Which of the following laboratory test results are affected most if the patient is NOT fasting?

A patient who looks at you when you walk into the scene of an EMS call, but will NOT respond to you when you speak and responds aggressively when you touch them, has an assessed mental status of:

A) V. B) A. C) P. D) U.

A cooperative and alert postoperative patient who is able to eat requires a continuous but low FiO2. Precise FiO2 concentrations are not needed. Which of the following devices would best achieve this end?

a. Simple O2 mask b. Air-entrainment mask c. Nasal cannula d. Nonrebreathing mask