What mmHg level indicates severe hypoxemia?

Severe hypoxemia is characterized by critically low levels of oxygen in the blood, which can lead to significant health complications if not addressed. A partial pressure of oxygen (PaO2) less than 40 mmHg indicates severe hypoxemia. This level signifies that the body's tissues and organs are not receiving adequate oxygenation, which can result in symptoms such as confusion, restlessness, or lethargy, and may ultimately lead to life-threatening situations.

In clinical practice, recognizing these levels is essential for implementing appropriate interventions, such as supplemental oxygen or mechanical ventilation, to restore adequate oxygenation. Understanding this threshold is fundamental for healthcare providers in managing respiratory conditions and making informed decisions regarding patient care.