PURPOSE: To evaluate and determine Doppler criteria for predicting a severe transplant @entity2791 (80%-99% diameter reduction) and to compare the Doppler findings in @entity1 with end-to-end and end-to-side @entity254 . METHODS: We performed Doppler sonography on 16 consecutive @entity1 with transplant @entity2791 (TRAS) confirmed by digital subtraction arteriography (DSA). Fourteen @entity1 had end-to-end @entity254 , and 2 had end-to-side @entity254 . Eleven @entity1 were re-evaluated with color Doppler sonography within 4 days after intervention. Seven Doppler parameters, including the peak systolic velocity (PSV) in the renal, iliac and interlobar artery, Pre-PSV ratio (the ratio of the PSV in the renal artery to that in the iliac artery), Post-PSV ratio (the ratio of the PSV in the renal artery to that in the interlobar arteries, acceleration time and resistance index, were measured. In the @entity1 with severe TRAS the measurements of these parameters were compared before and after successful intervention. RESULTS: In the 16 @entity1 with a single transplanted kidney, arteriography demonstrated 14 main renal arteries with severe @entity850 , and 3 renal arteries with moderate @entity850 . When using the cutoff values of Post-PSV ratio >13, renal artery PSV >4 m/sec, acceleration time >0.06 second, and resistance index <0.5 for the detection of all 14 severe @entity850 , the sensitivities were 100%, 71%, 93%, and 50%, respectively. For assessing all 14 severe @entity850 and 12 severe @entity850 of end-to-end @entity254 , the cutoff value of Pre-PSV ratio >5 had sensitivities of 86% and 100%, respectively. Pre-PSV ratios in severe @entity850 of end-to-end @entity254 (range, 5.1-11.5) were significantly greater than those recorded in severe @entity850 of end-to-side @entity254 (range, 2.8-3.1). Statistically significant differences before and after successful intervention were found for all 7 Doppler parameters in the 7 @entity1 with severe @entity850 . CONCLUSIONS: An 80%-99% diameter reduction of the renal artery can be diagnosed based on a Post-PSV ratio >13 for @entity1 with either end-to-end or end-to-side @entity254 . A Pre-PSV ratio >5 for @entity1 with end-to-end @entity254 and acceleration time >0.06 second are helpful in the diagnosis of severe TRAS.

Evaluation of severe transplant XXXX with Doppler sonography.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity254 :: ('MESH:C563598', 'Disease') :: ['anastomosis'] @entity2791 :: ('MESH:D012078', 'Disease') :: ['renal artery stenosis'] @entity850 :: ('MESH:D003251', 'Disease') :: ['stenoses', 'stenosis']
@entity2791 :: (MESH:D012078,Disease) :: ['renal artery stenosis']
