Anesthesia providers have spent a great deal of time investigating this problem and have found ways of preventing this. One of the first things we learned is that certain risk factors increase the likelihood you will get this exist such as use of narcotics during surgery, female gender, non-smoker, history of motion sickness and a history of PONV. The longer the case lasts, the greater are the chances of having PONV. The type of surgery makes a difference. The surgeries with the greatest risk are intra-abdominal, laparoscopic surgery and ENT surgery.