title: Are Doppler ultrasonography parameters symmetric between the right and left kidney?
abstract: BACKGROUND
  Among numerous modalities applied for evaluation of kidney diseases, Doppler ultrasonography (DU) provides information about the hemodynamic status of the kidneys. Meanwhile, the variability in DU parameters of the right and left kidney is a matter of controversy. The aim of this study was to determine whether any difference exists between the DU indices of the right and left kidney.
  
  
  METHODS
  Retrospectively, we collected DU findings of 25 healthy potential renal transplant donors. All donors underwent renal DU and multidetector computed tomographic angiography before donor nephrectomy. DU indices, including peak systolic volume (PSV), resistive index (RI), pulsatility index (PI), end-diastolic volume (EDV), and acceleration time (AT), were recorded.
  
  
  RESULTS
  The median age of the donors was 27 (range 23-39) years. The median PSV, RI, EDV, and AT for the right kidney were 29 cm/sec, 0.59, 10.9 cm/sec, and 50 msec, respectively. For the left kidney, the median PSV, RI, EDV, and AT were, respectively, 26.8 cm/sec, 0.60, 10.6 cm/sec, and 43 msec. Among the DU indices, median PI of the right kidney was significantly different from that of the left kidney (1.02 versus 0.95, P = 0.01).
  
  
  CONCLUSIONS
  In conclusion, the present study revealed that right kidney DU indices, except for PI, may not differ from those of the left kidney.
authors.affiliation: Tuberculosis and Lung Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran;
authors.forename: Khalil
authors.initials: K
authors.lastname: Ansarin
authors.forename: Abolhassan Shakeri
authors.initials: AS
authors.lastname: Bavil
authors.forename: Kamyar
authors.initials: K
authors.lastname: Ghabili
authors.forename: Mohammadali M
authors.initials: MM
authors.lastname: Shoja
authors.forename: Hamid T
authors.initials: HT
authors.lastname: Khosroshahi
authors.forename: Babak
authors.initials: B
authors.lastname: Hajipour
authors.forename: R Shane
authors.initials: RS
authors.lastname: Tubbs
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Parvizi