When performing tracheobronchial suctioning, what should be the maximum amount of suction time?

In order to perform the physical examination, the physician must do which of the following?

a. Obtain the patient's verbal permission before beginning the physical examination. b. Perform the examination according to the order of the 1997 single organ–system physical examination evidentiary checklist. c. Be sure to use the appropriate tools such as an otoscope and an ophthalmoscope. d. Physically interact with the patient, such as by touching or palpating, listening to or auscultation, looking at or inspecting different parts of the patient's body.

The end point of a helium dilution test occurs when:

a. nitrogen is washed out. b. there is no more helium. c. the change in pressure remains steady. d. the helium percentage remains steady for 2 minutes.