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Studies have shown that the urothelium has a transport function and that urine composition changes on its way through the urinary tract. In this study, we investigated the hypothesis that the composition of voided urine differs from and does not reflect that of the renal pelvis. Urine samples were obtained from the renal pelvis and voided urine of 18 healthy volunteers (mean age 36.2 ± 5.1 SD years,...
Studies in our and other laboratories have negated the general assumption that the urothelium functions as a simple conduit and support the concept of a dynamic urothelium. Based on this concept, we investigated the hypothesis that urine undergoes changes during its passage in the ureter. Urine samples were separately collected from the renal pelvis and ureters of 23 volunteers (15 men, eight women,...
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