CARDIOLOGIA

SANGRE

SISTEMA CARDIOVASCULAR

PRODUCTOS FARMACEUTICOS

BIBLIOGRAFIA NACIONAL QUIMICA

Blood flow is not constant during the day, not only due to cardiac output variation but to the variable blood flow fraction supplied to the organs. To what extent these variations could affect the relative drug concentration between two different tissues, is the purpose of this work. In order to study that, a device was designed which took into account different fluid flows towards two flasks. Connections between flasks and pump are shown in text (figure 1). At the bottom of each flask a non-miscible liquid (dichloromethane: CH2Cl2, 100 mL, places 2 and 3) with the circulating fluid (water, 1350 mL, places 1, A, B) was placed. Malachite Green (MG) was introduced as solute into the system (place 1,5 mL, 700 mg/L aqueous solution). The pump output was set at 1080 mL/min, serving more fluid (five times) to flask A than to flask B. Samples were drawn from compartments 1, A and B, and from organic compartments, during experiences taking several hours. MG concentrations were colorimetrically measured at 619 nm. Room temperature was between 15–25 °C. CH2Cl2 MG concentration ratio ([2]/[3]) was similar to fluid flow ratio (σ/(1-σ)) all over the experience time. Other experiences changing the stop time, room temperature, CH2Cl2 volumes and places, pump output distribution, led us to different evidences that supported a theoretical model. As a conclusion, the most important feature was that whereas MG concentrations in water (1, A, B) were close, in CH2Cl2 these were very different. So, is drug effect prediction reliable by monitoring free drug concentrations in blood? European Journal of Drug Metabolism and Pharmacokinetics European Journal of Drug Metabolism and Pharmacokinetics Look Inside Article Metrics 3 Citations Co-published with Adis Adis Other actions Export citation Register for Journal Updates About This Journal Reprints and Permissions Add to Papers Share Share this content on Facebook Share this content on Twitter Share this content on LinkedIn

European Journal of Drug Metabolism and Pharmacokinetics v. 28, no. 2, 2003. -- p. 147-153

Springer

2003

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DOI: 10.1007/BF03190504