The difference between medical gauze and medical bandage

Usually the gauze is sterile, (both are sterilized by the hospital).

There are many places to use, such as the incision of the incision and the wound covered with sterile gauze, the most of the small wound in the hospital stitches, the direct use of the gauze to wipe blood 

The bandage is a long roll commonly used in fracture splint, gesso fixed.

Fixed the fracture wound up after put the bandage, outside or doing condole belt , not used in sterile wound, of course, can also be sterile, used to clean sterile wound but no such use, it determines the shape of  it's purposes