Changes in systemic carbon dioxide levels during simulated avalanche burial using a one-way valve device: a randomized, double-blind, crossover trial.

INTRODUCTION: monitoring. METHODS: . Termination occurred i) per protocol after max. 45minutes, ii) when predefined safety criteria were surpassed, iii) per participant request. RESULTS: -increase per timespan (+0.10 vs. +1.13mmHg/min). In addition, burial time was markedly prolonged (44.3 vs. 6.4min), and desaturation was prevented (96% vs. 75%) by the AAPD. CONCLUSIONS: accumulation and progressive oxygen depletion of the surrounding snow.