Bladder U/S

STEPS
  • Scan the bladder in BOTH transverse AND longitudinal / sagittal orientations, ultrasound probe between the umbilicus and the symphysis pubis.
  • Sweep through the bladder in both planes, from top to bottom in transverse, and from side to side in longitudinal.
  • May need to angle probe inferior if bladder is empty or catheterized (i.e. peer under the symphysis pubis).
Measurement of the bladder volume:
  • Scan the bladder in transverse, find the view where the bladder has the largest dimensions.
  • Freeze the image, click on the 'Calc' button, followed by 'D1'. Measure the AP (Antero-posterior) diameter from inner wall to inner wall and click 'save'.
  • Click on 'D2', measure the transverse diameter, and click 'save'.
bladder AP and transverse
  • Scan the bladder in longitudinal, find the view where the bladder has the largest dimensions.
  • Freeze the image, click on the 'Calc' button, followed by 'D3'. Measure the superior-inferior diameter and click 'save'
  • The estimated bladder volume will be shown in the left lower corner of the screen.
bladder sagittal



Video clip showing bladder scan in a transverse followed by longitudinal orientation





Video of a bladder scan with color doppler showing ureteral jets (ureters ejecting urine into the bladder following ureteral peristalsis)

- normal jets can be seen every 6-10 seconds
- absence of jets can be due to reduced / absent peristaltic motion - may be a sign of obstruction on that side, though this is not a sensitive sign.

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