Nil per os, Latin for “nothing by mouth”
Nothing per mouth or NPO refers to the direction of having nothing to eat or drink during a time period before surgery. Usually begins midnight the day before.
Medication used for local or regional anesthesia; can be injected or applied topically.
An anesthesia provider that completed a training program. Anesthesia Asistants are required to work under the direction of an anesthesiologist and can only practice in certain states.