Search PubMed⌕ Search

Biomedical subjects

D Hall

Publications and source records attributed to D Hall.

At least 253 records · Page 14Linked to original sources
PubMed1976

Treatment of severe hypertension with minoxidil and its effects on systemic and pulmonary haemodynamics.

1. The chronic administration of minoxidil, 0-024-0-212 mmol (5-40 mg) daily, to fifty-two severely hypertensive patients resulted in an average reduction of mean arterial pressure from 170 to 111 mmHg. 2. Haemodynamic studies in twelve of these patients indicated that the rise in pulmonary arterial pressure in patients without heart failure appears to be a direct result of a disproportionately large increase in cardiac output with respect to a relatively small decrease in pulmonary vascular resistance. Anti-hypertensive treatment of patients with congestive heart failure resulted in a decrease in mean pulmonary arterial pressure.

Adult↗
PubMed1976

Fluorimetric assay of tetracycline mixtures.

A simple and precise fluorimetric method is described for the simultaneous assay in plasma of a mixture containing chlortetracycline, demethylchlortetracycline and tetracycline. Assay within the therapeutic ranges of 0-5 mg litre(-1) is achieved by formation of strongly fluorescent aluminum/tetracycline complexes, without prior extraction or separation of the individual antibiotics. This is performed by determinations at the peak excitation and fluorescence emission wavelengths of each tetracycline chelate. The method can be similarly applied to the assay of oxytetracycline, rolitetracycline and minocycline.

Aluminum↗
PubMed1976

Hyperbaric system for oxygen toxicity studies in the toad urinary bladder.

A hyperbaric research system to study the effects on membrane function of oxygen at pressures as high as 20 ATA has been designed. The system includes a pressure chamber capable of holding eight isolated toad bladder short-circuit current apparatuses and unique experimental gassing, diluent addition, and sampling systems which are monitored by a control panel mounted on the side of the pressure chamber. These externally controlled gassing, diluent, and sampling systems permit experimental manipulations at any ambient pressure and are a significant addition to the methodology of hyperbaric research.

Animals↗