title: Relationship among Mortality of Patients with Acute Kidney Injury after Cardiac Surgery, Fluid Balance and Ultrafiltration of Renal Replacement Therapy: An Observational Study.
abstract: OBJECTIVE
  The study aimed to investigate the relationship among mortality of patients with cardiac surgery-associated acute kidney injury (CSA-AKI), fluid balance, and ultrafiltration of renal replacement therapy (RRT).
  
  
  METHODS
  From January 2009 to October 2015, hospitalized patients with CSA-AKI receiving continuous or prolonged intermittent RRT were screened. The effects of fluid balance and ultrafiltration of RRT on clinical outcome were analyzed.
  
  
  RESULTS
  The 30-day mortality of all the 63 patients in the study was 58.6%. Compared with the death group, the survival group had a significantly lower fluid balance, larger ultrafiltration volume, and similar ultrafiltration rate during the first 3 days of RRT. Multivariate Cox regression analysis revealed that positive fluid balance during the first day of RRT, cardiac function of grade IV, and higher Sequential Organ Failure Assessment score were independent risk factors of 30-day mortality.
  
  
  CONCLUSIONS
  Fluid balance was more relevant to short-term prognosis of CSA-AKI-RRT patients than ultrafiltration volume or ultrafiltration rate.
authors.affiliation: Department of Nephrology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
authors.forename: Buyun
authors.initials: B
authors.lastname: Wu
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
authors.forename: Si
authors.initials: S
authors.lastname: Liu
authors.forename: Xiangbao
authors.initials: X
authors.lastname: Yu
authors.forename: Yamei
authors.initials: Y
authors.lastname: Zhu
authors.forename: Huijuan
authors.initials: H
authors.lastname: Mao
authors.forename: Changying
authors.initials: C
authors.lastname: Xing
mesh_terms: D058186:Acute Kidney Injury / Q000401:mortality* / Q000628:therapy; D000328:Adult; D000368:Aged; D006348:Cardiac Surgical Procedures / Q000401:mortality*; D002320:Cardiovascular Physiological Phenomena; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012044:Regression Analysis; D017582:Renal Replacement Therapy / Q000379:methods*; D012189:Retrospective Studies; D016896:Treatment Outcome; D014462:Ultrafiltration; D014882:Water-Electrolyte Balance