Evaluation of Gas Propagation in Snow During Breathing of Subjects Under Simulated Avalanche Snow (GasProp)

Czech Technical University in Prague

Status: Invitation-only

Conditions: Accident Caused by Snow Avalanche

Treatments: Other: extreme hypercapnia induced by ventilation insufficiency

Study type: Interventional

Funder types: Other

Identifiers

NCT05262894

2022-Bradler

Details and patient eligibility

About

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.

Full description

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.

Enrollment: 50 estimated patients

Sex: All

Ages: 18 to 50 years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Basic Science

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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50 participants in 1 patient group

Breathing in the snow

Experimental group

Description:

Breathing in the snow using a specially designed apparatus and measuring the respiratory gases distribution in snow.

Treatment:

Other: extreme hypercapnia induced by ventilation insufficiency