An 18-year-old with severe asthma is brought into the emergency department on an nonrebreathing mask; he is in acute respiratory distress. He has been given multiple rounds of bronchodilators and corticosteroids and is still in distress, with an SpO2 of 85% on the nonrebreathing mask. What therapy should the respiratory care practitioner suggest to the physician at this time?

Which is the correct order of steps to perform the modified Allen’s test?I. Pressure is applied to both the radial and ulnar arteries.II. The fist is opened, but not fully extended.III. Pressure on the ulnar artery is removed.IV. The hand is clenched into a tight fist.V. The palm and fingers are blanched.

A patient who requires mechanical ventilation has a core body temperature of 32o C; humidity is being provided with a heat moisture exchanger. Which of the following statements is accurate?

Which safety system is used with small cylinders, sizes “A” through “E”?

A cylinder has “DOT 3AL 2015” stamped on it. What does the 3AL stand for?

Which of the following are the potential harmful effects of excessive amounts of oxygen therapy?1. Persistent pulmonary hypertension2. Oxygen-induced hypoventilation3. Absorption atelectasis4. Retinopathy or prematurity

What is one major component of a pneumatically powered percussor?

A large humidity deficit will cause:

Pressure-compensated flowmeters provide which of the following?

A pulse oximeter on a patient with a tracheostomy shows 89% saturation. The patient has a heated humidifier with a 40% air-entrainment tracheostomy collar. A rapid assessment shows no secretion production and equal breath sounds. Which of the following is the most appropriate first step?