How long does an ambulatory monitor typically record an ECG?

Which of the following is a test of hearing sensitivity?

a. Acoustical radiogram test b. Acoustic reflex latency test c. Audio refractive potential test d. Auditory brainwave test

_______________ is a technique that uses a small catheter to provide a continuous or phasic gas flow directly into the endotracheal tube during mechanical ventilation.

Fill in the blank(s) with the appropriate word(s).