagnosis of tuberculosis was made in 16 (73 percent) patients. A rapid diagnosis was established in 14 of these 16 patients either from brush smears alone (three) or bronchial aspirate smear alone (one) or exclusively by histopathologic study of biopsy specimens (seven). Both brush smears and biopsy histopathology results provided the diagnosis in three patients. Bronchial aspirate culture was the only positive specimen in two patients. No serious complication resulted from the procedure. Our experience substantiates previous reports of the value and safety of fiberbronchoscopy in the rapid diagnosis of smear-negative miliary tuberculosis.
Decisional difficulty in pattern discrimination.
To assess the relative influence of decisional ambiguity and response uncertainty on task difficulty, a pattern discrimination task was presented to 60 college undergraduates. The comparison stimuli were nine 20 X 20 matrices of randomly assigned black and white squares, with percent of black squares varying evenly from 10% to 90%. The standard contained 50% black squares. In a low-response uncertainty condition there were two response categories, and five in a high uncertainty condition. It was hypothesized that decisional ambiguity should be greatest at the boundaries between categories. The results suggested that decisional ambiguity was the critical factor determining judgment difficulty.
Pulmonary functions in tropical pulmonary eosinophilia.
Abnormalities in pulmonary functions in a group of ten patients with tropical pulmonary eosinophilia were analysed. Mild obstruction was observed in four, restrictive pattern in three, combined defect in one and two had normal study. Except in one patient in whom mild obstructive defect persisted, functions in all others reverted to normal on treatment with diethylcarbamazine.
Segmental consolidation and a pulmonary nodule in a young patient.
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Right paracardiac mass in association with left fibrocavitary disease.
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