Comparison of Resistive Index in Live Kidney Donors Before and Aer Nephrectomy

Background/Objective: Obstruction of solitary"nkidney is a serious problem because it usually leads"nto elevation of serum creatinin. Tests using iodinated"ncontrast materials are contraindicated. Doppler"nultrasound (DU) with measurement of the renal"nresistive index (RI) is useful in this regard. Obstruction"nleads to changes in the hemodynamics of the kidney"nwith increase in the RI."nPatients and Methods: The study included 41 healthy"nlive kidney donors. There were 38 males and three"nfemales with a mean age of 30 years. DU of the two"nkidneys was done the day before nephrectomy with"nmeasurement of the RI of each kidney in three levels"n(main, interlobar and interlobular). After nephrectomy,"nthe RI of the remaining kidney was measured on days"n7 and 90. The mean RI of the remaining kidney before"nnephrectomy was compared with values at different"ntime points after nephrectomy."nResults: The left kidney was selected for nephrectomy"nin 35 donors and the right one was used in the"nremaining six. There was difference between the mean"nRI of the right and left kidneys before nephrectomy"nin the interlobar and interlobular artery level. The"nmean RI of the remaining kidney increased 90 days"nafter nephrectomy but not at the seventh day. There"nwas no difference between the mean RI in three levels"nbefore nephrectomy and on day 7. The mean RI of"nthe left remaining kidney after the right nephrectomy"n(six donors) was compared with the right remaining"nkidney after the left nephrectomy (35 donors). The"ndifference of RI was statistically signiificant only in"nthe main artery level on day 90."nKeywords: Resistive Index(RI), Live Donor"nNephrectomy, Single Kidney