The key differences between various types of physician specialists and nonphysician providers.

There are four main types of anesthesia, and the type administered depends on many factors such as the extent of the procedure and the patient’s current health.

Here are answers to 10 frequently asked questions about anesthesia for those of us — myself included — who no longer need to worry about being asked for ID if we order a drink.

Before being given any kind of anesthesia, give a complete medical history to doctors and nurses and ask questions about your care.