The fate of phenobarbitone in children in hypothermia and at normal body temperature
- 1 January 1982
- journal article
- research article
- Published by Springer Nature in Canadian Journal of Anesthesia/Journal canadien d'anesthésie
- Vol. 29 (1) , 16-23
- https://doi.org/10.1007/bf03007942
Abstract
Four critically injured children receiving large doses of phenobarbitone were studied during hypothermia (30°–31°C) and at normal body temperature. The volume of distribution of phenobarbitone varied from 0.79 to 1.01 litres per kg and the serum té ranged from 36.8 ± 9.4 to 86.2 ± 10.5 hrs. The percentage of dose recovered in urine in 16 days ranged from 40.5 to 65.5 pecrent: 2.7 to 12.4 percent as hydroxyphenobarbitone, 1.7 to 19.7 percent as conjugated hydroxyphenobarbitone, 6.0 to 22.4 percent as phenobarbitone-N-glucoside and 17.8 to 23.1 percent as unchanged drug. After the body temperature was allowed to return to normal the rate of excretion of metabolites increased substantially and the rate of excretion of the unchanged drug decreased markedly. It is concluded that reduction in body temperature influences the volume of distribution, rate of metabolism and excretion of phenobarbitone. On a étudié quatre jeunes blessés graves recevant du phenobarbitone à hautes doses en hypothermie (30°–31°C) et à température normale. Le volume de distribution du phénobarbitone a varié de 0.79 à 1.01 litre par kg et la t1/2 sérique s’est située entre 36.8 ± 9.4 et 86.2 ± 10.5 heures. Le pourcentage de la dose recouvrée dans l’urine en 16 jours a été de 40.5 à 65.5 pour cent: 2.7 à 12.4 pour cent sous forme d’hydroxyphenobarbitone, de 1.7 à 19.7 pour cent sous forme d’hydroxyphenobarbitone conjugué, de 6.0 à 22.4 pour cent sous forme de phenobarbitone-N-glucoside et de 17.8 à 23.1 pour cent sous forme inchangée. Lorsqu’on a laissé la température revenir à la normale, la vitesse d’excrétion des métabolites a augmenté substantiellement alors que l’excrétion sous forme inchangée a subit une baisse importante. On en conclut que la baisse de température de l’organisme a influencé le volume de distribution, la vitesse du métabolisme et de l’excrétion du phenobarbitone.This publication has 20 references indexed in Scilit:
- Once daily doses of phenobarbital in childrenThe Journal of Pediatrics, 1980
- A method for the study of N-Glucosidation invitro— amobarbital-N-glucoside formation in incubations with human liverBiochemical Pharmacology, 1980
- Cerebral salvage in near-drowning following neurological classification by triageCanadian Journal of Anesthesia/Journal canadien d'anesthésie, 1980
- Near-drowning in cold fresh water: current treatment regimenCanadian Journal of Anesthesia/Journal canadien d'anesthésie, 1978
- PHENOBARBITAL METABOLISM IN ADULTS AND IN NEWBORN INFANTSActa Paediatrica, 1978
- Pharmacokinetics of phenobarbital in childhoodEuropean Journal of Clinical Pharmacology, 1977
- Drug metabolism in the human neonateLife Sciences, 1975
- Quantitation of phenobarbital and its main metabolites in human urineEuropean Journal of Clinical Pharmacology, 1975
- Excretion of Phenobarbitone in Urine after Intake of Large DosesActa Pharmacologica et Toxicologica, 1969
- Quantitative Underwater Study of Benthic Communities Inhabiting Kelp Beds off CaliforniaScience, 1956