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Title: Point-of-care measurement of serum creatinine in the intensive care unit.
Austin Authors: Calzavacca, Paolo;Tee, Augustine;Licari, Elisa;Schneider, Antoine G;Bellomo, Rinaldo 
Affiliation: Department of Intensive Care, Austin Hospital, Heidelberg, Victoria, Australia
Issue Date: 20-Oct-2011
Publication information: Renal Failure 2011; 34(1): 13-8
Abstract: To test the precision and limits of agreement of point-of-care testing (POCT)-based measurement of serum creatinine (Cr) in critically ill patients.We studied 250 paired blood samples from 82 critically ill patients from a general intensive care unit by simultaneous POCT and central laboratory testing (Jaffé method). Correlation, precision, bias, and limits of agreement were assessed. Possible confounders for interference of noncreatinine chromogens were evaluated by multivariate linear regression analysis.The mean difference in serum Cr measured by central laboratory and POCT was +9.6 μmol/L (95% limits of agreement: -11.2 to +30.4 μmol/L). The mean percentage difference between the two techniques was 8.7% (95% limits of agreement -7.8% to +25.1%). On multivariate regression, the difference in serum Cr was increased with greater hemoglobin and lactate levels but decreased with greater bilirubin, albumin, and calcium levels.Compared with the central laboratory testing, POCT-based measurement of serum Cr in critically ill patients carried a small negative bias. This difference appeared affected by the blood levels of biochemical variables known to affect the Jaffé method. POCT-based Cr measurement appears sufficiently accurate for clinical use.
Gov't Doc #: 22011242
DOI: 10.3109/0886022X.2011.623558
Type: Journal Article
Subjects: Adolescent
Aged, 80 and over
Critical Illness
Intensive Care Units
Middle Aged
Point-of-Care Systems
Prospective Studies
Reproducibility of Results
Young Adult
Appears in Collections:Journal articles

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