What laboratory value on an ABG suggests a potential need for respiratory support intervention?

A PaO2 of 55 mmHg is indicative of severe hypoxemia, which warrants immediate attention and potential respiratory support intervention. In healthy individuals, normal arterial oxygen tension (PaO2) ranges from approximately 75 to 100 mmHg. A level as low as 55 mmHg suggests that the body is not receiving enough oxygen, which can lead to serious complications, including tissue hypoxia and organ failure.

In contrast, a PaCO2 of 30 mmHg, while it indicates respiratory alkalosis, is not as critical in terms of the need for immediate respiratory support. A pH of 7.45 falls within a normal range, suggesting there is no immediate acid-base disturbance requiring correction through respiratory intervention. Additionally, an HCO3 level of 24 mEq/L is also within the normal range, further indicating no acute metabolic imbalance that would necessitate supportive measures.

Thus, the significantly low PaO2 value clearly establishes the need for intervention to ensure adequate oxygenation and support the respiratory system during acute illness or compromise.