The idea that your bladder shrinks as you get older may be nothing more than an old wives' tale according to a University of Pittsburgh study. The feeling may, however, signal a treatable underlying condition. Results are to be presented today at the annual meeting of the American Urological Association (AUA) in San Antonio, and will be published in abstract 1218 in the AUA proceedings.
"Many of us, after reaching a certain age, notice that we have to urinate more frequently and with more urgency. The standard assumption, that seems to have become part of our folklore, is that your bladder shrinks as you get older. We found that this may not be the case," said Neil Resnick, M.D., professor and chief, division of geriatric medicine, University of Pittsburgh School of Medicine.
In the study, the researchers compared data on a number of variables including bladder capacity and stability, urethral closure pressure, voiding flow rate and detrusor contraction strength from 95 females between the ages of 22 and 90. The researchers found that while bladder and urethral function deteriorate throughout adult life, bladder capacity rarely changes.
Women with normally aging bladders had weaker bladder sensation; while women who experienced increased bladder sensation actually had an underlying condition called detrusor overactivity (DO). DO is a common condition, often referred to as overactive bladder, where the detrusor muscle that controls the emptying of the bladder contracts involuntarily, creating a strong, sometimes uncontrollable urge to empty the bladder.