- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg NCT03637114
Acute Exposure of Simulated Hypoxia on Blood and Tissue Oxygenation (aBGA, NIRS)
Acute Exposure to Hypoxia in Precapillary Pulmonary Hypertension: Physiological and Clinical Effects at Rest and During Exercise
Studieoversigt
Status
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
Low altitude baseline measurements will be performed in Zurich (460m asl) including Echocardiography, Right heart catheterization, six-minute walk test (6MWT), pulmonary function test, clinical assessment and blood gas analysis.
Randomly assigned to the order of testing, the participants will be tested under simulated altitude (FiO2: 15.1% with the "AMC altitrainer") and shamed altitude with the same device.
At rest and under exercise data from ABGA and near infrared spectroscopy will be compared under simulated altitude and shamed altitude.
Undersøgelsestype
Tilmelding (Faktiske)
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
-
-
-
Zurich, Schweiz, 8091
- Respiratory Clinic, University Hospital of Zurich
-
-
Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Informed consent
- PH diagnosed according to internation Guidelines: mean pulmonary artery pressure (mPAP) ≥ 25 mmHg along with a pulmonary artery wedge pressure (PAWP) ≤15 mmHg during right heart catheterization at the time of initial diagnosis
- PH class 1 (PAH) or 4 (CTEPH)
- Stable condition, on the same medication for > 4 weeks
- Patient live permanently at an altitude < 1000m asl.
Exclusion Criteria:
- Resting partial Oxygen pressure (PaO2) ≤7.3 kilopascal (kPA) corresponding to the requirement of long-term oxygen therapy > 16hour daily (nocturnal oxygen therapy alone is allowed)
- Severe daytime hypercapnia (pCO2 > 6.5 kPa)
- Susceptibility to high altitude related diseases (AMS, high-altitude pulmonary edema (HAPE), etc.) based on previous experienced discomfort at altitudes.
- Exposure to an altitude >1500m for ≥3 nights during the last 4 weeks before the study participation
- Residence > 1000m above sea level
- Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders, neurological or orthopedic problems with walking disability
- Women who are pregnant or breast feeding
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Forebyggelse
- Tildeling: Randomiseret
- Interventionel model: Crossover opgave
- Maskning: Enkelt
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
|---|---|
|
Eksperimentel: Order air-hypoxia
The participants will be exposed to shamed hypoxia (FiO2: 20.9% equivalent to sea level and consecutively to simulated altitude (FiO2: 15.1% equivalent to 2500m above sea level) administered by an altitude Simulator ("Altitrainer, SMTEC"), simulated altitude (FiO2: 15.1%), with a facemask.
|
Indånding af iltfri luft gennem en højdesimulator ("Altitrainer"), i ca. 1 time.
givet af en ansigtsmaske.
Inhalation of unmodified air through an altitude Simulator ("Altitrainer") for approximately 1 hour given by a facemask
|
|
Eksperimentel: Order hypoxia-air
The participant will be exposed to hypoxia (FiO2, 15.1% equivalent to 2500m above sea level), simulated altitude (FiO2: 15.1%), and consecutively to shamed hypoxia (FiO2, 20.9%) administered by an altitude simulator ("Altitrainer, SMTEC") with a facemask.
|
Indånding af iltfri luft gennem en højdesimulator ("Altitrainer"), i ca. 1 time.
givet af en ansigtsmaske.
Inhalation of unmodified air through an altitude Simulator ("Altitrainer") for approximately 1 hour given by a facemask
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
arterial blood oxygenation under simulated altitude at rest (FiO2: 15.1)
Tidsramme: 2 hours
|
Difference in arterial blood oxygenation under simulated altitude (FiO2: 15.1%) and shamed hypoxia (FiO2: 20.9%) at rest.
|
2 hours
|
|
arterial blood oxygenation under simulated altitude at the time of exhaustion (FiO2: 15.1)
Tidsramme: 2 hours
|
Difference in arterial blood oxygenation under simulated altitude (FiO2: 15.1%) and shamed hypoxia (FiO2: 20.9%) at the time of exhaustion
|
2 hours
|
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Near infrared spectroscopy under simulated altitude at rest (FiO2: 15.1)
Tidsramme: 2 hours
|
Difference in cerebral tissue oxygenation and muscle tissue oxygenation under simulated altitude (FiO2: 15.1%) and shamed hypoxia (FiO2: 20.9%) at rest
|
2 hours
|
|
Near infrared spectroscopy under simulated altitude at rest (FiO2: 15.1)
Tidsramme: 2 hours
|
Difference in cerebral tissue oxygenation and muscle tissue oxygenation under simulated altitude (FiO2: 15.1%) and shamed hypoxia (FiO2: 20.9%)
|
2 hours
|
Samarbejdspartnere og efterforskere
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- 2018-00455_A3
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