Falsely elevated postvoid residual urine in pregnant women.

Portable ultrasound assessment of postmicturition bladder for residual urine volume is rapid, accurate, and precise. However, other cystic pelvic pathologic conditions may present as a false-positive finding on the ultrasound. We describe two cases in which the residual urine was falsely detected as being elevated due to unsuspected pregnancy. Copyright 2003 Wiley-Liss, Inc.