Disposition of Intravenous Theophylline in Asthmatic Children:Bayesian Approach vs Direct Pharmacokinetic Calculations

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Fifteen children (mean age ±SD: 6.4±3.4, range: 2-12 years) with an acute asthma attack were treated by an intravenous dosage regimen of theophylline (30 min loading infusion of 6 mg/kg body weight followed by a constant infusion of 1 mg/kg, twice for 6 hr each). Three blood samples were drawn (each 15 min after the bolus infusion and after the two infusion periods of 6 hr). Plasma clearance (CL), apparent volume of distribution (Vd) and elimination half-life (t<sub>1/2</sub>) were estimated by the Bayesian approach using either only the first peak level (Bay 1) or all three monitored concentrations (Bay 3). These values were compared to the parameters calculated by a standard pharmacokinetic procedure (SC). Therapeutic steady state plasma levels around 12 μg/ml were rapidly achieved, and the pharmacokinetic parameters (CL =1.1-1.5 ml/min/kg, Vd = 0.44 0.501/kg, t<sub>1/2</sub> = 3.5 5.4 hr) differed slightly between the 3 methods applied. There was a significant linear correlation between the Bayesian-derived and SCderived pharmacokinetic parameters. However the method Bay 1 seems to overestimate the elimination rate of theophylline more than Bay 3 does. In conclusion, Bayesian-based therapeutic plasma level monitoring (Bay 3 are better than Bay 1) can be utilized for individualized pharmacokinetic calculations and proper dosage predictions of theophylline in pediatric patients.

収録刊行物

  • The Japanese journal of pharmacology

    The Japanese journal of pharmacology 75(1), 13-20, 1997-09-01

    The Japanese Pharmacological Society

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各種コード

  • NII論文ID(NAID)
    10008679611
  • NII書誌ID(NCID)
    AA00691188
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00215198
  • NDL 記事登録ID
    4307640
  • NDL 雑誌分類
    ZS51(科学技術--薬学)
  • NDL 請求記号
    Z53-D199
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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