An intensive treatment unit (ITU) is a term used to describe a specialized medical facility that provides critical care services to seriously ill patients. However, ITU is not the only term used in the medical field to describe such a facility. Alternate synonyms include intensive care unit (ICU), critical care unit (CCU), and high-dependency unit (HDU). Each term refers to the same type of medical facility that provides specialized medical care to patients with life-threatening illnesses or injuries. While different hospitals may prefer one term over the other, the goal of these facilities remains the same: to provide the highest level of medical care and attention possible to critically ill patients.