PPOs were created by ____ in response to HMOs' growing market share

Which of the following devices are output control valves used to regulate the flow of gas to the patient? I. rack and pinion poppet valves II. proportional valves III. electromagnetic poppet valves IV. pneumatic poppet valves

A. I, II only B. III, IV only C. I, II, III only D. II, III, IV only

Which of the following is the correct interpretation of the following arterial blood gas results taken from a patient receiving no supplemental oxygen: pH = 7.37; PaCO2 = 55 mm Hg; PaO2 = 53 mm Hg; SaO2 = 88%; and HCO3– = 31 mEq/L?

a. Compensated metabolic alkalosis with mild hypoxemia b. Compensated respiratory acidosis with moderate hypoxemia c. Partially compensated respiratory acidosis with mild hypoxemia d. Partially compensated respiratory acidosis with severe hypoxemia