Intensive treatment units (ITU) are specially designed hospital units that provide the highest level of care for critically ill patients, such as those requiring ventilator support or intensive monitoring. Synonyms for ITU include intensive care unit (ICU), critical care unit (CCU), high dependency unit (HDU), and acute care unit (ACU). These units are staffed by specialized healthcare professionals such as critical care nurses, physicians, respiratory therapists, and pharmacists, who work collaboratively to provide life-saving interventions and support to patients and families during times of medical crisis. These synonyms reflect the critical role that these units play in the provision of acute healthcare, where timely and effective treatment can mean the difference between life and death.