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  • Articles: DFG German National Licenses  (2)
  • Allogeneic bone marrow transplantation  (1)
  • Apnoea of prematurity; neonato logy  (1)
  • 1
    ISSN: 1432-0584
    Keywords: Allogeneic bone marrow transplantation ; Autologous bone marrow transplantation ; Granulocyte colony-stimulating factor (G-CSF) ; Hematopoietic recovery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The positive role of G-CSF in hastening the myeloid recovery of patients undergoing allogeneic bone marrow transplantation (ALLO-BMT) or autologous bone marrow transplantation (ABMT) has recently been established. Considerable knowledge about adequate doses and route of administration has been accumulated in the past few years. Nonetheless, the optimal time to start growth-factor administration remains undetermined. We have performed a stratified study according to the source of hematopoietic progenitors (ALLO-BMT or ABMT), underlying disease and its stage, and acute graft-versus-host disease (GVHD) prophylaxis regimen and randomized patients in two arms: group A, which started G-CSF on day 0 (36 patients), and group B, which started on day +7 post-BMT (39 patients). The same dose (5 Μg/kg/day) and route of administration were employed in both groups. We found no significant differences in the time to reach an absolute neutrophil count (ANC) of 0.1, 0.5, and 1×109/l and 50×109 platelets/l (medians: 10 and 11, 14.5 and 14, 17 and 16, 23 and 24 days, respectively, in groups A and B). We did not find differences in the days of fever or days on antibiotic treatment with less than 1×109/l ANC, rate of bacteriemia, or days of hospitalization in both groups. In contrast, a considerable saving of GCSF in B group was found (mean days of infusion in group A, 18, versus 11 in group B) (p〈0.0001). This is equivalent to a saving of 1120 $US per patient. Therefore, early use of G-CSF after BMT is useless and more expensive and provides no advantage over delayed administration.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1041
    Keywords: Key words Caffeine ; Apnoea of prematurity; neonato logy ; paediatrics ; population pharmacokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: To determine population pharmacokinetic parameters of caffeine in premature neonates. Methods: This population analysis was done using 145 serum concentration measurements gathered from 75 hospitalized patients during their routine clinical care. The data were analysed by use of NONMEM (mixed effects modelling) according to a one-compartment open model with either zero or first-order absorption and first-order elimination. The effect of a variety of developmental, demographic and clinical factors (gender, birth weight, current weight, gestational age, postnatal age, postconceptional age and concurrent treatment with phenobarbital and parenteral nutrition) on clearance and volume of distribution was investigated. Forward selection and backward elimination regression identified significant covariates. Results: The final pharmacostatistical model with influential covariates were as follows: clearance (ml · h−1) =5.81 · current weight (kg) + 1.22 · postnatal age (weeks), multiplied by 0.757 if gestational age ≤ 28 weeks and 0.836 if the current primary source of patients' nutrition is parenteral nutrition, and volume of distribution (ml) = 911 · current weight (kg). The interindividual variability in clearance and the residual variability, expressed as coefficients of variation, were 14.87% and 18.44%, respectively. Due to the lack of information on the data set we were unable to characterize the interindividual variability for volume of distribution. Conclusion: In this study, which involved on average only two serum concentrations of caffeine per patient, the use of NONMEM gave us significant and consistent information about the pharmacokinetic profile of caffeine when compared with available bibliographic information. Additionally, parenteral nutrition and low gestational age (≤ 28 weeks) may even come to be considered as risk factors, and their presence may serve as an indicator of the need for periodic monitoring of caffeine concentrations in premature infants.
    Type of Medium: Electronic Resource
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