As a general surgical intensive care units of the biggest tertiary referral university of Thailand with more than 1,000 admissions/year, recently, more complicated perioperative care surgical patients were accepted with high complications, morbidities, mortality and resource utilization. Good data registration was needed to provide information for quality improvement and resource allocation. This prospective observational (crosssectional) study was designed to register patient \> 18 years who will be admitted to these ICUs to explore the adequacy of these ICUs services, resource utilization (ICU length of stay and ventilator day), ICU complications, adverse outcome /ICU readmission within 72 hours after discharging from ICU. In addition, severe hemodynamic, respiratory, or neurological disturbance or complication intra and early postoperative (within 7 days after operation) that lead to ICU admission eg, intraoperative hypotension, intraoperative cardiac arrest, perioperative pulmonary aspirtaion will also be studied.