Comparative polymyxin B pharmacokinetics in patients receiving extracorporeal membrane oxygenation.
J Antimicrob Chemother
; 77(5): 1379-1384, 2022 04 27.
Article
in En
| MEDLINE
| ID: mdl-35134959
ABSTRACT
OBJECTIVES:
To describe polymyxin B pharmacokinetics in patients receiving veno-venous extracorporeal membrane oxygenation (ECMO) in comparison with critically ill patients without ECMO support and to explore potential covariates that could affect the pharmacokinetics in this group of patients. PATIENTS ANDMETHODS:
In 13 critically ill patients on ECMO and in 21 critically ill patients without ECMO support, 6-8 blood samples were collected during 12â h intervals after reaching steady state. Polymyxin B concentration in serum was determined using a previously developed ELISA. Protein binding was assessed by rapid equilibrium dialysis.RESULTS:
In 13 critically ill patients on ECMO who received polymyxin B, the median area under the concentration-time curve over 12â h (AUC0-12h) was 48.38â mg/h/L for the total drug and 14.08â mg/h/L for the free drug. The unbound fraction was 0.35. Total body clearance was 1.16â L/h. In non-ECMO patients, the median AUC0-12h was 34.7â mg/h/L and the median CL was 1.76â L/h. The volume of distribution was significantly lower in ECMO patients (19.7 versus 30.4â L, respectively). We found a moderate negative correlation between the ECMO blood flow rate and AUC0-12h, a strong negative correlation between SOFA score and polymyxin B clearance and a moderate correlation between polymyxin B clearance and renal function in ECMO patients.CONCLUSIONS:
Currently recommended polymyxin B dosage regimens are sufficient for patients receiving ECMO and no dosage increase is required. In our study, polymyxin B exposure was higher in ECMO patients compared with the control group.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polymyxin B
/
Extracorporeal Membrane Oxygenation
Limits:
Humans
Language:
En
Journal:
J Antimicrob Chemother
Year:
2022
Document type:
Article
Affiliation country: