title: Pulmonary function in microgravity:  Spacelab 4 and beyond.
abstract: This paper refers principally to the composition gradient of gases within the lung in various conditions of gravity, as revealed by exhaled breath.  A rapid gas analyzer-based system has been developed for tests in Spacelab 4.  The test sequence and expected results are presented.
authors.affiliation: Department of Medicine, University of California-San Diego, La Jolla 92093.
authors.forename: H J
authors.initials: HJ
authors.lastname: Guy
authors.forename: G K
authors.initials: GK
authors.lastname: Prisk
authors.forename: J B
authors.initials: JB
authors.lastname: West
mesh_terms: D001944:Breath Tests / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D006801:Humans; D018471:Hypergravity; D008168:Lung / Q000502:physiology*; D008449:Maximal Expiratory Flow-Volume Curves / Q000502:physiology; D009584:Nitrogen / Q000032:analysis; D011187:Posture; D012119:Respiration / Q000502:physiology*; D012129:Respiratory Function Tests / Q000295:instrumentation / Q000379:methods; D013026:Space Flight; D014692:Ventilation-Perfusion Ratio / Q000502:physiology; D014893:Weightlessness
chemical_list: D009584:Nitrogen