[Light and darkness in the history of drugs; 1945-1965].
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Nursing↗
Biomedical subjects
C Jansson
Publications and source records attributed to C Jansson.
The effect of ipratropium bromide on nasal hypersecretion induced by methacholine in patients with vasomotor rhinitis. A double-blind, cross-over, placebo-controlled and randomized dose-response study.
The effect of various doses of ipratropium bromide aerosol on nasal hypersecretion induced by five concentrations methacholine was studied in 24 patients with vasomotor rhinitis and excessive watery nasal secretion. The volume of nasal secretion was greater with each of the five increasing doses of methacholine from 7.5 to 120 mg/ml. The median volume of nasal secretion was alike in all patients after administration of methacholine only and after treatment by placebo followed by methacholine. When the patients were treated with ipratropium bromide prior to administering methacholine the volume of secretion was reduced significantly. With doses of 40 micrograms and 100 micrograms of ipratropium to each nostril a similar reduction in the volume of secretion occurred but a still greater reduction by the application of 200 micrograms of ipratropium when compared with treatment by the placebo. While the volume of secretion increased with each increasing concentration of methacholine, a similar pattern of reduced secretion for each concentration of methacholine was seen with each greater concentration of ipratropium. In patients with vasomotor rhinitis, treatment with ipratropium bromide was found to reduce significantly the hypersecretion induced by methacholine when compared with treatment by the placebo. This reduction was greater with greater doses of ipratropium.
Administration, Inhalation↗
Multiresidue method for the gas chromatographic determination of pesticides in honey after solid-phase extraction cleanup.
A new multiresidue method is described for the determination of pesticides in honey. The method involves dissolution of the honey in a methanol-water mixture, followed by solid-phase extraction cleanup and gas chromatographic determination. Twenty-six pesticides used on flowering field crops, on flowering fruit and vegetables, or as acaricides to control Varroa jacobsoni in beehives are determined by the method. Recoveries from honey, spiked at 0.02-1.6 mg/kg, ranged from 85 to 127% with a relative standard deviation (RSD) of 2-16%, except for the RSD of 27% for captan at 0.05 mg/kg.
Chromatography, Gas↗