ESSENTIAL FUNCTIONS: Performs inhaled medication therapy, arterial puncture, blood gas analysis, pulmonary function testing, chest physiotherapy, oxygen therapy, helium-oxygen therapy, carbon dioxide-oxygen therapy, nitric oxide-oxygen therapy, CPAP therapy, BIPAP therapy, bland aerosol therapy, PEP therapy, high-frequency oscillator therapy, and ventilatory support modalities as ordered by physician. Interprets diagnostic results for feasibility and reports results, to include blood or other body fluid analysis by blood gas analyzer and co-oximeter, pulmonary function screening, pulmonary mechanics studies, end-tidal C02, and pulse oximetry.