Multidetector CT Angiography for Pre-Operative Evaluation of Living Renal Donors - An Observational Study at IGIMS, Patna

BACKGROUND We wanted to assess the renal abnormalities including parenchymal, arterial, venous and collecting systems that preclude renal donation or altered surgical approach on the basis of CT angiography. METHODS This is a hospital based retrospective observational study. 55 donors (110 kidneys) had undergone preoperative CT renal angiography. The data were collected from last 3 years (December 2016 - December 2019) and analyzed. Two different radiologists interpreted the results unaware of the findings of each other. Final report depended upon the common consensus of both the radiologists. RESULTS The percentage of multiple renal arteries, early branching of renal artery and retrocaval right renal artery were 30 %, 5.45 % and 3.64 % respectively. The percentage of multiple renal veins, circumaortic renal vein and retroaortic renal veins were 7.27 %, 5.45 % and 1.82 % respectively. The late confluence of renal vein (left side) was found in 1 donor. Renal parenchymal abnormalities were detected in the form of simple cortical cysts and renal calculus. No variation or abnormality was detected in the collecting system. CONCLUSIONS Multi detector computed tomography (MDCT) angiography provides an accurate and reliable tool to evaluate the renal parenchyma, collecting system, vascular anatomy and their variations in the living renal donor. It guides the surgeon immensely in decision making regarding proper donor selection and as to which kidney should be harvested. KEY WORDS MDCT Angiography, Renal Vessels, Anatomic Variations, Living Renal Donor