Clinical Chemistry
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Clinical Chemistry 36: 1567-1572, 1990;
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Clinical Chemistry, Vol 36, 1567-1572, Copyright © 1990 by American Association for Clinical Chemistry

New in vitro analytical approaches for clinical chemistry measurements in critical care

ME Meyerhoff
Department of Chemistry, University of Michigan, Ann Arbor 48109.

The effective management of patients in intensive care units, operating rooms, and emergency rooms requires frequent measurement of a select group of analytes, preferably at or near the patient's bedside. Tests recognized as being essential for such management include blood gases and related variables (pH, pO2, pCO2, HCO3-, hematocrit/hemoglobin, O2 saturation), electrolytes (Na+, K+, Ca2+, Cl-), and in some cases, certain metabolites (glucose, lactate, urea, creatinine). This report describes the measurement principles, practical instrumental designs, analytical performance, and limitations of several newer electrochemical sensor-based approaches useful for in vitro determination of these species in undiluted whole-blood samples. Considerable attention is given to the most recent advances in ion- selective electrode technology as they relate to blood gas and electrolyte determinations. Similar attention is given to modern enzyme- electrode techniques, which are useful for direct measurements of metabolites in whole blood. The challenges of integrating these new analytical methods into convenient, multi-analyte, user-friendly, bedside or stat-lab instruments are also discussed.


The following articles in journals at HighWire Press have cited this article:


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M. T. Halpern, C. S. Palmer, K. N. Simpson, F. D. Chesley, B. R. Luce, J. P. Suyderhoud, B. V. Neibauer, and F. G. Estafanous
The Economic and Clinical Efficiency of Point-of-Care Testing for Critically Ill Patients: A Decision-Analysis Model
American Journal of Medical Quality, March 1, 1998; 13(1): 3 - 12.
[Abstract] [PDF]

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M. Salem, B. Chernow, R. Burke, J. Stacey, M. Slogoff, and S. Sood
Bedside Diagnostic Blood Testing: Its Accuracy, Rapidity, and Utility in Blood Conservation
JAMA, July 17, 1991; 266(3): 382 - 389.
[Abstract] [PDF]


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