Unequal day-night terbutaline i.v. dosing in acute severe asthma: effect on nocturnal bronchial patency, heart rate, and arterial pressure.
Chronobiol Int
; 8(3): 194-202, 1991.
Article
en En
| MEDLINE
| ID: mdl-1794157
ABSTRACT
Our study investigated the differential effects of continuous or unequal day-night terbutaline dosing on circadian bronchial patency, heart rate, and arterial pressure in severe acute asthma. Forty-five hospitalized asthmatic patients (19 women and 26 men, mean age 45.4 years, mean weight 63.5 kg) were included in this multicenter study. Three groups of patients (corresponding to three dosing schedules) were randomized; the three groups were comparable, since no statistically significant difference was detected in the age, weight, or peak expiratory flow values at the beginning of the study. In order to reach immediately the concentrations of terbutaline corresponding to the desired unequal day-night concentrations, a theoretical pharmacokinetic simulation was done to predict the outcome in terms of the plasma concentrations after the three dosing regimens; the results of this simulation allowed us to calculate the initial bolus dose to be given over 5 min to groups A, B, and C, i.e., 1.47, 2.94, and 4.41 micrograms/kg, respectively. This bolus was given to all patients at 0700 h, the beginning of the study.(ABSTRACT TRUNCATED AT 250 WORDS)
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Asma
/
Terbutalina
/
Presión Sanguínea
/
Bronquios
/
Frecuencia Cardíaca
Tipo de estudio:
Clinical_trials
/
Prognostic_studies
Límite:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Chronobiol Int
Asunto de la revista:
FISIOLOGIA
Año:
1991
Tipo del documento:
Article
País de afiliación:
Francia