CPT® Code 50081

Percutaneous nephrolithotomy or pyelolithotomy, lithotripsy, stone extraction, antegrade ureteroscopy, antegrade stent placement and nephrostomy tube placement, when performed, including imaging guidance; complex (eg, stone[s] > 2 cm, branching stones, stones in multiple locations, ureter stones, complicated anatomy)

The procedure described by CPT® Code 50081 involves a complex percutaneous nephrolithotomy or pyelolithotomy, which is a minimally invasive surgical technique used to remove renal calculi (kidney stones) that are larger than 2 cm, branching, or located in multiple areas of the kidney or ureter. This procedure is performed under imaging guidance, typically fluoroscopy, to ensure accurate placement of instruments and to visualize the stones during removal. The process begins with the cleansing of the skin over the planned puncture site, followed by the administration of a local anesthetic to minimize discomfort. A needle is then inserted through the skin into the kidney, allowing for the advancement of a guidewire and the placement of a sheath. A nephroscope is introduced through this sheath to visualize the stones, which are subsequently fragmented using various lithotripsy techniques, including ultrasound, electrohydraulics, pneumatic lithotripsy, or laser. The fragments are carefully extracted using forceps or suction. Additionally, antegrade ureteroscopy is performed to ensure that no stone fragments remain in the ureter, and any identified stones or fragments are removed. The procedure concludes with the placement of a nephrostomy tube to facilitate drainage, and the patient's fluid status and lung condition are monitored to prevent complications such as hydrothorax or pneumothorax. This comprehensive approach is essential for effectively managing complex stone disease in the renal system.