While ventilating an adult with an HFOV, the therapist would like to increase the mean airway pressure in an attempt to improve the patient's Pao2. What should the therapist do to increase the mean airway pressure in this situation? I. decrease the respiratory rate II. decrease the bias flow III. increase the inspiratory time IV. decrease the orifice of the outflow resistor
A. I, II only
B. III, IV only
C. I, II, IV only
D. II, III, IV only
ANS: B
A. Incorrect response: See explanation B.
B. Correct response: To change the mean airway pressure during the delivery of HFOV, the therapist can (1) increase the bias flow, (2) alter the setting on the outflow resistor, and (3) increase the inspiratory time.
C. Incorrect response: See explanation B.
D. Incorrect response: See explanation B.
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