Hypoxia Recognition Based on Subjective Evaluation
Rozpoznání hypoxie na základě subjektivního hodnocení
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České vysoké učení technické v Praze
Czech Technical University in Prague
Czech Technical University in Prague
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Současný stav oblasti rozpoznání hypoxie není dostatečně rozsáhlý ve sféře civilního letectví, a proto tato práce zkoumá efekty hypoxie na subjektivní hodnocení, subjektivní vnímání a identifikaci hypoxického stavu a symptomů. Hypoxie byla navozena u 23 subjektů, které byly podrobeny kognitivní námaze, podávaly průběžné sebehodnocení a na konec vyplnily dotazník symptomů. Správně identifikovat hypoxii bylo schopno 13 (56,5 %) účastníků. Nejvýznamnějšími symptomy účastníků byly lehkost hlavy, závrať a dušnost. Samotný výskyt symptomů nebyl nutně ukazatelem hypoxického stavu, avšak intenzity 7 nejčastějších ano. Průběžné hodnocení neslo vliv hypoxie pouze v hodnocení celkového stavu a dýchání, nikoliv v hodnocení soustředění.
The current state of the hypoxia recognition field has not been studied extensively enough in the context of civil aviation. Therefore, this thesis investigates signs and symptoms, subjective cognition, and recognition of hypoxia and its effects on subjective evaluation. Hypoxia was induced in 23 subjects who were subjected to a cognitive exercise, administered continuous self-assessment, and finished by answering a signs and symptoms questionnaire. Thirteen (56.5 %) participants were able to identify the hypoxic state. The most significant symptoms registered were light-headedness, dizziness, and air hunger. The appearance of symptoms alone was not deemed an indicator of a hypoxic state, the intensity of the 7 most frequent ones was. The continuous self-assessment was influenced by hypoxia only in the categories of general state and respiration, not in the concentration evaluation.
The current state of the hypoxia recognition field has not been studied extensively enough in the context of civil aviation. Therefore, this thesis investigates signs and symptoms, subjective cognition, and recognition of hypoxia and its effects on subjective evaluation. Hypoxia was induced in 23 subjects who were subjected to a cognitive exercise, administered continuous self-assessment, and finished by answering a signs and symptoms questionnaire. Thirteen (56.5 %) participants were able to identify the hypoxic state. The most significant symptoms registered were light-headedness, dizziness, and air hunger. The appearance of symptoms alone was not deemed an indicator of a hypoxic state, the intensity of the 7 most frequent ones was. The continuous self-assessment was influenced by hypoxia only in the categories of general state and respiration, not in the concentration evaluation.