TMC Exam with Questions and Verified Solutions

TMC Exam with Questions and Verified Solutions The medication prostacyclin is used for which of the following purposes? A. decrease pulmonary hypertension B. bronchodilate large airways C. decrease systemic vascular resistance (SVR) D. improve cardiac contractility ANSWER A. decrease pulmonary hypertension The respiratory therapist obtains the following blood gas data on a patient breathing spontaneously on room air: pH 7.35 PaCO2 45 torr PaO2 50 torr HCO3- 27 mEq/L BE +2 mEq/L The therapist could accurately estimate the patient's SaO2 to be which of the following? A. 75% B. 80% C. 85% D. 90% ANSWER B. 80% A PaO2 of 50 mmHg most closely correlates with an oxygen saturation of about 80% on the oxygen dissociation curve. After instructing a patient and demonstrating the proper use of a metered dose inhaler with a valved holding chamber, the patient performs the maneuver by placing the chamber in his mouth, actuating the cannister, and then exhaling prior to performing inhalation. The respiratory therapist should