Deep dive danger? study reveals lung changes after extreme scuba
NCT ID NCT05775562
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at how deep dives (60-120 meters) using closed-circuit rebreathers affect divers' lungs. Twenty experienced divers had lung tests, ultrasounds, and blood samples before, right after, and the day after a dive. The goal was to measure changes in lung capacity and understand why divers may feel short of breath after deep dives.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this study could help improve safety guidelines and medical checks for deep recreational divers.
- What could go wrong
- This is a small, early observational study with only 20 divers. It measures temporary changes, not long-term health effects, and may not apply to all divers.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
-
20 people
The number who actually took part.
- Started
-
Sep 2023
- Finished
-
Sep 2024
- Lead sponsor
-
Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
18 years and older
- Sex
-
Anyone
- Healthy volunteers
-
Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Diver ≥ 18 years old * Recreational rebreather diver with a recognised qualification (Mixed Gas CCR training or equivalent) and the necessary experience for this type of diving who has scheduled a dive in the 60 metre depth zone * Diver using his/her own equipment, i.e. a closed circuit rebreather with back lungs meeting CE standards. * Having a medical certificate of no contraindication to the practice of underwater activities \< 1 year issued by an authorised doctor * Having taken out personal insurance covering this type of activity * Voluntary and having given his/her express, free and informed consent * Affiliated to the Social Security Exclusion Criteria: * Diver refusal * Known previous respiratory pathology * Use of medication that may alter pulmonary and/or vascular function as well as inflammatory and haemostasis parameters * Any temporary contraindication to the practice of scuba diving * Patient under guardianship or trusteeship * Immersion beyond 30 metres within 7 days or any scuba diving within the previous 48 hours.
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for Physiopathology are added.
Genom att skicka in godkänner du våra Användarvillkor
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
CHU de BREST
Brest, 29200, France
More trials for these conditions
Other studies related to the condition(s) this trial covers.