Item: WHAT IF WE ARE WRONG? RETHINKING AVALANCHE FATALITIES: TRAUMA, BURIAL PRESSURE, AND THE LIMITS OF HYPOXIA-FOCUSED MITIGATION
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Title: WHAT IF WE ARE WRONG? RETHINKING AVALANCHE FATALITIES: TRAUMA, BURIAL PRESSURE, AND THE LIMITS OF HYPOXIA-FOCUSED MITIGATION
Proceedings: Proceedings, International Snow Science Workshop, Whistler, BC, Canada, 2026
Authors:
- Karsten von Hoesslin [ Raven Rescue, Smithers, Canada ]
Date: 2026-09-28
Abstract: Avalanche fatality research has traditionally identified asphyxia as the leading cause of death among fully buried victims, with trauma accounting for approximately one-quarter of fatalities. A frequently cited Canadian study of 204 avalanche deaths reported that 75% were attributed to asphyxia and 24% to trauma. These figures have subsequently been incorporated into wilderness medicine guidelines, avalanche education, and the rationale for technologies intended to prolong airway patency during burial. However, the underlying mortality data is more than a decade old, and substantial regional variation exists in the relationship between trauma, snow climate, burial conditions, and survival. This raises an important question: what if the prevailing interpretation of avalanche mortality is incomplete? Emerging research using special sensors on a girdle over a mannequin in simulated burials is examining partial pressures exerted by avalanche debris on the thoracic and pelvic regions. This is providing a different perspective on the mechanisms of death following burial. If avalanche debris can generate sufficient pressure to produce clinically significant blunt thoracic or pelvic trauma, some deaths currently conceptualized primarily through the lens of hypoxia may instead involve traumatic pneumothorax, internal haemorrhage, or other life-threatening injuries. This distinction is medically important because maintaining a patent airway cannot prevent death from injuries sustained during the avalanche or burial process. The possibility is especially relevant to maritime and transitional snow climates, where denser snowpacks and forested or irregular terrain have been associated with greater traumatic injury rates. This paper reviews the established evidence concerning avalanche mortality, snow climate, trauma, airway-preservation technologies, and blunt traumatic injury. It argues that avalanche safety education should continue to emphasize rapid rescue and airway management while simultaneously recognizing that avoidance and exposure-based terrain selection remain the most fundamental forms of trauma prevention. If ongoing pressure research confirms that burial forces can independently generate severe thoracic or pelvic injury, avalanche medicine and mitigation strategies may require a broader model of survivability, one that treats trauma prevention and asphyxia prevention as interconnected but distinct objectives.
Object ID: ISSW2026_P1.61.pdf
DOI: https://doi.org/10.15788/1790098869
Language of Article: English
Presenter(s): Karsten Von Hoesslin
Keywords: trauma, asphyxia, hypoxia, pneumothorax, pelvic fracture, haemorrhagic shock
Page Number(s): 2386 - 2391
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