Acidosis, RespiratoryAcidosisAlkalosis, RespiratoryHypercapniaAcidosis, LacticAcid-Base EquilibriumCarbon DioxideBicarbonatesSubmarine MedicineAlkalosisHydrogen-Ion ConcentrationAcidosis, Renal TubularBlood Gas AnalysisHypoventilationRespiratory InsufficiencyPartial PressureSodium-Bicarbonate SymportersRespiration, ArtificialOxygen Inhalation TherapyOxygenSodium-Hydrogen AntiporterLung Diseases, Obstructive