South Dakota respiratory failure expert witnesses bring clinical insight into hypoxemic and hypercapnic respiratory crises, ventilator management, and ICU standards of care. Many are pulmonologists, critical care physicians, respiratory therapists, and emergency clinicians with experience in Sanford Health and Avera systems serving rural transfers. They evaluate ARDS, COPD exacerbations, aspiration, sepsis-related failure, and oxygenation monitoring decisions.