title: Reference ranges for sonographic renal dimensions in preterm infants.
abstract: BACKGROUND
  Ultrasonographic measurement of kidney dimensions is important in evaluation of renal disease in preterm infants who have multiple comorbidities that affect renal function.
  
  
  OBJECTIVE
  The purpose of this study was to determine the reference ranges of kidney dimensions in preterm newborns and to provide a chart to use easily in daily practice.
  
  
  METHODS
  We evaluated renal dimensions in 498 preterm infants with a gestational age of <37 weeks using sonography within the first week of life. We statistically analyzed the relationships between all dimensions and gender, gestational age (based on the last menstrual period), height and weight. Minimum and maximum values of dimensions were defined.
  
  
  RESULTS
  All dimensions of the kidneys were statistically different in boys and girls (P < 0.05). Both longitudinal and anteroposterior dimensions of the right and left kidneys showed high correlation with gestational age, weight and height in girls and boys. Weight correlated best with dimensions.
  
  
  CONCLUSIONS
  Nomograms from these data can be used to determine an abnormality in kidneys of preterm newborns.
authors.affiliation: Department of Pediatrics, The Ministry of Health Tepecik Teaching and Research Hospital, Gaziler Street, Yenisehir, Izmir, Turkey.
authors.forename: Aydin
authors.initials: A
authors.lastname: Erdemir
authors.forename: Zelal
authors.initials: Z
authors.lastname: Kahramaner
authors.forename: Ebru
authors.initials: E
authors.lastname: Cicek
authors.forename: Ebru
authors.initials: E
authors.lastname: Turkoglu
authors.forename: Hese
authors.initials: H
authors.lastname: Cosar
authors.forename: Sumer
authors.initials: S
authors.lastname: Sutcuoglu
authors.forename: Esra Arun
authors.initials: EA
authors.lastname: Ozer
mesh_terms: D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D007668:Kidney / Q000000981:diagnostic imaging*; D008297:Male; D009929:Organ Size; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014421:Turkey / Q000453:epidemiology; D014463:Ultrasonography / Q000592:standards* / Q000706:statistics & numerical data*
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