Hjerne under indsats: virkninger af hypoxi hos respiratoriske patienter (NEUROX)
Hjernens iltning bestemmes af produktet af CaO2 og den cerebrale blodgennemstrømning (CBF), ændringen af den ene eller den anden kan påvirke den neuronale O2 tilgængelighed.
Udover effekten af PaO2 er CBF også reguleret af PaCO2. Under anstrengelse i en tilstand af hypoxi kan faldet i PaO2 forbundet med et potentielt fald i PaCO2 og derfor af CBF skabe en vigtig svimmelhed mellem efterspørgslen og udbuddet af cerebral O2.
Det ser ud til, at hypoxi på en betydelig måde kan forstyrre reaktionen fra centrale neuroner, ligesom produktionen af en motorisk cortex genererede motoriske kommandoer.
Undersøgelser tyder på, at træning i svær hypoxitilstand kan udgøre en nødvendig trussel for hjernens iltning og den motoriske kommando med den konsekvens et fald i træningspræstationen.
Dette projekt har til formål at undersøge virkningerne af hypoxi på hjernefunktionen hos patienter, der lider af kronisk luftvejssygdom. Neurofysiologiske reaktioner i hjernen under hvile eller motion, herunder drop og cerebral iltning, kortikal excitation og motoriske kommandoer, der resulterer for hypoksiske forsøgspersoner før og efter en behandling for at korrigere abnormiteter af gaz i blodet.
Undersøgelsen vil bruge en multidisciplinær og supplerende metodologisk tilgang: den nær-infrarøde spektroskopi (NIRS) for at værdsætte drop og cerebral oxygenering, CBF, neurostimuleringsprocedurer og elektromyografi (EMG) for at værdsætte den kortikale excitabilitet, måle niveauet af central aktivering og motorisk kommando.
Målene for denne undersøgelse vil være:
- Mål drop og cerebral iltning, cortical excitabilitet, mekanismer for frivillig aktivering og central træthed til indsatsen for den kroniske hypoxæmipatient sammenlignet med raske kontrolpersoner.
- Analysere forstyrrelser af bevægelsesparametre og posturografic, i enkle og dobbelte opgaver, der involverer forskellige niveauer af cerebral opgave.
- Analyser akutte effekter af en forbedring af arteriel iltning for patienter, der lider af kronisk obstruktiv lungesygdom (KOL) på drop og cerebral iltning, kortikal excitabilitet, mekanismer for frivillig aktivering og central træthed.
- Evaluer virkningerne af en behandling med kontinuerligt positivt luftvejstryk (CPAP) for patienter, der lider af obstruktiv søvnapnø (OSA) med de samme parametre.
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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-
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La Tronche, Frankrig, 38700
- UniversityHospitalGrenoble
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inklusionskriterier:
KOL-patienter
- stadier GOLD III - IV, FEV1/FVC-forhold < 0,7 og maksimal frivillig ventilation (MVV) < 50 % af forudsagte værdier
- BMI < 30 kg/m²
- Alder mellem 18 og 80 år
- Ikke-ryger eller tidligere ryger (stop siden mere end 3 måneder)
- Stabil stand siden mere end 3 måneder
- PaCO2 < 45 mmHg hviler med omgivende luft
- Ingen OSA-diagnostik
OSA patienter
- Alvorlig OSA for nylig opdaget (apnø-hypopnøindeks (AHI) > 30)
- Score på Epworth Sleepiness Scale (ESS) > 10
- Alder mellem 18 og 80 år
- BMI < 30 kg/m²
Kontrolfag
- Alder mellem 18 og 80 år
- BMI < 30 kg/m²
- Ikke ryger
- Uden nogen kronisk respiratorisk patologi, kardiovaskulær, metabolisk, nyre- eller neuromuskulær, vestibulær og/eller synsforstyrrelse
Ekskluderingskriterier:
OSA- og KOL-patienter
- Patologier kardiovaskulære, neuromuskulære, metaboliske, renale
- Alkoholisme
- BMI > 30 kg/m²
- Psykiatriske lidelser eller historie med adfærdsforstyrrelser, synsforstyrrelser, vestibulære lidelser, neurologisk sygdom, der er følsom til at forstyrre postural kontrol og gang, kognitive forstyrrelser
- Ustabilitet siden mindre end 3 måneder
- Modargument til anvendelse af et eksternt magnetfelt
Kontrolfag
- Respiratoriske patologier, kardiovaskulære, neuromuskulære, metaboliske, renale
- Alkoholisme
- BMI > 30 kg/m²
- Psykiatriske lidelser eller historie med adfærdsforstyrrelser
- Modargument til anvendelse af et eksternt magnetfelt
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: BASIC_SCIENCE
- Tildeling: TILFÆLDIGT
- Interventionel model: PARALLEL
- Maskning: INGEN
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
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ACTIVE_COMPARATOR: Kronisk obstruktiv lungesygdom (KOL)
18 patienter
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Ved 80% af den maksimale aerobe kraft, indtil udmattelse
Indtil udmattelse
|
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ACTIVE_COMPARATOR: Søvnapnø obstruktiv (OSA)
18 patienter
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Ved 80% af den maksimale aerobe kraft, indtil udmattelse
Indtil udmattelse
|
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ACTIVE_COMPARATOR: Sunde frivillige
36 kontrolpatienter
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Ved 80% af den maksimale aerobe kraft, indtil udmattelse
Indtil udmattelse
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Nær-infrarød spektroskopi (NIRS)
Tidsramme: En halv time
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Mængder af total desoxyhæmoglobin og hæmoglobin på muskulære og cerebrale niveauer under hvile eller under anstrengelse som reaktion på inhalation af variable fraktioner af O2 og CO2.
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En halv time
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Patrick Levy, Professor, Grenoble Hospital University
Publikationer og nyttige links
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Datoer for undersøgelser
Studer store datoer
Studiestart (FAKTISKE)
Studiestart
Primær færdiggørelse (FAKTISKE)
Primær færdiggørelse
Studieafslutning (FAKTISKE)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (SKØN)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (FAKTISKE)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- 38RC12.212
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