- ICH GCP
- Registro de ensaios clínicos dos EUA
- Ensaio Clínico 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.
Visão geral do estudo
Status
Condições
Intervenção / Tratamento
Descrição detalhada
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.
Tipo de estudo
Inscrição (Estimado)
Estágio
- Não aplicável
Contactos e Locais
Contato de estudo
- Nome: Carine MALLE, PhD
- Número de telefone: 33 178651479
- E-mail: carine.malle@gmail.com
Estude backup de contato
- Nome: Fabien SAUVET, MD, PhD
- E-mail: fabien.sauvet@gmail.com
Locais de estudo
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Brétigny-sur-Orge, França, 91220
- Institut de Recherche Biomédicale des Armées
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Contato:
- Fabien SAUVET, MD, PhD
- E-mail: fabien.sauvet@gmail.com
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Contato:
- Carine MALLE, Phd
- E-mail: carine.malle@gmail.com
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto
Aceita Voluntários Saudáveis
Descrição
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
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Outro
- Alocação: Randomizado
- Modelo Intervencional: Atribuição cruzada
- Mascaramento: Dobro
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
|
Experimental: 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.
|
|
Experimental: 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.
|
|
Experimental: 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
|
|
Experimental: 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
|
O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Change in event-based prospective memory accuracy between hypoxia and normoxia conditions
Prazo: 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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Colaboradores e Investigadores
Patrocinador
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Estimado)
Conclusão Primária (Estimado)
Conclusão do estudo (Estimado)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Real)
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
- Doenças Cerebrais
- Doenças do Sistema Nervoso Central
- Doenças do Sistema Nervoso
- Doenças Respiratórias
- Distúrbios Respiratórios
- Sinais e Sintomas Respiratórios
- Condições Patológicas, Sinais e Sintomas
- Sinais e sintomas
- Hipóxia
- Hipóxia, Cérebro
- Mal de altitude
- Técnicas de investigação
- Manipulação de amostras
- Técnicas de laboratório clínico
- Técnicas e procedimentos de diagnóstico
- Diagnóstico
- Perfurações
- Procedimentos cirúrgicos, operatórios
- Produtos químicos inorgânicos
- Elementos
- Chalcogênios
- Gases
- Oxigênio
- Coleção de amostras de sangue
Outros números de identificação do estudo
- 2026-A00082-49 (Outro identificador: ANSM)
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
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