Vancomycin AUC values estimated with trough-only data: Accuracy in an adult academic medical center population.

Autor: Arensman Hannan KN; Department of Pharmacy, Mayo Clinic Health System - Mankato, Mankato, MN, USA., Rivera CG; Department of Pharmacy, Mayo Clinic, Rochester, MN, USA., Fewel N; Department of Pharmacy, Central Texas Veterans Health Care System, Temple, TX, USA.
Jazyk: angličtina
Zdroj: American journal of health-system pharmacy : AJHP : official journal of the American Society of Health-System Pharmacists [Am J Health Syst Pharm] 2023 Mar 21; Vol. 80 (7), pp. 452-456.
DOI: 10.1093/ajhp/zxac372
Abstrakt: Purpose: Vancomycin area under the concentration-time curve (AUC) can be calculated using steady-state serum peak and trough concentrations; however, compared to traditional trough-only monitoring, this approach requires an additional blood sample. Recently published data demonstrated vancomycin AUC estimations using trough-only data with a volume of distribution (Vd) model incorporating age and actual body weight were reasonably accurate and precise in a veteran population. This study sought to extend these methods to a Mayo Clinic adult population.
Methods: A retrospective, observational cohort of adult patients with documented steady-state vancomycin peak and trough concentrations was evaluated. Vancomycin AUCs were estimated using trough-only data, and 4 Vd models were assessed for accuracy and precision. Estimated AUCs were compared to AUCs calculated using 1-compartment intermittent infusion equations and steady-state peak and trough ("peak-trough") data.
Results: The study population (N = 95) was 46% female, with a median age of 59 years and a median weight of 97 kg. Using the VancoPK equation Vd = 0.29 (age in y) + 0.33 (actual weight in kg) + 11, the mean peak-trough and estimated trough-only AUC were 533 and 534, respectively, with a correlation of 0.936. The root mean square error was 47.7, meaning about 95% of AUCs were within 95 mg · h/L of peak-trough AUCs.
Conclusions: Accuracy and precision of Vancomycin AUC estimations using trough-only data and the described Vd model were demonstrated in a Mayo Clinic cohort. Targeting an estimated AUC of 500 mg · h/L using the VancoPK model would likely result in an actual AUC within 400 to 600 mg · h/L.
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Databáze: MEDLINE
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