title: Acute kidney failure in neonatal period.
abstract: BACKGROUND
  Acute kidney failure (AKF) is a common clinical problem in neonatal intensive care units and is usually associated with a contributing condition such as sepsis, asphyxia, and heart failure. The aim of this study was to determine the types, frequency of associated contributing conditions, and short-term outcome of neonatal AKF.
  
  
  METHODS
  Medical records of neonates with a diagnosis of AKF from March 2003 to September 2006 were studied in a tertiary care children's hospital in Tabriz, Iran.
  
  
  RESULTS
  Of 6042 hospitalized neonates, 151 with documented AKF (100 boys and 51 girls) were reviewed in the study. Ninety-one patients (60.3%) had been referred from other cities. Fifty-seven patients (37.7%) developed AKF following a surgery. Causes of AKF were intrinsic kidney failure in 52.3%, prerenal in 42.4%, and postrenal in 5.3%. Oliguria was observed in 72.2% of the patients. Perinatal asphyxia was present in 29.8% of the neonates, sepsis in 28.5%, respiratory distress syndrome in 25.2%, dehydration in 24.2%, and heart failure in 21.2%. Most patients (85.4%) had more than 1 associated contributing condition. Mortality rate was 20.5%. Most patients (76.2%) were discharged with normal kidney function and 3.3% with diminished kidney function. Initial admission to NICU, female sex, septicemia, and the need for mechanical ventilation were associated with a higher mortality rate.
  
  
  CONCLUSIONS
  The frequency of associated contributing conditions and short-term outcome of neonatal AKF in our institution is comparable with other studies; however, intrinsic kidney failure comprises the most common form of AKF in our patients.
authors.affiliation: Department of Pediatric Nephrology, Tabriz University of Medical Sciences, Tabriz, Iran. mortazavi_fakhri@yahoo.co.uk
authors.forename: Fakhrossadat
authors.initials: F
authors.lastname: Mortazavi
authors.forename: Sedigeh
authors.initials: S
authors.lastname: Hosseinpour Sakha
authors.forename: Nayyer
authors.initials: N
authors.lastname: Nejati
mesh_terms: D058186:Acute Kidney Injury / Q000401:mortality* / Q000628:therapy; D001238:Asphyxia Neonatorum / Q000401:mortality*; D003681:Dehydration / Q000401:mortality; D005260:Female; D005865:Gestational Age; D006333:Heart Failure / Q000401:mortality*; D017052:Hospital Mortality; D006801:Humans; D007231:Infant, Newborn; D007363:Intensive Care Units, Neonatal / Q000706:statistics & numerical data*; D007492:Iran / Q000453:epidemiology; D008297:Male; D012127:Respiratory Distress Syndrome, Newborn / Q000401:mortality; D018805:Sepsis / Q000401:mortality*