How high is the risk of choking (on food) while under anesthetics if you have gastroparesis and frequent acid reflux?

NPO: Patients are kept from eating or drinking before surgery for 6-12 hours whenever possible to prevent this--reflux of stomach acid can still occur. Reflux risk is often reduced with h2 blockers or proton pump inhibitors to reduce stomach acidity. In emergency cases, meds and endotracheal intubation do their best to prevent aspiration.

Aspiration: Aspiration of gastric contents is possible under anesthesia. However, by keeping the patient without food or drink for greater than 8 hours will minimize the risk. Premedication with intravenous drugs such as Metoclopramide is useful, as are medications which decrease stomach acid production. Also, a rapid induction technique for anesthesia with an endotracheal tube may be indicated.

Unlnown: The understanding of "nothing by mouth" times has changed in recent years. The length of time being far shorter. However a person with gastro paresis may potentially extend the nothing by mouth times considerably way past eight hours.