SLEEP DEPRIVATION IS COMMON IN CRITICALLY ILL PATIENTS IN INTENSIVE CARE UNITS (ICU). SLEEP FOR ICU PATIENTS IS REPRESENTED BY FREQUENT DISRUPTIONS, LOSS OF CIRCADIAN RHYTHMS AND A PAUCITY OF TIME SPENT IN RESTORATIVE SLEEP STAGES. TYPICAL FINDINGS DESCRIBED BY POLYSOMNOGRAPHY (PSG), INCLUDE INCREASED LATENCY, A HIGHER PROPORTION OF NON-RAPID EYE MOVEMENT (NREM) SLEEP STAGE 1 AND 2 (OR LIGHT SLEEP), AND REDUCED RESTORATIVE SLOW WAVE (SW) AND RAPID EYE MOVEMENT (REM) SLEEP, LARGELY BECAUSE OF FREQUENT WAKING. THERE ARE MANY EXTRINSIC AND INTRINSIC FACTORS OF SLEEP DEPRIVATION IN THE ICU SETTING INCLUDING NOISE, LIGHT, NURSING PROCEDURES, THE PRESENCE OF EXISTING DISEASES, INFLAMMATORY MEDIATORS, ANXIETY, PAIN, SEDATIVE AND OPIOID MEDICATIONS AND MECHANICAL VENTILATOR SETTING.ICU SLEEP DEPRIVATION IS ASSOCIATED WITH DETRIMENTAL OUTCOMES, INCLUDING DELIRIUM, DIFFICULTY WEANING, INCREASED NOSOCOMIAL INFECTIONS, PROLONGED ICU LENGTH OF STAY AND INCREASED ICU MORTALITY.SLEEP GOALS FOR ICU PATIENTS ARE TO GET ENOUGH SLEEP, RESET THE DISORDERED CIRCADIAN RHYTHMS, ADJUST THE ABNORMAL SLEEP STRUCTURE, REDUCE SLEEP INTERRUPTION, OVERCOME FATIGUE AND ANXIETY, FACILITATE NURSING CARE AND TREAT DISEASE.