An interventional study of extreme hypercapnia induced by ventilation insufficiency in Accident Caused by Snow Avalanche, sponsored by Czech Technical University in Prague. Enrolling by invitation at 1 site in Czechia. Open to participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-03-02.
Sponsored by Czech Technical University in Prague · Not applicable, Interventional, and Basic science
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.
156 studies on the registry are indexed under Hypercapnia; 31 are open to participants now.
This study's planned enrollment of 50 is above the median of 36 across 120 interventional studies indexed under Hypercapnia.
Browse Hypercapnia studies →Czech Technical University in Prague is the lead sponsor of 36 studies on the registry; 6 are open to participants now.
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Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.
ASA physical status
The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Breathing in the snow using a specially designed apparatus and measuring the respiratory gases distribution in snow.
Other: extreme hypercapnia induced by ventilation insufficiency
Re-breathing of gas by breathing into the simulated avalanche snow
The length of breathing
Time to termination of the breathing experiment due to the decision of the tested subject, or determined by high end-tidal carbon dioxide value or by the order by the clinician assessing the health status of the subjects.
Time frame: Continuously within up to 20 minute interval from the beginning of the breathing experiment
Plan to share: No
Started Feb 2022 (actual). Primary completion is estimated for May 2025, 39 months after the start.
Of 50 non-industry interventional studies with no phase under Hypercapnia, half reached primary completion within 13 months of starting (the median), counting those still running; a quarter within 7 and three quarters within 32. This study's planned 39 months is above that.
Counting every sponsor, half of 54 studies reached it within 14 months; a quarter within 7 and three quarters within 32.
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Czech Technical University in Prague