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Bladder Capacity

The prediction of normal bladder capacity aids the diagnosis of abnormal voiding patterns. It is typically accepted that the bladder capacity of a baby during the first year equals the weight of baby in kilograms times 7-10 milliliters.

A study with 200 children (132 with normal voiding, 68 frequent and infrequent voiders) demonstrated that from approximately 1-12 years of age, that age plus 2 equals the bladder size in ounces (? 30 = volume mL). After that, the teenager assumes an adult-size bladder, typically around 400 cc. Clinically infrequent voiding causes an increase in bladder size. Clinically frequent voiding causes a decrease in blad­der size (82). Post-void residual is generally accepted as 10% of bladder capacity, taking into account the appropriate bladder capacity for age.

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Source: Alexander M.A., Matthews D.J.. Pediatric Rehabilitation: Principles and Practice. 4 th. åd. — New York: Demos Medical Publishing,2010. — 540 ð.. 2010
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