A nephrostomy tube is a narrow tube which is placed into your kidney.
It is inserted to drain urine which has been trapped in the kidney by an obstruction or narrowing in the tube (ureter) that would normally drain urine into the bladder.
You can have a nephrostomy tube in the left, right or both kidneys. The tube is stitched in and covered with a drain guard dressing on your lower back.
This is then attached to connection tubing which attaches to a drainage bag on your leg.