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BioMed Research International
Volume 2013 (2013), Article ID 323491, 5 pages
Clinical Study

Incidence and Risk Factors of Early Delirium after Cardiac Surgery

Clinic of Anesthesiology and Intensive Care, Faculty of Medicine, Vilnius University, Siltnamiu 29, 04130 Vilnius, Lithuania

Received 6 April 2013; Revised 11 August 2013; Accepted 12 August 2013

Academic Editor: Matthias Thielmann

Copyright © 2013 Ieva Norkienė et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Introduction. The aim of our study was to identify the incidence and risk factors of delirium after cardiac surgery implementing Intensive Care Delirium Screening Checklist (ICDSC). Material and Methods. 87 patients, undergoing cardiac surgery at Vilnius University hospital, were prospectively monitored for postoperative delirium development, during intensive care unit stay. Results. The incidence of postoperative delirium was 13.30%. No statistically relevant preoperative predictors of delirium were found. The duration of surgery was significantly longer in delirium group ( versus hours, ). Patients in delirium group more often had blood product transfusions (1.50 (± 1.57) versus 0.49 (± 0.91) ) and had a higher incidence of low cardiac output syndrome (33.30% versus 3.00%, ); they were significantly longer mechanically ventilated ( versus 8.78 ± 4.77 ( )) hours (OR = 1.15 ( )) and had twice longer ICU stay ( versus 2.60 ± 1.10 ( )) days (OR = 1.91 ( )). Conclusions. The incidence of delirium after cardiac surgery was 13.3%. Independent predictors of delirium were duration of postoperative mechanical ventilation and intensive care unit stay.