Impact of Commercialisation of Extreme Mountaineering on High-Altitude Hypoxia, Pharmacological Prophylaxis, and Risk Management on Mount Everest: A Narrative Review
DOI:
https://doi.org/10.12775/QS.2026.76.75522Keywords
commercial mountaineering, Mount Everest, high-altitude hypoxia, acute mountain sickness, crowding, pharmacological prophylaxis, risk managementAbstract
Background. The commercialization of extreme high-altitude mountaineering on Mount Everest has fundamentally expanded access to the "death zone" (>8000 m), exposing non-acclimatized climbers to profound physiological vulnerabilities.
Aim. This narrative review synthesizes the pathophysiological consequences, pharmacological prophylaxis, and risk management challenges associated with summit-day crowding and extended static delays.
Materials and Methods. A systematic search of PubMed/MEDLINE, Google Scholar, Scopus, and Web of Science was conducted up to mid-2026. A total of 38 peer-reviewed publications evaluating extreme-altitude physiology and expedition logistics were selected for qualitative synthesis.
Results. While commercial expeditions reduce baseline mortality risk by 37%, crowding creates severe bottlenecks that exhaust finite supplemental oxygen. This trigger causes rapid multi-system collapse characterized by acquired long QT syndrome, hypoxia-driven inflammatory high-altitude pulmonary edema (HAPE), and severe dehydration. Furthermore, widespread prophylactic abuse of dexamethasone acts as a dangerous chemical substitute for acclimatization, masking deterioration and impairing rational judgment.
Conclusions. Mortality in the death zone represents a systemic failure of a fragile technological buffer rather than a direct consequence of commercialization itself. To mitigate these catastrophic risks, the industry must integrate targeted pre-expedition clinical screening, standardized medical literacy, and objective high-altitude triage protocols.
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