<prompt> What is the ideal method to remove a retained Foleys catheter if its balloon does not deflate?Over-distend the balloon with water till it burstsDissolve the balloon by injecting etherCT-guided rupture of balloonUSG guided rupture of balloon  <response>: The ideal method to remove a retained Foleys catheter if its balloon does not deflate is by USG guided rupture of balloon after inflating it with 20ml water. It should be followed by a cystoscopic examination to rule out any fragments which can lead to bladder stones. 