MEC is used to collect urine as it drains out of bladder and send it to a collection bag strapped to leg or bed. MEC are designed for men whose bladders are able to drain urine but who have trouble controlling when it’s released. Some of these conditions are: Urinary incontinence. This condition happens when you no longer have control over your bladder and can’t prevent urine from leaking out of your urethra. Overactive bladder (OAB). An OAB causes sudden urges to urinate that you can’t control. Dementia. Incontinence may develop in the later stages of dementia. Mobility issues. Some injuries or conditions make it difficult to get to the bathroom on time or at all.