Fig. 4
From: Overview of point-of-care abdominal ultrasound in emergency and critical care
Ultrasound images in a 78-year-old man who presented with difficult urination. The patient had a history of benign prostatic hypertrophy. Standard urethral catheterization attempted by an experienced emergency nurse and an experienced emergency physician failed due to complicated urethral bleeding. a Bedside ultrasound revealed the tip of the catheter in a part of the posterior and bulbar urethra (arrows) while the progress was obstructed. Judging from the location of the internal urethral orifice, a part of the urethra was thus determined to be bent. The circle denotes the location of the internal urethral orifice. b The bent part of the urethra had become blunt with transrectal pressure using an inserted index finger (broken arrows). The arrows denote the tip of the catheter, and the circle denotes the location of the internal urethral orifice. c Ultrasound-guided catheterization with transrectal pressure without forceful manipulation was successful on the first attempt. Arrowheads denote the inflated balloon