This page has instructions for patients who are having balance testing, surgery, or a home sleep test. Just click on the links in the table below to download this information. The ENG Instructions guide you in preparing for our balance tests. The other instructions will help those patients scheduled for surgery to understand what to expect both before and after surgery. In the education column, the Medical Records Release Authorization form is if you need a copy of your medical record sent to you or to another physician. You may also find some of the educational articles helpful, especially regarding hearing aids, hearing aid substitutes, and noise cancellation technologies for helping you sleep.