A nephrostomy tube is a small and thin tube made of plastic that passes through the back, the skin, then in the kidney where the urine is stored. The primary purpose of the nephrostomy tube is to drain the urine. This enables the kidney to work normally and prevents damage to the organ. Thus it clears away any infection. The nephrostomy is an opening found between the skin and kidney.
Urine is created in the kidneys, and humans contain two kidneys. The urine passes to the bladder through the ureter. X-ray images and ultrasound are utilized to facilitate the process. Contrast is infused into the portion of the kidney that gathers the urine.