Field Internship Student Data Acquisition Project. (FISDAP) Airway Practice Exam

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Which of the following is an early sign of hypoxia?

Cyanosis
Weak pulse
Restlessness
Mental status changes

The correct answer is: Restlessness

Restlessness is indeed recognized as an early sign of hypoxia. When the body does not receive enough oxygen, it can lead to a state of agitation or anxiety. This reaction occurs because the brain is highly sensitive to oxygen levels; as they drop, mental function may begin to deteriorate, causing a person to feel uneasy or restless. This response serves as a warning system, alerting both the individual and caregivers to the presence of hypoxia, facilitating early intervention. Cyanosis, while a sign of hypoxia, typically occurs later as the body's oxygen saturation decreases significantly. A weak pulse might be indicative of various cardiovascular issues, not exclusively hypoxia. Mental status changes, typically seen as confusion or altered consciousness, indicate a more significant level of oxygen deprivation. Therefore, restlessness stands out as the most immediate and detectable early response to low oxygen levels.