What is the consequence of prolonged respiratory failure?

Prolonged respiratory failure can lead to critical complications, one of which is the potential loss of consciousness. This occurs because insufficient respiratory function results in inadequate oxygenation of the blood. When the body does not receive enough oxygen (a condition known as hypoxia), brain function can be significantly impaired. The brain is highly dependent on a consistent supply of oxygen; without it, neurological functions can deteriorate rapidly, leading to confusion, unconsciousness, or even coma if oxygen deprivation continues.

In contrast, the other options do not align with the physiological consequences of prolonged respiratory failure. Full recovery without complications is unlikely without proper intervention and support. Adequate oxygen delivery is not typically a consequence of respiratory failure, as the condition causes the opposite effect. Similarly, prolonged respiratory failure would not lead to increased oxygen saturation; in fact, oxygen saturation levels would likely decrease, indicating a severe impairment in the body's ability to oxygenate blood effectively.