Objective. To determine the accuracy of Point-Of-Care testing (PoCT) creatinine values when compared to standard central\nlaboratory testing (IDMS) and to demonstrate if and how a discrepancy could lead to improper risk stratification for contrast\ninduced nephropathy (CIN). Methods. We conducted a descriptive retrospective chart review of patients seen in the Emergency\nDepartment of a single suburban, community, and academic medical center.We included patients who presented to the department\nbetweenMarch 2013 and September 2014who had blood samples analyzed by both PoCT and IDMS. Results.Mean IDMScreatinine\nvalues were 0.23mg/dL higher when compared with i-Stat values. 95% of the time, the IDMS creatinine value was variable and\nranged from âË?â??0.45mg/dL to +0.91mg/dL when compared to the i-Stat creatinine.When using i-Stat creatinine values to calculate\nGFR, 47 out of 156 patients had risk category variations compared to using the IDMS value. This affected 30.1% of the total\neligible sample population (22.9% to 37.3% with 95% CI). Conclusion.We found a significant discrepancy between PoCT and IDMS\ncreatinine values and found that this discrepancy could lead to improper risk stratification for CIN.
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