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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT04791488
Other study ID # 2019PBMD05
Secondary ID
Status Recruiting
Phase N/A
First received
Last updated
Start date March 30, 2022
Est. completion date March 30, 2028

Study information

Verified date April 2023
Source Direction Centrale du Service de Santé des Armées
Contact Nicolas VALLEE, PhD
Phone 483162849
Email nicolas.vallee@intradef.gouv.fr
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

The impact of oxygen therapy in many pathologies has been subject of recent work, arguing both favourable and harmful effects. Consequently, one can wonder about the influence of hyperoxic gas mixture during diving on the genesis of decompression sickness, but also about the systematic application of normobaric and hyperbaric oxygen in case of proven decompression sickness. In mammals, normoxic concentrations have been redefined at 20-100 mbars at the extracellular level and below 10 mbars in the mitochondria. Under hyperbaric conditions, most of the oxygen being dissolved in blood plasma, a state of hyperoxia is established which escapes the usual delivery and regulation system represented by red blood cells. The results of our team's previous work suggest a specific effect of diving on the levels of circulating mitochondrial DNA (mtDNA), suggesting cellular destruction linked to hyperoxia/hyperbaria. In fact, our studies, carried out on both animals and human divers, have shown that diving accident leads to an increase in mtDNA levels and an immune reaction through the mobilisation of leukocytes. The main objective of this study is to compare the influence of oxygen partial pressure levels on the evolution of clinical and biological variables during hyperbaric oxygen therapy sessions in healthy versus injured divers.


Recruitment information / eligibility

Status Recruiting
Enrollment 265
Est. completion date March 30, 2028
Est. primary completion date March 30, 2028
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 18 Years and older
Eligibility Inclusion Criteria: - Healthy subject with no contraindications to diving OR patient admitted to the hospital for suspicion of a diving accident OR patient admitted to the hospital for hyperbaric oxygen therapy Exclusion Criteria: - Contraindication to diving or contraindication to hyperbaric oxygen therapy

Study Design


Related Conditions & MeSH terms


Intervention

Procedure:
Hyperbaric oxygen therapy
Hyperbaric oxygen therapy protocol
Diving simulation
Hyperbaric chamber diving simulation protocol

Locations

Country Name City State
France Hôpital d'Instruction des Armées Sainte-Anne Toulon

Sponsors (1)

Lead Sponsor Collaborator
Direction Centrale du Service de Santé des Armées

Country where clinical trial is conducted

France, 

Outcome

Type Measure Description Time frame Safety issue
Primary Evolution of decompression sickness clinical symptoms Decompression sickness clinical symptoms will be assessed through a medical examination after each hyperbaric session.
Decompression sickness clinical symptoms include: paresthesia, sensory deficit, motor deficit, spinal pain, sphincter disorder and brain injury.
The evolution of symptoms will be rated as following: total regression, improvement, stabilization, fluctuation or worsening
Until the end of the oxygen therapy treatment (up to 1 year)
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