Correlation of antimicrobial fraction unbound and sieving coefficient in critically ill patients on continuous renal replacement therapy: a systematic review.
J Antimicrob Chemother
; 77(2): 310-319, 2022 02 02.
Article
em En
| MEDLINE
| ID: mdl-35107138
ABSTRACT
BACKGROUND:
Fraction unbound has been used as a surrogate for antimicrobial sieving coefficient (SC) to predict extracorporeal clearance in critically ill patients on continuous renal replacement therapy (CRRT), but this is based largely on expert opinion.OBJECTIVES:
To examine relationships between package insert-derived fraction unbound (Fu-P), study-specific fraction unbound (Fu-S), and SC in critically ill patients receiving CRRT.METHODS:
English-language studies containing patient-specific in vivo pharmacokinetic parameters for antimicrobials in critically ill patients requiring CRRT were included. The primary outcome included correlations between Fu-S, Fu-P, and SC. Secondary outcomes included correlations across protein binding quartiles, serum albumin, and predicted in-hospital mortality, and identification of predictors for SC through multivariable analysis.RESULTS:
Eighty-nine studies including 32 antimicrobials were included for analysis. SC was moderately correlated to Fu-S (R2â=â0.55, Pâ<â0.001) and Fu-P (R2â=â0.41, Pâ<â0.001). SC was best correlated to Fu-S in first (<69%) and fourth (>92%) quartiles of fraction unbound and above median albumin concentrations of 24.5 g/L (R2â=â0.71, Pâ=â0.07). Conversely, correlation was weaker in patients with mortality estimates greater than the median of 55% (R2â=â0.06, Pâ=â0.84). SC and Fu-P were also best correlated in the first quartile of antimicrobial fraction unbound (R2â=â0.66, Pâ<â0.001). Increasing Fu-P, flow rate, membrane surface area, and serum albumin, and decreasing physiologic charge significantly predicted increasing SC.CONCLUSIONS:
Fu-S and Fu-P were both reasonably correlated to SC. Caution should be taken when using Fu-S to calculate extracorporeal clearance in antimicrobials with 69%-92% fraction unbound or with >55% estimated in-hospital patient mortality. Fu-P may serve as a rudimentary surrogate for SC when Fu-S is unavailable.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Terapia de Substituição Renal Contínua
/
Anti-Infecciosos
Tipo de estudo:
Prognostic_studies
/
Systematic_reviews
Limite:
Humans
Idioma:
En
Revista:
J Antimicrob Chemother
Ano de publicação:
2022
Tipo de documento:
Article