Foley catheters are flexible tubes fixed into the bladder with a small inflated balloon at one end, and connected to a urine collection bag which is usually attached to the leg or the belly of the patients. Catheters are used on a permanent or temporary basis in cases of urine retention and incontinence, associated with different kind of illnesses and  certain medical interventions 

One in every four men over 70 will suffer from acute urinary retention