Abstract
This study was carried out to determine whether cystography documenting reflux in a stented system is a sensitive examination for patency of double-pigtail ureteral stents. We demonstrated stent patency in all seven of the studies performed prior to extracorporeal shock wave lithotripsy (ESWL) and 7 of 11 studies performed after ESWL (one false-negative result; one patient refused further evaluation). Of the nonrefluxing studies, there was 100% correlation between this finding and stent obstruction. We conclude that cystography is a sensitive examination for assessing stent patency.
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