An evaluation of 170 diagnostic pressure flow studies of the upper urinary tract.

An analysis of 170 pressure flow perfusion studies reveals that they can be valuable in patients of all ages, but particularly so in children, and in a variety of clinical conditions. The complication rate is low and there are few patients in whom these studies do not provide a clear-cut answer on the degree of obstruction. They can be recommended as useful and, at times, invaluable clinical tools.