Table of contents
Blood gas analysis
Blood gas analysis is a common diagnostic tool to correctly interpret most of the respiratory, circulatory, and metabolic derangements through arterial and pulmonary/central venous blood gas and electrolyte analysis.
Blood gas analysis is used for the assessment of shunt fraction, pulmonary dead space, and respiratory, hemodynamic and metabolic relationship allowing for diagnosis and monitoring of critically ill patients.
Blood gas analysis is performed either through the arterial, central venous, or dual sampling of blood to assess oxygenation status, ventilatory and respiratory status, metabolic acid-base equilibrium disorders helping in the diagnosis and monitoring of patients in emergency departments and ICUs.
Prognosis and risk of recurrence
Blood gas analysis is not associated with increased mortality.
The following summarized guidelines for the evaluation of blood gas analysis are prepared by our editorial team based on guidelines from the American Association for Respiratory Care (AARC 2013).
General principles: obtain blood gas analysis and hemoximetry to evaluate a patient's ventilatory, acid-base, and/or oxygenation status.
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More topics in this section
Assessment of oxygenation
Assessment of ventilation