How is diagnostic hydrodistention performed in the evaluation of interstitial cystitis/bladder pain syndrome (IC/BPS)?

Updated: Dec 04, 2020
  • Author: Eric S Rovner, MD; Chief Editor: Edward David Kim, MD, FACS  more...
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Diagnostic hydrodistention (ie, overdistention) is performed by placing the irrigation fluid at 60-80 cm water above the patient's bladder. Fluid is run into the bladder under gravity until it slows to a drip. Manual compression of the urethra around the cystoscope sheath should be performed as the bladder fills to help prevent the escape of fluid and to ascertain the true bladder capacity. Continuous intravesical observation of the bladder wall is necessary to note perforation and extravasation as the bladder is filled. A seemingly large bladder capacity or exceedingly prolonged filling time without deceleration of the filling rate may indicate bladder perforation.

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