JOSH SHER / SCIENCE PHOTO LIBRARY JOSH SHER / SCIENCE PHOTO LIBRARY
Bladder X-ray examination. Pelvic X-ray showing a catheter being passed into the bladder of a female patient (seen in the background). The catheter, a flexible tube, can be seen running down to lower centre on the X-ray, where it is curling back on itself inside the bladder. Catheters are mainly used to introduce fluids, such as X-ray opaque dyes, or to drain off or sample fluids.
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