Which term means freedom from bacteria and other microorganisms?

NPO means

a. nothing presently open. b. no physician's orders. c. not previously ordered. d. nothing by mouth.

Which of the following are trigger variables for the Puritan BennettTM 840 ventilator?

I. flow II. manual III. pressure IV. time A) I B) I and II C) I, II, and III D) I, II, III, and IV