These days, portable automated bladder scanners are widely used to check for urinary retention in hospitalized patients. They certainly avoid the need for invasive chatheterizations but cannot differentiate between urine and other fluid collections such as ascites. We recently published a case where bladder scanner falsely read ~800cc of urine but POCUS demonstrated that it actually was pelvic ascites in a patient with cirrhosis. In the transverse plane, uterus was seen floating in the pelvic ascites and together with ovarian ligaments, giving the appearance of a “TIE fighter”. Here is the video abstract:

Here is another example