Scintigraphic assessment of lower urinary tract function in children with and without outflow tract obstruction.

Analysis of lower urinary tract function with an extension of standard renography with 123I-hippurate was carried out in 199 children. Maximum bladder capacity, voiding and residual bladder volumes, average and maximum urine flow rates and urine flow patterns were estimated. The index of urine transport (IUT), representing the relationship between urine flow rate and bladder volume, was introduced as a measure of outflow capability.

Urodynamics: a noninvasive screening of lower urinary tract function in children with radioisotopes.

A noninvasive intravenous assessment of lower urinary tract function with 123I-hippurate was carried out in 129 children without suspicion of lower urinary tract outflow pathology. Without increasing the radiation burden standard renography was extended by lower urinary tract function analysis in the same session. The maximum bladder capacity, voiding and residual bladder volumes, average and maximum urine flow rates were calculated and the relation between the urine flow rate and bladder volume expressed as the index of urine transport (IUT).