Janjua Q M, Saeed S, Mahmud Q, Naqvi Z, Latif W, Malik S.
Effect Of Gender And BMI On Maximum Urine Holding Capacity Of The Urinary Bladder.
Biomedica Jan ;33(2):128-30.

Background and Objectives: Micturition reflex is long been taught as an interplay of autonomic and somatic nervous system. This reflex is expected to vary with bladder-habits, gender and BMI differences but no study supports this theory sufficiently. The objective of this study is to provide evidence for variation in bladder capacity to hold urine by bladder-habits, gender and BMI. Methods: A total of 69 1st year dentistry students (20 males & 49 females) who consented were asked to empty their bladder naturally followed by drinking measured amounts of mineral water in glass-beaker to the level that they would not be able to hold urine any further. They were advised to note down all their feelings during that process as mentioned in the response form. They also accounted their usual bladder-habit of postponing the visit and lastly expressed that they passed urine in presence of favorable or unfavorable condition. Results: Male students due to comparatively greater mean height and weight had significantly higher maximum capacity of bladder to hold urine independent of BMI. Likewise there was gender-wise significant difference in appearance of 1st desire to micturate, discomfort and pain in terms of filling capacity of bladder. Micturition-postponing-behavior did not affect significantly the maximum capacity to hold urine but played significant role on voluntary control of micturition under unfavorable circumstances. Conclusions: Bladder capacity and voluntary control varies with gender and accommodating behavior respectively. This study may help in establishing a data base in our study population and may add to scientific knowledge.

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