The planned Investigation Unit (PIU) caters for patients who are undergoing planned investigations or treatments. The PIU is not an in-patient area, and caters for patients on a day-case basis. These investigations or treatments include : Gastroenterology Cardiology Rheumatology Respiratory Endocrinology Radiological procedures that require a period of recovery. On occasion the unit also cares for patients from other specialities. Accessibility & Travel Information Click here for accessibility information and directions for visiting the Planned Investigation Unit. This page also includes printable guides for your convenience.