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Official Description

Pyelotomy; with drainage, pyelostomy

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

A pyelotomy is a surgical procedure that involves making an incision into the renal pelvis, which is the central cavity of the kidney responsible for collecting urine from the calyces. This procedure is typically performed when there is a need to access the renal pelvis for diagnostic or therapeutic purposes. The renal pelvis serves as a conduit for urine, allowing it to flow from the kidney into the ureter. During a pyelotomy, a skin incision is made over the kidney, followed by the incision of Gerota's fascia and dissection of the perirenal fat to expose the kidney. Surgeons carefully identify and control blood vessels by placing loops around them to prevent excessive bleeding. The kidney and ureter are then examined visually, and the ureter is traced to the ureteropelvic junction (UPJ) to locate the renal pelvis. Once the posterior aspect of the renal pelvis is accessed, it is incised to allow for further exploration or intervention. In the case of CPT® Code 50125, a pyelostomy tube is placed into the renal pelvis to facilitate urine drainage, and a purse-string suture is used to secure the tube in place. The surgical site is then closed in layers around the tube, and a pyelostomy bag is attached to collect the urine. This procedure is essential for managing conditions that may obstruct urine flow or require drainage of the renal pelvis.

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