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NCT01782625 · ClinicalTrials.gov registry record · NA
Hypercapnia: Cognitive Effects and Monitoring
A NA study, sponsored by Duke University.
- Completed
- Registry status
- NA
- Development phase
- 58
- Enrollment target
NCT01782625: Completed NA study, sponsored by Duke University.
NCT01782625 is a NA study that has completed, run by Duke University. The registered enrollment target is 58 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (96% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT01782625, a NA study, has completed, sponsored by Duke University.
- COMPLETED
- Registry status
- NA
- Development phase
- 58 participants
- Enrollment target
Study Summary
The investigators will simulate the conditions of a working, helmeted diver by using exercising, "head out" immersed subjects to test the following hypotheses: 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).
Primary Outcome
Subjects will undergo computerized cognitive testing before, during and after a simulated dive in the Duke Hyperbaric Chamber. Different exercise conditions (rest or exercise) and different breathing gas mixtures (added carbon dioxide or not)will be assessed and compared to the pre-dive conditions.
Interventions
- OTHER NO exercise at depth
- OTHER exercise at depth
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 58 participants |
| Start Date | 2013-01 |
| Est. Completion | 2016-02 |
| Phase | NA |
What the finished NCT01782625 record still lists
NCT01782625 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 58 participants, a relatively small participant target, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (96% lower).
The record links to 0 conditions, and to 2 interventions - of which NO exercise at depth is the first listed.
NCT01782625 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT01782625 about?
NCT01782625 is a clinical study titled "Hypercapnia: Cognitive Effects and Monitoring". The investigators will simulate the conditions of a working, helmeted diver by using exercising, "head out" immersed subjects to test the following hypotheses: 1. An algorithm can be developed which predicts cognitive performance in immersed exercising divers, based on the exhaled carbon dioxide (P...
What is the current status of trial NCT01782625?
This trial is currently completed. It is a NA study. The enrollment target is 58 participants. The study started on 2013-01. Estimated completion is 2016-02.
What interventions are being tested in trial NCT01782625?
The interventions under investigation include: NO exercise at depth (OTHER), exercise at depth (OTHER).
Who is sponsoring clinical trial NCT01782625?
This trial is sponsored by Duke University, which has 1,725 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT01782625's enrollment target sits among peer trials
58 1256th of 2000 higher than 740 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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