title: Factors influencing intensive care unit length of stay after surgery for acute aortic dissection type A.
abstract: BACKGROUND
  Operative mortality after acute aortic dissection type A is still high, and prolonged stay at the intensive care unit is common. Little has been documented about factors influencing the intensive care unit length of stay. The aim of this study was to determine such variables.
  
  
  METHODS
  During a 10-year period, 67 patients (47 male, 20 female) were operated on for acute aortic dissection type A. In 42 patients (63%), an ascending aortic replacement was performed, 23 patients (34%) underwent a Bentall procedure, and 2 patients (3%) received a valve-sparing David type of operation. In 14 of these cases (20%), an additional partial or total arch replacement was performed.
  
  
  RESULTS
  Hospital mortality was 9 of 67 (14%). Median postoperative intensive care unit length of stay was 5 days (range, 1 to 72 days). Intensive care unit stay was in univariate analysis significantly influenced by the following factors: age (p = 0.008), body mass index (p = 0.039), cardiopulmonary bypass time (p = 0.018), aortic cross-clamp time (p = 0.031), postoperative low cardiac output syndrome (p < 0.001), and postoperative lactate levels (p = 0.01). By multivariate analysis, age (p = 0.012), cardiopulmonary bypass time (p = 0.037), and the presence of a postoperative low cardiac output syndrome (p < 0.001) significantly influenced intensive care unit stay.
  
  
  CONCLUSIONS
  Stay in the intensive care unit after operation for acute aortic dissection type A seems to be determined by age, cardiopulmonary bypass time, and the postoperative presence of a low cardiac output syndrome.
authors.affiliation: Department of Cardiac Surgery, Innsbruck University Hospital, Austria.
authors.forename: Daniel
authors.initials: D
authors.lastname: Hoefer
authors.forename: Elfriede
authors.initials: E
authors.lastname: Ruttmann
authors.forename: Markus
authors.initials: M
authors.lastname: Riha
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Schobersberger
authors.forename: Andreas
authors.initials: A
authors.lastname: Mayr
authors.forename: Guenther
authors.initials: G
authors.lastname: Laufer
authors.forename: Johannes
authors.initials: J
authors.lastname: Bonatti
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000784:Aortic Dissection / Q000401:mortality / Q000503:physiopathology / Q000601:surgery*; D001014:Aortic Aneurysm / Q000401:mortality / Q000503:physiopathology / Q000601:surgery*; D001317:Austria / Q000453:epidemiology; D002303:Cardiac Output, Low; D002315:Cardiopulmonary Bypass; D005260:Female; D017052:Hospital Mortality; D006785:Hospitals, University; D006801:Humans; D007362:Intensive Care Units / Q000706:statistics & numerical data*; D007902:Length of Stay; D008297:Male; D008875:Middle Aged