The study is aimed at investigation of respiratory gases propagation in snow. The study involves volunteers breathing into the snow whereas concentrations of gases are measured at various positions in the snow.

The study is aimed at investigation of respiratory gases (oxygen and carbon dioxide) propagation in the simulated avalanche snow. The study involves volunteers breathing into the snow whereas concentrations of gases are measured at various positions in the snow. A special apparatus was created for sampling and measurement of gas concentrations and to assure stable geometry of the experiment required for data evaluation.

Inclusion Criteria:

• healthy and fit volunteers, classified as The American Society of Anesthesiologists class I
• without a smoking history

Exclusion Criteria:

• Tiffeneau Index less than 0.70
• any cardiovascular or respiratory condition