The symptom of Hypoxia and Hyperventilation are very similar.

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The symptoms of hypoxia and hyperventilation are similar, but they also differ in every person. While in flight, you notice passenger is showing signs that might indicate hypoxia or hyperventilation, how are you going to help this person?
Hypoxia is defined as a deficiency or insufficiency of oxygen, reaching bodily tissues, especially due to low oxygen concentration in the blood. Hypoxia is characterized by air hunger, headache, loss of color vision, tingling in extremities, cyanosis, apprehension, and euphoria (Widyaningtyas, Nur Hafizhah Nur Hafizhah Widyaningtyas, pp.402-405). The low supply of oxygen into tissues leads to a coordinated downregulation of metabolic demand and supply so that there are no mismatch in adenosine triphosphate (ATP) utilization and production, thereby preventing processes that can contribute to bioenergetic collapse (Wheaton et al., pp.C385-C393). The high-altitude affects human physiology, especially the respiratory system, whereby there is decreasing oxygen saturation in the blood, which causes hypoxia, leading to discomfort (Widyaningtyas, Nur Hafizhah Nur Hafizhah Widyaningtyas, and pp.401)
Hyperventilation is defined as a situation where there is an unconventional increase in the rate and depth of breathing.  It is also called over-breathing, and it may leave you feeling breathless. Emotional and anxious contexts can elicit hyperventilation. Hyperventilation has multiple etiologies, and its centrality of the features is that there is a significant increase in respiratory rate, which causes changes in blood gases, including oxygen and carbon dioxide gases (O2 and CO2) and acid-base chemistry, which is manifested via symptoms (Pevernagie, Dirk, et al. pp.1317-1320). In flights, hyperventilation is caused by stress, panic, anxiety, hypoxia, decreased carbon dioxide in the blood, and positive acceleration, among others. Thus, hyperventilation is associated with the biochemical impact of lowering blood CO2, which is also called hypocapnia and the resulting increase of blood pH, or alkalosis. Due to a cascade of these events, both the central nervous system (CNS) and central cardiovascular system (CVS)are affected, leading to tachycardia, decreased blood flow to the brain owing to vasoconstriction, presence of muscle spasms, and tetany can occur if PaCO2 drops too low (Petrassi, Frank A., et al. .pp.975-984). These CNS and CVS effects can lead to a spectrum of symptoms that include decreased visual acuity, decreased mental functioning, impaired, headache, judgment, nausea, hot or cold sensations, tingling extremities, dizziness, or drowsiness, loss of consciousness belching, dry mouth, and sleepiness (Pevernagie, Dirk, et al. pp.1317-1320). These symptoms are of concern in the aviation industry because they pose a threat to safety.
As seen above, there are similarities between hypoxia and hyperventilation, and most of the symptoms tend to ove...