A Correlation Between Direct and Indirect Doppler Ultrasonographic Measures in Transplant Renal Artery Stenosis

M. R. Ardalan, M. K. Tarzamani, Mohammadali Mohajel Shoja

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Screening for transplant renal artery stenosis (TRAS) with Doppler ultrasonography (DUS) is increasingly used in the era of kidney transplantation. Direct Doppler study of the stenotic site is a time- consuming and difficult method that requires an angle of interrogation parallel to the vessel. The aim of this study was to assess the correlation between the direct-PSVs (peak systolic velocity at the stenotic site), PSVs/PSVi (PSVi, peak systolic velocity of the adjacent iliac artery)-and indirect-intrarenal arterial resistive index (RI), perfusion index (PI), acceleration time (AT)-DUS findings in the kidney transplant recipients with TRAS. We performed 26 DUS studies of both intrarenal and main renal arteries in 19 TRAS patients (who had PSVs > 150 cm/s, PSVs/PSVi > 2). The mean values of PSVs and PSVs/PSVi were 212 ± 44.19 cm/s and 2.77 ± 0.77, respectively. The mean intrarenal RI, PI, and AT were 0.48 ± 0.065, 0.70 ± 0.12, and 177.8 ± 54.6 msec, respectively. A significant negative correlation was found between PSVs and intrarenal RI (Pearson correlation coefficient (r) = -0.4, two-tailed P = .043). No correlation was found between intrarenal PI or AT and the direct DUS findings (P > .05). With a cutoff level of 0.55 for intrarenal resistive index, the sensitivity of this parameter to detect proximal renal arterial stenosis was about 85%. Conclusively, PSVs and intrarenal RI were negatively correlated. Intrarenal resistive index can be used as an screening measure for detection of TRAS.

Original languageEnglish (US)
Pages (from-to)1436-1438
Number of pages3
JournalTransplantation Proceedings
Issue number5
StatePublished - Jun 1 2007
Externally publishedYes

ASJC Scopus subject areas

  • Surgery
  • Transplantation


Dive into the research topics of 'A Correlation Between Direct and Indirect Doppler Ultrasonographic Measures in Transplant Renal Artery Stenosis'. Together they form a unique fingerprint.

Cite this