What percentage of total face-to-face time must be exceeded during the encounter to make time the controlling factor to qualify for a particular level of E/M service?

The advantage of two-rescuer CPR over one-rescuer CPR is that:

A) more oxygen is provided to the patient. B) the job is shared between the two rescuers, thus reducing rescuer fatigue. C) chest compressions will not be interrupted for as long. D) the compression rate allows for better filling of the heart.

The statement "The baseline pressure is elevated but is periodically released to a lower level for a very brief period, and the patient is allowed to breathe spontaneously at each level" describes which of the following ventilator modes?

a. Bilevel positive airway pressure b. Pressure-controlled inverse-ratio ventila-tion c. Airway pressure-release ventilation d. Mandatory minute ventilation