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Digitale Medien

Intrapatient variation in tobramycin kinetics in low birth weight infants during first postnatal week (1984)

Nahata, M. C. ; Powell, D. A. ; Durrell, D. E. ; [weitere]

Springer

European journal of clinical pharmacology 26 (1984), S. 647-649

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Details

ISSN: 1432-1041

Schlagwort(e): tobramycin ; newborn infants ; intrapatient variations ; pharmacokinetics

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie , Medizin

Notizen: Summary Nineteen newborn infants receiving tobramycin, 2.5 mg/kg every 12 h were studied on two occasions at steady-state during the first week of postnatal age. The two studies were separated by two to four days. Total body clearance of tobramycin averaged 1.15 and 1.14 ml/min/kg (p〉0.05), apparent volume of distribution averaged 0.82 and 0.68 l/kg (p〉0.05), and elimination half-life averaged 8.6 and 7.1 h (p〉0.05), during the first and second study, respectively. When the data were further analyzed based on the birth weight, tobramycin kinetics changed during the second study compared to the first study in very low birth weight infants. In eight infants ⩽1.5 kg birth weight, although total clearance of tobramycin was similar, the average apparent volume of distribution decreased from 1.04 l/kg during the first study to 0.73 l/kg during the second study (p〈0.05) and elimination half-life from 11.1 h during the first study to 8.7 h during the second study (p〈0.05). These data indicate that these infants may require a change in dosing interval with continued tobramycin therapy during the first week of postnatal age. Intrapatient variation in tobramycin kinetics should be considered, in addition to the interpatient variation reported previously, when monitoring the serum concentration to individualize tobramycin therapy in newborn infants ⩽1.5 kg birth weight.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00543504

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