What is difference between foley and straight catheter and why do you use each one?

A foley catheter is more flexible and is meant for longer term use. There is a baloon at the end which, when inflated, allows the tube to remain in the bladder. A straight cath is a quick, "in and out", bladder catheterization. An indwelling foley is left in place for people who are not physically able to use the toilet or need their urine output strictly monitored. A straight cath may be used for individuals who have chronic ballder problems and are able to perform the catheterization themselves or for those people who you will only need to perform the procedure once on.