RadioisotopesIsotopesIsotope LabelingNitrogen IsotopesOxygen IsotopesCarbon IsotopesArgonAtmospheric PressureHigh Pressure Neurological SyndromeNoble GasesInert Gas NarcosisPlasma GasesAir PressureKryptonLung Volume MeasurementsZinc IsotopesPolyvinyl ChlorideSulfur IsotopesPneumoperitoneum, ArtificialGasesOxygenDeuteriumIndicator Dilution TechniquesNitrogenIron IsotopesNeonBiolisticsAir