Respiratory InsufficiencyChronic DiseaseNeuromuscular DiseasesLung Diseases, ObstructiveDoxapramBulbar Palsy, ProgressiveHypercapniaAdrenal InsufficiencyTracheostomyRespiration, ArtificialIntermittent Positive-Pressure VentilationPhrenic NerveFatal OutcomePartial PressureBlood Gas AnalysisRenal InsufficiencyVenous InsufficiencyOxygen Inhalation TherapyPositive-Pressure RespirationQuadriplegiaExocrine Pancreatic InsufficiencyDiaphragmLung DiseasesPlacental InsufficiencyOxygenRespirationRespiratory Function TestsInfant, NewbornAnoxiaCarbon Dioxide