"The Foley catheter is a urinary catheter with a balloon at its distal tip, which is inflated post-insertion to ensure that the catheter remains in the bladder. Originally inflation of the balloon required the instillation of fluid or air via a separate port, next to the external end of the catheter, but modern catheters have a built-in reservoir that can be used to inflate the balloon."
"The American urologist Frederic E B Foley (1891-1966) 3 first provided details of his now eponymous "haemostatic bag catheter" in an article in 1929, although in a later paper stated he had developed it in 1927 1,2. It was originally introduced as a way of controlling perioperative and postoperative haemorrhage during and after a cystoscopic prostatectomy. He continued to refine it and in an article in 1937 described his improved "self-retaining bag catheter" 2."
"ureteric placement (rare)increased risk in the neurogenic bladder, long-term catheterisation, intra-operative placement, undistended bladder or non-routine catheterisation (e.g. during guide-wire assisted insertion (Blitz technique) or micro-tip catheter insertion during cystometry) 5"