No abstract available
MeSH terms
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Acidosis, Respiratory / drug therapy
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Administration, Inhalation
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Helium / administration & dosage
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Helium / therapeutic use*
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Humans
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Hypercapnia / drug therapy
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Hypoventilation / drug therapy*
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Hypoxia / drug therapy
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Lung Diseases, Obstructive / drug therapy*
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Male
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Middle Aged
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Oxygen / administration & dosage
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Oxygen / therapeutic use*
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Oxygen Inhalation Therapy
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Respiratory System Agents / administration & dosage
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Respiratory System Agents / therapeutic use*
Substances
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Respiratory System Agents
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Helium
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heliox
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Oxygen