[What is the normal bladder volume? 400 to 600 ml.] See:
A healthy bladder: a consensus statement [Full Text HTML] [Full Text PDF]
AUA guideline for the diagnosis and treatment of interstitial cystitis/bladder pain syndrome [PubMed Abstract] [Full Text HTML amended 2014] [Treatment Algorithm PDF]
J Urol. 2011 Jun;185(6):2162-70. doi: 10.1016/j.juro.2011.03.064. Epub 2011 Apr 16.
