Almost right away
Each time a catheter
is put into a bladder
, the risk of infection is about 1%, even with the best technique and careful nurse/doctor. When a catheter is left in the bladder, the risk of infection goes up and can be as high as 10% per day.
That's high, but there are many times when it's necessary. If you or someone you know has one, have the patient ask the doctor to take it out as soon as possible.