Illinois CNA State Practice Exam

The medical abbreviation NPO stands for "nothing by mouth". This is the standard medical abbreviation used to indicate that a patient should not eat or drink anything. Option B, no physical activity, is incorrect because the medical abbreviation for this is NPA, not NPO. Option C, no pain observed, is also incorrect because the medical abbreviation for this is N/P, not NPO. Option D, no patient outgoing, is also incorrect and is a made up answer.