Abstract
Objectives: No objective parameters for renalallograft evaluation have yet been describedfor Tc99m-Ethylenedicystine. This studyevaluates the diagnostic significance ofdifferent quantitative and semi-quantitativeparameters of renal allograft scintigraphyusing Tc99m-Ethylenedicystine.Methods: A total of 72 renal dynamicscintigraphic studies were performed within2-weeks of renal transplantation in 42patients. The graft perfusion, kidney/aortaratio, washout index and retention index werederived from all studies. All these parameterswere evaluated for their ability to distinguishbetween a normal graft, a graft with acuterejection (AR), and a graft with acute tubularnecrosis (ATN). Histopathological verificationof diagnosis was obtained in all cases.Results: Studies were subdivided into 3groups according to histopathological findings:acute rejection (n = 42), normal (n = 18) andacute tubular necrosis (n = 12). Normalallografts were visualized with in2.66 ± 0.59 seconds of visualization ofabdominal aorta. The K/A ratio, wash out indexand retention index was 15.22 ± 6.86,1.67 ± 0.45, and 5.48 ± 0.98 respectively.Allografts with ATN were visualized with in3.36 ± 0.80 seconds of visualization ofabdominal aorta. The K/A ratio, wash out indexand retention index was 12.73 ± 6.74,0.60 ± 0.14, and 9.18 ± 1.48 respectively.In AR, allografts were visualized15.18 ± 9.48 seconds after visualization ofabdominal aorta. The K/A ratio, wash out indexand retention index was 7.07 ± 2.15,0.63 ± 0.11, and 2.26 ± 1.28 respectively.Conclusions: Retention index can separateall the three condition of normal, acuterejection and acute tubular necrosis from eachother. Retention index of <4 suggests acuterejection, a value between 4 and 7 suggestsnormal allograft and avalue of ≥7 is suggestive of acutetubular necrosis. However, perfusion, K/A ratioand washout index can not segregate all thethree groups.
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Barai, S., Kumar, R., Mehta, S.N. et al. Diagnostic significance of semiquantitative and quantitative parameters of Tc99m-Ethylenedicystine renal allograft scintigraphy. Int Urol Nephrol 35, 451–456 (2003). https://doi.org/10.1023/B:UROL.0000025623.36472.d8
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DOI: https://doi.org/10.1023/B:UROL.0000025623.36472.d8