In this paper will discuss the frequency, risk factors and outcome of patient readmission treatment in the intensive care unit. The general causes of readmission have been described, but research has also been conducted at the Sveti Duh Hospital. The study sought to determine the frequency of re-admission of general surgical patients in the only intensive care that are the reasons for re-admission. Mortality of patients after re-admission to the ICU was 17.4%. By conducting a retrospective study, the aim was to show the causes and frequency of re-admission of patients to the ICU. Frequency of re-admission of general surgical patients to the intensive care unit KB Sveti Duh, Zagreb was 3.94% in the period from January 1, 2020 to December 31, 2020. The average length of the first stay after the operation was 4 days, and the average time of hospitalization in the ICU for re-admission was 7 days. Average age of the subjects was 73.26 years, while patients with biliary hypertension and diabetes mellitusd thype 2 were most often associated. The most common reason for readmission to the ICU was reoperation. After returning to the ICU, oxygen therapy was required, non-invasive oxygen therapy was sufficient for most subjects, and a smaller number required an invasive method of treatment through mechanical ventilation.