- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT07585227
Study of the Effects of Acute Exposure to Moderate Altitude Hypoxia on Prospective Memory. (HYPRO)
Etude Des Effets d'Une Exposition aiguë à l'Hypoxie d'Altitude modérée Sur la mémoire Prospective (HYPRO)
The goal of this study is to investigate whether prospective memory, i.e., memory for delayed intentions, is impaired at moderate altitude (4,000m).
It will also allow to study the effect of air and oxygen administration during hypoxia exposure.
The main questions it aims to answer are:
- Does moderate acute hypoxia impair prospective memory ?
- If so, does air or oxygen adminsitration induce a restoration of prospective memory? Researchers will compare cognitive performance during normobaric hypoxia exposure to cognitive performance during normoxia (control situation).
Participants will:
- Session S0. Perform a battery of neuropsychological tests and questionnaires). EEG will be recorded during tests. A cheek swab will be performed.
- Sessions S1 and S2. Perform several cognitive tasks while exposed to hypoxia and to normoxia (2 different sessions, randomized order) in a normobaric chamber. These are standardized cognitive tests administered on a computer and cognitive tests embedded in a flight simulator scenario. Various questionnaires will be performed on a regular basis. Several physiological measurements will be performed continuously: EEG, ECG, SpO2 and breathing rate. Blood pressure will be measured at the beginning and at the end of hypoxia/normoxia exposure. A blood sample will also be performed. At last, participants will inhale air or oxygen through a mask while making a cognitive task in the chamber.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Flight crew operate in a dynamic, complex, and uncertain environment that requires them to process a large amount of information from multiple sources under time pressure. To successfully carry out their mission, flight crews must therefore constantly sort, prioritize, and analyze relevant information based on the situation, which requires them to manage their cognitive resources simultaneously-at the risk of experiencing a decline in performance that could significantly compromise aviation safety.
With recent changes in the geostrategic context, the flight profiles of operational missions expose military aircraft crews and onboard operators to a greater risk of in-flight hypoxia. During an acute hypoxic episode, physiological cardiac and respiratory responses are triggered to protect the body-and particularly the brain-from oxygen deprivation. However, these mechanisms are effective only for a limited time. If normoxia is not restored, symptoms will manifest as hypoxemia worsens.
Among flight crew members, impairments in cognitive functions-particularly prospective memory-such as failing to report one's position to other aircraft or failing to retract the flaps before takeoff, are common and can lead to serious accidents. To our knowledge, the effects of hypoxic exposure on this form of memory have not yet been investigated.
Type d'étude
Inscription (Estimé)
Phase
- N'est pas applicable
Contacts et emplacements
Coordonnées de l'étude
- Nom: Carine MALLE, PhD
- Numéro de téléphone: 33 178651479
- E-mail: carine.malle@gmail.com
Sauvegarde des contacts de l'étude
- Nom: Fabien SAUVET, MD, PhD
- E-mail: fabien.sauvet@gmail.com
Lieux d'étude
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Brétigny-sur-Orge, France, 91220
- Institut de Recherche Biomédicale des Armées
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Contact:
- Fabien SAUVET, MD, PhD
- E-mail: fabien.sauvet@gmail.com
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Contact:
- Carine MALLE, Phd
- E-mail: carine.malle@gmail.com
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-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
- Adulte
Accepte les volontaires sains
La description
Inclusion Criteria:
- Healthy volunteer
- Has provided informed consent
Exclusion Criteria:
- Individuals who do not understand French
- Pregnant or breastfeeding women
- Cardiovascular risk factor
- Infectious disease within the last 4 weeks
- Chronic cardiovascular, respiratory, hematological, neurological, psychiatric, or metabolic disease
- History of epileptic seizures, convulsions, or loss of consciousness
- Individuals with migraines
- History of a bleeding disorder
- History of high blood pressure
- Current medication use (excluding contraception)
- History of episodes of altitude intolerance
- Stay at high altitude (> 3,500 m) within the last 3 months
- Anxiety score on the Hospital Anxiety and Depression (HAD) scale > 7
- Depression score on the HAD scale > 7
- Uncontrollable claustrophobia or a history of panic attacks
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Autre
- Répartition: Randomisé
- Modèle interventionnel: Affectation croisée
- Masquage: Double
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Expérimental: Normoxia-Air + Hypoxia-Air
S1 = Normoxia exposure + air administration S2 = Hypoxia exposure + air administration
|
Normobaric hypoxia exposure (FiO2 = 12,6%, equivalent to 4,000m) during 4h
Air administration (Fi02 = 21%) through a mask during 10 minutes
Auditory oddball, visual oddball, event-based prospective memory, time-based prospective memory, n-back.
