Istat potassium12/19/2023 ![]() ![]() Our study has shown the i-STAT system to be reliable, robust, and simple to operate. The analytical performance of the i-STAT was deemed acceptable by calculation of total error and comparison with published performance standards. The standard error about the regression line (Sy/x) ranged from 0.017 for hematocrit to 2.262 for chloride in the assay of venous blood, whereas in the assay of capillary blood the Sy/x ranged from 0.018 for hematocrit to 0.755 for glucose. Linear regression analysis revealed minimal systematic errors. Total imprecision as expressed by the coefficient of variation (CV) was less than 3.5% for all analytes at both high and low concentration except for a low concentration of urea where a CV of 9.4% was obtained. Linearity was obtained over the clinically relevant range for all analytes. The accuracy of the i-STAT system was judged by assay of patient specimens obtained both by venipuncture and fingerprick and correlated with the Kodak Ektachem 700XR and the microhematocrit methods. Linearity and imprecision in hematocrit measurement were assessed using whole blood, while that for the other analytes were evaluated with aqueous solutions. To evaluate the analytical performance of the i-STAT system, which is designed for point of care testing and employs a hand-held chemistry analyzer and disposable cartridges, which in the configuration tested, are capable of measuring sodium, potassium, chloride, urea, glucose, and hematocrit in approximately 65 microL of blood in 90's. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |