Journal of Korean Society of Ultrasound in Medicine 2012;31(4): 233-237.
Usefulness of Doppler Parameter in Patients with Renal Transplantation.
Yeo Chang Yoon, Byung Seok Shin, Joon Young Ohm, Moonsang Ahn, Mi Hyun Park, Ho Jun Kim
1Department of Radiology, Chungnam National University Hospital, Daejeon, Korea.
2Department of Surgery, Chungnam National University Hospital, Daejeon, Korea.
3Department of Radiology, Dankook University Hospital, Cheonan, Korea.
4Department of Radiology, Konyang University Hospital, Daejeon, Korea.
  Published online: December 31, 2012.
PURPOSE: The purpose of this study is to assess the usefulness of Doppler parameters in transplanted kidney function. MATERIALS AND METHODS: Doppler parameters, including resistive index (RI), pulsatility index (PI), peak systolic velocity (PSV), and end diastolic velocity (EDV) were measured in the interlobar artery of 55 transplant recipients. Patients were grouped according to glomerular filtration rate (GFR): Group A (GFR < 30 ml / min / 1.73 m2, n = 27) and group B (GFR > or = 30 ml / min / 1.73 m2, n = 28). Doppler parameters were compared between groups and correlated with the GFR. RESULTS: GFR (40.1 +/- 26.9) showed a significant negative correlation with RI (0.69 +/- .08) (p = .002, r = -.414). RI (0.72 vs. 0.67), PI (1.42 vs. 1.23), and EDV (10.5 vs. 15.3) differed significantly between groups (p < .05), however, PSV was not (36.9 vs. 47.1). Patients in group A (n = 11) with a lower RI than the mean had significantly lower PSV (31.7 vs. 45.1; p = .027) and EDV (11.1 vs. 16.7; p = .017), compared with such patients in group B (n = 21). CONCLUSIONS: Doppler parameters are useful for evaluation of function of transplanted kidney. Even if the RI is normal, PSV and EDV may be used as hemodynamic indicators.
Keywords: Doppler sonography; Ultrasound; Kidney transplantation; Renal resistance index
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