Giuseppe
Emeritus
[Source: Antimicrobial Agents and Chemotherapy, full page: (LINK). Abstract, edited.]
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Effect of Continuous Venovenous Hemofiltration Dose on the Achievement of Adequate Vancomycin Trough Concentrations
Erin N. Frazee PharmD 1↴, Philip J. Kuper, PharmD 1, Garrett E. Schramm, PharmD 1, Scott L. Larson, PharmD 1, Kianoush B. Kashani, MD 2,3, Douglas R. Osmon, MD 4 and Nelson Leung, MD 2
Author Affiliations: <SUP>1</SUP>Hospital Pharmacy Services, Mayo Clinic, Rochester, MN; <SUP>2</SUP>Division of Nephrology, Mayo Clinic, Rochester, MN; <SUP>3</SUP>Division of Critical Care Medicine, Mayo Clinic, Rochester, MN; <SUP>4</SUP>Division of Infectious Diseases, Mayo Clinic, Rochester, MN
ABSTRACT
The vancomycin dose necessary for the achievement of target serum trough concentrations during continuous venovenous hemofiltration (CVVH) remains to be elucidated. This was a retrospective cohort study of critically ill adults at a tertiary medical center on concurrent CVVH and vancomycin between 2006 and 2010 with a steady state vancomycin trough concentration. The 87 included patients were grouped according to low (≤ 30 mL/kg/h; N = 10) or high (> 30 mL/kg/h; N = 77) CVVH hemofiltration rate (HFR) for analysis. Vancomycin goal trough achievement occurred in only 32 (37%) patients. The primary endpoint of trough attainment significantly differed between HFR subgroups, 90% versus 30% in low and high HFR individuals, respectively (P < 0.001). Patients with subtherapeutic trough concentrations had a median (interquartile range) HFR of 40 (37-47) mL/kg/hr compared to 36 (30-39) mL/kg/hr in those who achieved the trough goal. Irrespective of goal trough, an inverse correlation existed between HFR and serum vancomycin concentration (R = - 0.423; P < 0.001). In the subgroup of 14 methicillin resistant Staphylococcus aureus (MRSA) patients, trough achievement was similar to the aggregate cohort (36%). Mortality at 28 days was unrelated to trough achievement in both the overall sample (P = 0.516) and in culture-positive MRSA patients (P = 0.396). Critically ill patients undergoing CVVH therapy may experience clinically significant reductions in goal vancomycin troughs. The results of this study justify prospective evaluations in this population to determine the optimal vancomycin dosing strategy for attainment of goal trough concentrations.
FOOTNOTES
Corresponding author: Erin N. Frazee, Email address: frazee.erin@mayo.edu
Copyright ? 2012, American Society for Microbiology. All Rights Reserved.
-Author Affiliations: <SUP>1</SUP>Hospital Pharmacy Services, Mayo Clinic, Rochester, MN; <SUP>2</SUP>Division of Nephrology, Mayo Clinic, Rochester, MN; <SUP>3</SUP>Division of Critical Care Medicine, Mayo Clinic, Rochester, MN; <SUP>4</SUP>Division of Infectious Diseases, Mayo Clinic, Rochester, MN
ABSTRACT
The vancomycin dose necessary for the achievement of target serum trough concentrations during continuous venovenous hemofiltration (CVVH) remains to be elucidated. This was a retrospective cohort study of critically ill adults at a tertiary medical center on concurrent CVVH and vancomycin between 2006 and 2010 with a steady state vancomycin trough concentration. The 87 included patients were grouped according to low (≤ 30 mL/kg/h; N = 10) or high (> 30 mL/kg/h; N = 77) CVVH hemofiltration rate (HFR) for analysis. Vancomycin goal trough achievement occurred in only 32 (37%) patients. The primary endpoint of trough attainment significantly differed between HFR subgroups, 90% versus 30% in low and high HFR individuals, respectively (P < 0.001). Patients with subtherapeutic trough concentrations had a median (interquartile range) HFR of 40 (37-47) mL/kg/hr compared to 36 (30-39) mL/kg/hr in those who achieved the trough goal. Irrespective of goal trough, an inverse correlation existed between HFR and serum vancomycin concentration (R = - 0.423; P < 0.001). In the subgroup of 14 methicillin resistant Staphylococcus aureus (MRSA) patients, trough achievement was similar to the aggregate cohort (36%). Mortality at 28 days was unrelated to trough achievement in both the overall sample (P = 0.516) and in culture-positive MRSA patients (P = 0.396). Critically ill patients undergoing CVVH therapy may experience clinically significant reductions in goal vancomycin troughs. The results of this study justify prospective evaluations in this population to determine the optimal vancomycin dosing strategy for attainment of goal trough concentrations.
FOOTNOTES
Corresponding author: Erin N. Frazee, Email address: frazee.erin@mayo.edu
Copyright ? 2012, American Society for Microbiology. All Rights Reserved.
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