title: Risk factors for acute kidney injury in overweight patients with acute type A aortic dissection: a retrospective study.
abstract: BACKGROUND
  To identify risk factors for acute kidney injury (AKI) in overweight patients who underwent surgery for acute type A aortic dissection (TAAD).
  
  
  METHODS
  A retrospective study including 108 consecutive overweight patients [body mass index (BMI) ≥24] between December 2009 and April 2013 in Beijing Anzhen Hospital has been performed. AKI was defined by Acute Kidney Injury Network (AKIN) criteria, which is based on serum creatinine (sCr) or urine output.
  
  
  RESULTS
  The mean age of the patients was 43.69±9.66 years. Seventy-two patients (66.7%) developed AKI during the postoperative period. A logistic regression analysis was performed to identify two independent risk factors for AKI: elevated preoperative sCr level and 72-h drainage volume. Renal replacement therapy (RRT) was required in 15 patients (13.9%). The overall postoperative mortality rate was 7.4%, 8.3% in AKI group and 5.6% in non-AKI group. There is no statistically significant difference between the two groups (P=0.32).
  
  
  CONCLUSIONS
  A higher incidence of AKI (66.7%) in overweight patients with acute TAAD was confirmed. The logistic regression model identified elevated preoperative sCr level and 72-h drainage volume as independent risk factors for AKI in overweight patients. We should pay more attention to prevent AKI in overweight patients with TAAD.
authors.affiliation: Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing Aortic Disease Center, Beijing 100029, China.
authors.forename: Honglei
authors.initials: H
authors.lastname: Zhao
authors.affiliation: Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing Aortic Disease Center, Beijing 100029, China.
authors.forename: Xudong
authors.initials: X
authors.lastname: Pan
authors.affiliation: Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing Aortic Disease Center, Beijing 100029, China.
authors.forename: Zhizhong
authors.initials: Z
authors.lastname: Gong
authors.affiliation: Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing Aortic Disease Center, Beijing 100029, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zheng
authors.affiliation: Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing Aortic Disease Center, Beijing 100029, China.
authors.forename: Yongmin
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing Aortic Disease Center, Beijing 100029, China.
authors.forename: Junming
authors.initials: J
authors.lastname: Zhu
authors.affiliation: Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing Aortic Disease Center, Beijing 100029, China.
authors.forename: Lizhong
authors.initials: L
authors.lastname: Sun
keywords: Acute kidney injury (AKI); Sun’s procedure; body mass index (BMI); risk factors; type A aortic dissection (TAAD)