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Korean J Anesthesiol > Volume 55(6); 2008 > Article
Korean Journal of Anesthesiology 2008;55(6):666-669.
DOI: https://doi.org/10.4097/kjae.2008.55.6.666   
The correlation between actual blood concentration of propofol and the difference of estimated lean body mass with actual lean body mass in target controlled infusion.
Suk Whan Choi, Se Hun Lim, Sang Eun Lee, Young Hwan Kim, Jeong Han Lee, Kun Moo Lee, Soon Ho Cheong, Young Kyun Choe, Young Jae Kim, Chee Mahn Shin
Department of Anesthesiology and Pain Medicine, College of Medicine, Inje University, Busan, Korea. anespc@medimail.co.kr
Abstract
BACKGROUND
We evaluated the correlation between the difference of estimated lean body mass (LBM(E)) with actual lean body mass (LBM(A)) and actual blood concentration of propofol, hemodynamic variables and Bispectral index (BIS) during target controlled infusion (TCI) of propofol in Korean female patients who would take total intravenous anesthesia (TIVA) using propofol-remifentanil combination.
METHODS
Eighty Korean women participated in this trial. Demographic data were collected and LBM(A) was measured using body mass analyzer. Target concentration of propofol was set at 6microgram/ml during induction and 3microgram/ml during maintenance. Hemodynamic variables and BIS were measured at 60 minutes after anesthetic induction. Peripheral blood sample was collected from a large forearm vein on the contralateral side of infusion for measurement of whole blood concentration of propofol at 60 minutes after anesthetic induction. Delta lean body mass (delta LBM) was obtained by subtracting LBM(A) from LBM(E). Correlation analyses were done between delta LBM and plasma propofol concentration, blood pressure, and BIS, respectively.
RESULTS
Blood concentrations of propofol were 1.9-6.9microgram/ml. Mean plasma concentration of propofol was higher than target concentration. delta LBM had a positive correlation with actual plasma propofol concentration. delta LBM was not correlated with hemodynamic variables and BIS.
CONCLUSIONS
TCI of propofol resulted in large variation in measured plasma concentration. We thought delta LBM was one of interpatient variation factors of propofol plasma concentration during TCI. We found that TCI of propofol using Schnider model would result in higher blood concentration than target concentration in Korean women.
Key Words: bispectral index; lean body mass; propofol; target controlled infusion
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