Renal vascular transit time and tubular transit time dispersion for 99Tcm-mag3

Academic Article

Abstract

  • Renal transit time usually refers to tubular transit time, as introduced by Taplin, but other measures of renal transit have been proposed. Here we examine the vascular transit time (VTT, following Rutland) and the standard deviation of tubular transit time (SDTT, following Britton) in a group of 30 patients having baseline and ACE-inhibitor 99Tcm-MAG3 renography prior to arteriography. A same-day, low-dose/high-dose protocol was used for renography; only the post-captopril dose was high enough to measure VTT. Pre-captopril, the Spearman rank correlation coefficient for SDTT was rho = 0.52 (n = 53 kidneys; P < 0.0002); post-captopril, rho = 0.54 (n = 49 kidneys; P < 0.0002). For VTT, the post-captopril value was rho = 0.24 (n = 30 kidneys; N.S.). For comparison, the same statistics were calculated for Taplinʼs original measure of transit time: the time from injection to maximum count rate (peak time). Precaptopril, for peak time, rho was 0.47 (n = 53 kidneys; P < 0.001); post-captopril, rho was 0.39 (n = 50 kidneys, P < 0.01). These findings confirm the diagnostic value of SDTT but not of VTT. SDTT correlated better than peak time with the arteriographic findings. © 1997 Chapman ami Hall Ltd.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Pubmed Id

  • 15215700
  • Author List

  • Russell CD; Japanwalla M; Khan S; Scott JW; Dubovsky EV
  • Start Page

  • 832
  • End Page

  • 838
  • Volume

  • 18
  • Issue

  • 9