Which condition is suggested by hypoxia along with respiratory alkalosis in ABG results?

Hypoxia accompanied by respiratory alkalosis in arterial blood gas (ABG) results is suggestive of a pulmonary embolus. When a pulmonary embolus occurs, it obstructs blood flow in the pulmonary arteries, leading to impaired gas exchange and resultant hypoxia. Patients may hyperventilate as a compensatory mechanism in response to the perceived lack of oxygen, resulting in respiratory alkalosis due to a decrease in carbon dioxide levels from excessive breathing.

Other conditions such as chronic bronchitis, pneumonia, and congestive heart failure may also lead to hypoxia; however, they typically present with different acid-base imbalances, such as respiratory acidosis, due to impaired ventilation or alveolar function. Thus, the combination of hypoxia and respiratory alkalosis is particularly indicative of a pulmonary embolus.