ICU stands for Intensive Care Unit, it is a specialized department in a hospital that provides highly specialized care for critically ill patients. In a hospital for chest diseases, the ICU may provide specialized care for patients with severe respiratory conditions, such as pneumonia, chronic obstructive pulmonary disease (COPD), and acute respiratory distress syndrome (ARDS), among others. The ICU team typically includes critical care specialists, nurses, respiratory therapists, and other healthcare professionals who work together to provide the highest level of care for these patients.