Which of the following is NOT listed as a sign of hypoxia?

Which of the following is NOT listed as a sign of hypoxia?

• A. Sudden boiling of hot liquids
• B. Euphoria
• C. Visual and auditory disorders
• D. Pain in ears and sinuses

Answer: (A)

Hypoxia deprives body tissues, especially the brain and sensory systems, of oxygen, so signs reflect how the CNS and senses are affected. Euphoria happens as judgment and perception are altered by reduced brain oxygen—we see it as an early warning sign in pilots. Visual and auditory disturbances appear because the retina, optic pathways, and inner ear are sensitive to oxygen levels, leading to blurred vision, tunnels of sight, or hearing changes. Pain in the ears and sinuses can occur with altitude-related physiological changes and congestion in the sinus area, which can accompany hypoxia symptoms. Sudden boiling of hot liquids doesn’t have a physiological basis as a hypoxia sign, so it wouldn’t be used to recognize oxygen deprivation.

Hypoxia deprives body tissues, especially the brain and sensory systems, of oxygen, so signs reflect how the CNS and senses are affected. Euphoria happens as judgment and perception are altered by reduced brain oxygen—we see it as an early warning sign in pilots. Visual and auditory disturbances appear because the retina, optic pathways, and inner ear are sensitive to oxygen levels, leading to blurred vision, tunnels of sight, or hearing changes. Pain in the ears and sinuses can occur with altitude-related physiological changes and congestion in the sinus area, which can accompany hypoxia symptoms. Sudden boiling of hot liquids doesn’t have a physiological basis as a hypoxia sign, so it wouldn’t be used to recognize oxygen deprivation.