![]() ![]() Regression equations fitting blood (Y) and plasma (X) concentration did not deviate from the identity line for K(+) (Y = -0.10 + 0.98 × X), Na(+) (Y = X), and CI(-) (Y = 3.04 + 0.96 × X). The i-STAT results were highly correlated with the Cobas C501 results (r = 0.970, 0.922, and 0.866 for K(+), Na(+), and CI(-), respectively). ![]() Plasma and blood Na(+) concentrations were similar (136.95 versus 136.8 mmol/L). 04) were greater than their concentrations in blood. Plasma concentrations of K(+) (4.39 versus 4.2 mmol/L P <. Blood and plasma electrolyte data were subjected to student t-test for comparison, the concordance analysis for agreement, accuracy, and precision, the Passing-Bablok regression and the Bland-Altman plot for reliability, and receiver operating characteristics curves for sensitivity (Se) and specificity (Sp). In this prospective study, blood samples collected from the jugular vein were processed for determination of K(+), Na(+), and CI(-) concentrations in blood and plasma using the i-STAT and auto-analyzer (Cobas C501), respectively. Ninety-eight cattle with various diseases. To evaluate reliability of the i-STAT, a point-of-care (POC) device, in measuring blood K(+), Na(+), and CI(-) concentrations in cattle. Rapid determination of blood electrolyte concentrations can help determine electrolyte status and delivery of effective volume of electrolyte solutions in field conditions.
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