J Korean Soc Ultrasound Med.  2012 Dec;31(4):233-237.

Usefulness of Doppler Parameter in Patients with Renal Transplantation

• Yoon YC
• Shin BS
• Ohm JY
• Ahn M
• Park MH
• Kim HJ

Abstract

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.

Keyword

Doppler sonography; Ultrasound; Kidney transplantation; Renal resistance index

MeSH Terms

Arteries
Glomerular Filtration Rate
Hemodynamics
Humans
Kidney
Kidney Transplantation
Transplants