Snow Physical Properties and Human Ventilatory Response
Keywords
Abstract
Dates
| Last Verified: | 02/28/2017 |
| First Submitted: | 03/07/2017 |
| Estimated Enrollment Submitted: | 03/09/2017 |
| First Posted: | 03/16/2017 |
| Last Update Submitted: | 03/09/2017 |
| Last Update Posted: | 03/16/2017 |
| Actual Study Start Date: | 11/30/2013 |
| Estimated Primary Completion Date: | 03/08/2014 |
| Estimated Study Completion Date: | 03/08/2014 |
Condition or disease
Intervention/treatment
Other: Breathing in snow
Phase
Arm Groups
| Arm | Intervention/treatment |
|---|---|
| Experimental: Winter snow First test series breathing in dry snow in winter | |
| Experimental: Intermediate snow Second test series breathing in dry/wet snow in intermediate season | |
| Experimental: Spring snow Third test series breathing in very wet snow in spring |
Eligibility Criteria
| Ages Eligible for Study | 18 Years To 18 Years |
| Sexes Eligible for Study | All |
| Accepts Healthy Volunteers | Yes |
| Criteria | Inclusion Criteria: - Healthy volunteers with an age above 18yr-old, physically active. - Volunteers have been informed and have signed consent. Exclusion Criteria: - Lack of consent. - Chronic previous illness of the respiratory tract or of the cardiovascular system. - Acute disease at or immediately prior to the test (eg, flu-like infection, fever of unknown origin). - Eurac employees. |
Outcome
Primary Outcome Measures
1. SpO2 (%) [Changes from baseline (measurement at 0min) -> snow-breathing phase (5min, 15min, and timepoint immediately before interruption of snow-breathing phase [max 30min]) -> 2.5min and 5min after snow-breathing phase]
Secondary Outcome Measures
1. EtCO2 (mmHg) [Changes from baseline (measurement at 0min) -> snow-breathing phase (5min, 15min, and timepoint immediately before interruption of snow-breathing phase [max 30min]) -> 2.5min and 5min after snow-breathing phase]
2. Cause of interruption [Timepoint immediately before interruption of snow-breathing phase (max 30min)]
3. VE (L/min) [Changes from baseline (measurement at 0min) -> snow-breathing phase (5min, 15min, and timepoint immediately before interruption of snow-breathing phase [max 30min]) -> 2.5min and 5min after snow-breathing phase]
4. rSO2 (%) [Changes from baseline (measurement at 0min) -> snow-breathing phase (5min, 15min, and timepoint immediately before interruption of snow-breathing phase [max 30min]) -> 2.5min and 5min after snow-breathing phase]
