An endoscopic instrument for examining the inside of the kidney (see KIDNEYS). It is normally passed into the renal pelvis of the organ via a route from the surface of the skin. Instruments can be passed through the nephroscope under direct vision to remove CALCULI (stones) or break them up using ULTRASOUND.
n. an instrument (*endoscope) used for examining the interior of the kidney, usually passed into the renal pelvis through a track from the skin surface after needle *nephrostomy and dilatation of the tract over a guidewire. The nephroscope allows the passage of instruments under direct vision to remove calculi (see percutaneous nephrolithotomy), or to disintegrate them using ultrasound probes or pneumatic energy via a lithoclast, or a combination of the two.
n. drainage of urine from the kidney by a tube (catheter) passing through the kidney into the renal pelvis via the skin surface. The procedure is performed by a urologist or an interventional radiologist, often under ultrasound guidance. This is commonly used as a temporary procedure to alleviate renal obstruction. Long-term urine drainage by nephrostomy may be complicated by the attendant problems of infection and obstruction of the catheter by debris. Nephrostomy is also performed to enable the passage of a *nephroscope.... nephrostomy