Which of the following medications prevents coagulation by antagonizing the effects of vitamin K?

Which of the following statements concerning the Newport HT50 ventilator is true?

a. It requires both an oxygen and an air source to operate properly. b. It can be used to ventilate patients who weigh more than 5 kg. c. The internal battery can sustain ventilator operation for 10 hours. d. The "battery empty" message is activated when there are less than 15 minutes left.

Which of the following interfaces is (are) used in the application of noninvasive positive pressure ventilation?

1. Nasal mask 2. Nasal pillow 3. Oronasal mask 4. Total face mask a. 1 only c. 1, 2, and 4 b. 1 and 3 d. 1, 2, 3, and 4