Analysis of arterial blood gases--a comprehensive approach.

The arterial blood gases is one of the most important investigation for assessment of clinical oxygenation and acid-base status in critically ill patients. It provides us with information about ventilation, oxygenation and acid-base status, the three closely interrelated physiology parameters, which maintain the pH homeostasis. Its correct interpretation and application necessitates the knowledge of basic applied physiology in relation to these parameters. Through this review article an attempt has been made to formulate a comprehensive approach by first describing the basic physiology in relation to these parameters followed by stepwise approach to analyse arterial blood gases.