Most researchers associate CCI with the need for prolonged acute mechanical ventilation or the opening of tracheostomy for prolonged acute mechanical ventilation. There is no single condition that does not require an extended mechanical ventilation from CCI. In conclusion, CCI is characterized by long-term care requiring survival and it is predicted that the cost of these patients will increase with the new patients whose cost will be added in the coming years. In the United States, the number of CCI is around 250,000, and this figure has increased by 50-100% in the last 10 years. At least 50% of these patients die in one year and less than 12% recover and become discharged. The annual cost of these patients' health care system is over $ 20 billion. The prevalence of CCI in Turkey is still unknown. In this study, it was aimed to investigate the prevalence of patients with Chronic Critical Syndrome in intensive care units in Turkey.