The active ingredient in Robitussin is

The tip of a central venous catheter rests in the:

A. vena cava. B. left atrium. C. right ventricle. D. pulmonary vein.

Which of the following are disadvantages of using intermittent mandatory ventilation for wean-ing?

1. Potentially high work of breathing 2. Weaning time possibly prolonged 3. Patient-ventilator asynchrony 4. Higher mean airway pressures a. 1 and 3 only b. 1, 2, and 3 only c. 3 and 4 only d. 2, 3, and 4 only