The aim of this study from HIP Investigator Dr. Heidi Brown was to determine the accuracy of postvoid residual (PVR) by subtraction as compared with objective measurement by bladder scan or catheterization. This study is a secondary analysis of postoperative patients who underwent avoiding trial by retrograde bladder instillation.
The study found that although subtraction PVR correlates well with objective PVR measurement, almost half of women with a PVR volume of greater than 200 mL by objective measurement are miscategorized as voiding normally by subtraction PVR.
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