Dynamic evaluation of the results of pyeloplasty using pressure-flow studies

Dynamic assessment using pressure flow studies was made in 11 patients to assess the patency of their pyeloplasty. In 5 the study was in the immediate post-operative period and lead to a further exploration in 2 patients. In 6 the study was performed many years after the pyeloplasty and showed that despite symptoms only 2 patients needed a further procedure. Dynamic assessment is a useful technique in these difficult diagnostic problems.