Collection and handling of samples: effects on blood gases, Na, K, ionized Ca, Mg, lactate, and phosphate analyses

Nov 21, 2021 by in CRITICAL CARE Comments Off on Collection and handling of samples: effects on blood gases, Na, K, ionized Ca, Mg, lactate, and phosphate analyses

Sources of preanalytical errors in blood gas and electrolyte testing Introduction There are numerous sources of preanalytical errors in laboratory testing. Among these are the following: • Wrong test ordered…

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Quality control in blood gas and critical care testing

Nov 21, 2021 by in CRITICAL CARE Comments Off on Quality control in blood gas and critical care testing

Routine daily quality control on blood gas instruments Most current blood gas/electrolyte/metabolite analyzers have onboard internal quality control (QC) systems that automatically monitor the stability and performance of reagents, electrodes,…

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Lactate physiology and diagnostic evaluation

Nov 21, 2021 by in CRITICAL CARE Comments Off on Lactate physiology and diagnostic evaluation

Introduction By 1900, many physicians had noted metabolic acidosis in patients who were critically ill. In 1925, Clausen identified increased lactate along with acidosis in these patients, which gave rise…

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Phosphate physiology and clinical evaluation

Nov 21, 2021 by in CRITICAL CARE Comments Off on Phosphate physiology and clinical evaluation

Introduction Symptoms of phosphate depletion have been described through the years, from the times of the ancient Romans to observations by veterinarians on livestock. Phosphate compounds are in all cells…

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