EEG, ECG, SpO2, breathing rate, eyetracking, blood pressure
A blood sample is collected for mitochondrial breathing analyses
Event-based prospective memory and time-based prospective memory.
Prepar3D flight simulator.
|
|
Expérimental: Hypoxia-Air + Normoxia-Air
S1 = Hypoxia exposure + air administration S2 = Normoxia exposure + air administration
|
Normobaric hypoxia exposure (FiO2 = 12,6%, equivalent to 4,000m) during 4h
Air administration (Fi02 = 21%) through a mask during 10 minutes
Auditory oddball, visual oddball, event-based prospective memory, time-based prospective memory, n-back.
EEG, ECG, SpO2, breathing rate, eyetracking, blood pressure
A blood sample is collected for mitochondrial breathing analyses
Event-based prospective memory and time-based prospective memory.
Prepar3D flight simulator.
|
|
Expérimental: Normoxia-O2 + Hypoxia-O2
S1 = Normoxia exposure + oxygen administration S2 = Hypoxia exposure + oxygen administration
|
Normobaric hypoxia exposure (FiO2 = 12,6%, equivalent to 4,000m) during 4h
Auditory oddball, visual oddball, event-based prospective memory, time-based prospective memory, n-back.
EEG, ECG, SpO2, breathing rate, eyetracking, blood pressure
A blood sample is collected for mitochondrial breathing analyses
Event-based prospective memory and time-based prospective memory.
Prepar3D flight simulator.
Oxygen administration (FiO2 = 100%) through a mask during 10 minutes
|
|
Expérimental: Hypoxia-O2 + Normoxia-O2
S1 = Hypoxia exposure + oxygen administration S2 = Normoxia exposure + oxygen administration
|
Normobaric hypoxia exposure (FiO2 = 12,6%, equivalent to 4,000m) during 4h
Auditory oddball, visual oddball, event-based prospective memory, time-based prospective memory, n-back.
EEG, ECG, SpO2, breathing rate, eyetracking, blood pressure
A blood sample is collected for mitochondrial breathing analyses
Event-based prospective memory and time-based prospective memory.
Prepar3D flight simulator.
Oxygen administration (FiO2 = 100%) through a mask during 10 minutes
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Change in event-based prospective memory accuracy between hypoxia and normoxia conditions
Délai: Through study completion, an average of 1 month
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Accuracy (%) = Prospective memory target detection rate (number of targets correctly responded to / total number of targets presented × 100)
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Through study completion, an average of 1 month
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Collaborateurs et enquêteurs
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Estimé)
Achèvement primaire (Estimé)
Achèvement de l'étude (Estimé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
- Maladies du cerveau
- Maladies du système nerveux central
- Maladies du système nerveux
- Maladies des voies respiratoires
- Troubles respiratoires
- Signes et symptômes respiratoires
- Conditions pathologiques, signes et symptômes
- Signes et symptômes
- Hypoxie
- Hypoxie, Cerveau
- Maladie de l'altitude
- Techniques d'investigation
- Manipulation des échantillons
- Techniques de laboratoire clinique
- Techniques et procédures de diagnostic
- Diagnostic
- Perforation
- Procédures chirurgicales, opératoires
- Produits chimiques inorganiques
- Éléments
- Chalcogènes
- Gaz
- Oxygène
- Collection d'échantillons de sang
Autres numéros d'identification d'étude
- 2026-A00082-49 (Autre identifiant: ANSM)
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
Informations sur les médicaments et les dispositifs, documents d'étude
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