Study Results
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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COMPLETED
NA
58 participants
INTERVENTIONAL
2013-01-31
2016-02-29
Brief Summary
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1. An algorithm can be developed which predicts cognitive performance in immersed exercising divers, based on the exhaled carbon dioxide (PETCO2) and the diver's inspired partial pressures of oxygen and nitrogen (PIO2 and PIN2).
2. PETCO2 using mass spectrometry is an accurate estimate of arterial carbon dioxide (PaCO2) at rest and during immersed exercise and can be used as a PaCO2 surrogate at levels exceeding 50 mmHg and depths up to 158 fsw (gas density 6.4 g/l, similar to 165 fsw density of 6.8 g/l).
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
BASIC_SCIENCE
NONE
Study Groups
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dive to 122 feet, no exercise
Subjects will undergo a simulated dive to a maximum depth of 122 feet of seawater with no exercise at depth
NO exercise at depth
Subjects will NOT exercise while at depth
dive to 158 feet, no exercise
Subjects will undergo a simulated dive to a maximum depth of 154 feet of seawater with no exercise at depth
NO exercise at depth
Subjects will NOT exercise while at depth
dive to 122 feet, exercise
Subjects will undergo a simulated dive to a maximum depth of 122 feet of seawater with exercise at depth
exercise at depth
Subjects will exercise while at depth
dive to 158 feet, exercise
Subjects will undergo a simulated dive to a maximum depth of 154 feet of seawater with exercise at depth.
exercise at depth
Subjects will exercise while at depth
Interventions
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NO exercise at depth
Subjects will NOT exercise while at depth
exercise at depth
Subjects will exercise while at depth
Eligibility Criteria
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Inclusion Criteria
* male,
* age greater than 18,
* age less than 50
Exclusion Criteria
* asthma,
* cardiac disease,
* inability to pedal a bicycle ergometer,
* inability to perform vigorous exercise
18 Years
50 Years
MALE
Yes
Sponsors
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Duke University
OTHER
Responsible Party
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Principal Investigators
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John J Freiberger, MD
Role: PRINCIPAL_INVESTIGATOR
Duke University
Locations
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Duke Center for Hyperbaric Medicine and Environmental Physiology
Durham, North Carolina, United States
Countries
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Other Identifiers
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SPS 181258
Identifier Type: REGISTRY
Identifier Source: secondary_id
Pro00036937
Identifier Type: -
Identifier Source: org_study_id
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