Adaptation in Neonatology of the Once-Daily Concept of Aminoglycoside Administration: Evaluation of a Dosing Chart for Amikacin in an Intensive Care Unit

Abstract

At day 1 of treatment, there was no correlation between the Ak C1hS and the GA at birth (mean 27.8 +/- 5.21 microgram/ml (+/- 1 SD); median 28; r = -0.003; range 10-40). In the same way, there was no correlation between the first Ak CminS and the GA at birth (mean 3.7 +/- 2.0 microgram/ml (+/- 1 SD); median 3.0; r = -0.33; range 0-10). The lack of correlation between these first observed C1hS and CminS and the GA at birth suggests the validity of our previous established dose regimen recommendations. Analyzing the data between groups, the mean value +/- 1 SD of Ak C1hS at day 1 of treatment was not significantly different (p > 0.05). Concerning the first Ak CminS, a significant difference (p < 0.01) was only observed when comparing groups 1a, 1b and 2 to group 4. However, this significant difference disappeared when comparing the successive next Ak CminS between groups while each interval remained the same, suggesting a positive postnatal maturation of the renal clearance. In the same way, creatininemia showed a significant and normal decrease (p < 0.01) in each group during the first postnatal weeks. Threshold values of BEAPs at 30 dB showed no significant difference (p > 0.05) between the treated groups (preterm group and term group) and the corresponding control groups. While the primary aim of the study was not to test the bactericidal efficacy of this new regimen, the recovery was excellent in 37 babies with proven or highly suspected infectious disease, except in 1 of them who died from septic shock (group B Streptococcus). After 5 years of using this kind of Ak administration in the unit, minimal inhibitory concentration profiles tested in 43 successive bacterial strains collected from inborn patients remained adequate. (ABSTRACT TRUNCATED)