Hypercapnia and Gas Exchange Under the Avalanche Snow Model (HyperAvaSM)

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

12 participants

Study Classification

INTERVENTIONAL

Study Start Date

2012-03-31

Study Completion Date

2012-03-31

Brief Summary

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The aim of the study is to investigate respiratory parameters of a person in the simulated avalanche snow and consequent use of the measured data for development of a mathematical-physical model of breathing during increasing hypercapnia in the avalanche.

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Detailed Description

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The study is a part of a university research project aimed at studying physiological conditions and development of breathing parameters of a person breathing in the simulated avalanche snow. Presence of an air pocket and its size play an important role in survival of victims buried in the avalanche snow. Even small air pockets facilitate breathing, yet they do not provide a significant amount of fresh air for breathing. The investigators hypothesize that the size of the air pocket significantly affects the airflow resistance and work of breathing. The aim of the study is to investigate the effect of the air pocket volume on gas exchange and work of breathing in subjects breathing into the simulated avalanche snow and to test, whether it is possible to breathe with zero air pocket.

Conditions

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Accident Caused by Snow Avalanche

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

DOUBLE

Participants Investigators

Study Groups

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air pocket

Breathing in the simulated avalanche snow.

Group Type EXPERIMENTAL

Breathing in the simulated avalanche snow.

Intervention Type OTHER

Breathing in the simulated avalanche snow with zero air pocket and one-liter air pocket.

air pocket

Intervention Type DEVICE

Zero air pocket or one-liter air pocket in the snow.

Interventions

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Breathing in the simulated avalanche snow.

Breathing in the simulated avalanche snow with zero air pocket and one-liter air pocket.

Intervention Type OTHER

air pocket

Zero air pocket or one-liter air pocket in the snow.

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* Participants were volunteers from the Czech Army forces, studying at the Military Department of the Faculty of Physical Education and Sport, Charles University in Prague. All subjects were healthy and fit, classified as ASA I, all without a smoking history. The volunteers were highly motivated to participate in the experiment. The entrance examination, completed before the start of the study, included these tests: electrocardiography, blood pressure, spirometry, and assessment of the health conditions and family anamnesis by a physician with a specialty in anesthesia and critical care.

Minimum Eligible Age

20 Years

Maximum Eligible Age

30 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

Yes