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
調査の概要
詳細な説明
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.
研究の種類
入学 (実際)
段階
- 適用できない
連絡先と場所
研究場所
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Zurich、スイス、8091
- Respiratory Clinic, University Hospital of Zurich
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
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
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:防止
- 割り当て:ランダム化
- 介入モデル:クロスオーバー割り当て
- マスキング:独身
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
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実験的: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.
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高度シミュレーター(「Altitrainer」)による脱酸素化空気の吸入。 1時間。
フェイスマスクによって与えられます。
Inhalation of unmodified air through an altitude Simulator ("Altitrainer") for approximately 1 hour given by a facemask
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実験的: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.
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高度シミュレーター(「Altitrainer」)による脱酸素化空気の吸入。 1時間。
フェイスマスクによって与えられます。
Inhalation of unmodified air through an altitude Simulator ("Altitrainer") for approximately 1 hour given by a facemask
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この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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arterial blood oxygenation under simulated altitude at rest (FiO2: 15.1)
時間枠:2 hours
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Difference in arterial blood oxygenation under simulated altitude (FiO2: 15.1%) and shamed hypoxia (FiO2: 20.9%) at rest.
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2 hours
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arterial blood oxygenation under simulated altitude at the time of exhaustion (FiO2: 15.1)
時間枠:2 hours
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Difference in arterial blood oxygenation under simulated altitude (FiO2: 15.1%) and shamed hypoxia (FiO2: 20.9%) at the time of exhaustion
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2 hours
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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Near infrared spectroscopy under simulated altitude at rest (FiO2: 15.1)
時間枠:2 hours
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Difference in cerebral tissue oxygenation and muscle tissue oxygenation under simulated altitude (FiO2: 15.1%) and shamed hypoxia (FiO2: 20.9%) at rest
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2 hours
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Near infrared spectroscopy under simulated altitude at rest (FiO2: 15.1)
時間枠:2 hours
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Difference in cerebral tissue oxygenation and muscle tissue oxygenation under simulated altitude (FiO2: 15.1%) and shamed hypoxia (FiO2: 20.9%)
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2 hours
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協力者と研究者
スポンサー
研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
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