Total respiratory support time was lower in the EVAR group than in the OSR group ( 59.3 hours vs. 180.3 hours ; p = .007 ) , as were pulmonary complications ( 15.4 % vs. 41.5 % , respectively ; p = .050 ) , total blood transfusion ( 6.8 vs. 10.9 , respectively ; p = .020 ) , and duration of ICU stay ( 7 days vs. 11.9 days , respectively ; p = .010 ) .