comparability of results between a point-of-care and an automated instrument for measurement of b-type natriuretic peptide

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ID: 218276
2010
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Abstract
Objectives: Heart failure is one of the leading causes of death in the U.S. The incorporation of B-type natriuretic peptide (BNP) measurements when triaging patients presenting with shortness of breath has improved the diagnostic and prognostic ability of physicians. Currently, there are no point-of-care systems for quantifying BNP that can be used without sacrificing accuracy. We compared the analytical performance of the Abbott i-STAT analyzer, a handheld point-of-care system for measuring BNP, with the lab-based system, the Abbott ARCHITECT.Methods: One-hundred fifty samples were collected from three clinical settings: 41 from the Emergency Department, 58 from the inpatient wards, and 51 from heart failure outpatient clinics. Linear regression and bias difference analyses were run to evaluate the accuracy of the i-STAT. Correlation between the i-STAT and Architect BNP values were made with values of BNP.Results: The correlation coefficient was r=0.977 (N=150, p<.0001). The average bias was significant (-36) and there were concentration-dependent differences at higher BNP values. Precision of the i-STAT was poor compared to the lab-based platform.Conclusion: Although the precision of the i-STAT was poor, there was good clinical agreement between the i-STAT and the lab-based platform. [West J Emerg Med. 2010; 11(1):44-48].
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kevin2010westerncomparability Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Kevin Shah, Garrett J Terracciano, Kevin Jiang, Alan S Maisel, Robert L Fitzgerald
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Journal lwt
Year 2010
DOI
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URL
http://escholarship.org/uc/item/4qj8k661
Keywords
heart failure critical care first aid intensive care

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