What is the role of a bladder scan in the workup of bladder dysfunction?

Updated: Jan 04, 2019
  • Author: Gregory T Carter, MD, MS; Chief Editor: Elizabeth A Moberg-Wolff, MD  more...
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Residual urine volume is usually determined by means of a bladder scan after voiding; it may be measured directly by means of catheterization if bladder scanning is not available. Residual urine volume reflects bladder and outlet activity during the emptying phase of micturition. Up to 100 mL of postvoid residual urine with a voiding frequency greater than every 2 hours is acceptable if the patient is not experiencing frequent urinary tract infections.

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