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Biomedical subjects

R B Stonehill

Publications and source records attributed to R B Stonehill.

At least 19 recordsLinked to original sources
PubMed1982

The accuracy of venturi masks at altitude.

The concentration of oxygen provided in the inspired gas by five samples of a venturi mask were measured at ground level and at altitudes up to 10,000 ft for each of the oxygen port settings from 24-50% oxygen. The concentration of oxygen provided at a given setting was virtually identical for each of the five masks and was unaffected by ascent to 10,000 ft. Thus, patients with chronic hypercarbia could receive "low flow oxygen therapy" while traveling on commercial airlines without danger of acute hypo-ventilation by utilizing a venturi mask.

Aerospace Medicine↗
PubMed1981

Fever response of patients on therapy for pulmonary tuberculosis.

The course of fever was examined in 75 patients with pulmonary tuberculosis treated with modern chemotherapy. Sixteen patients (21%) were afebrile and differed from 59 febrile patients (79%) by having lower incidences of the following: symptoms (p < 0.02), alcoholism (p < 0.01), lung cavitation (p < 0.01), "far advanced disease" (p < 0.05), and sputum smears containing "numerous" acid-fast bacilli (p < 0.01). Resolution of fever was variable (mean, 16 days; median, 10 days; range, 1 to 109 days). Thirty-eight patients (64%) became afebrile within 2 wk (group 1); 21 (36%) had fever for longer than 2 wk (group 2). Far advanced disease and high temperature (> 38.8 degrees C) on admission were more frequent in group 2 (p < 0.05 and p < 0.01, respectively). However, the groups did not differ in demographic features or in the frequency of symptoms on admission, alcoholism, lung cavitation, numerous acid-fast bacilli on sputum smears, or coexisting bacterial respiratory infection. Antimicrobial drug treatment of presumed coexistent bacterial infection in 19 febrile patients did not influence the course of fever. Analysis of variance and covariance were used to compare the independent effects of various antituberculosis drug regimens on the course of fever; no significant differences were observed.

Alcoholism↗
PubMed1980

Variability of the lateral position test in normal subjects.

An evaluation of the variability of the lateral position test (LPT) in normal subjects was undertaken. In 10 healthy, nonsmoking young adults, tests were performed in triplicate for 5 consecutive days. The results indicate that sizable differences in determinations of unilateral pulmonary function by the LPT can exist from day to day and from test to test on any given day in any given person. Variability of repeated measurements by the same observer and of measurements by different observers was minimal. In view of the great variability in repeated LPT results on the same subject, it is necessary to perform several tests in each subject before meaningful interpretation of the data can be made. This limits the usefulness of the LPT in the clinical assessment of unilateral pulmonary function.

Adult↗
PubMed1973

Heat stroke.

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Acclimatization↗