CPT® Code 37145

1. Indications

The open renoportal venous anastomosis procedure is indicated for specific clinical conditions where there is a need to redirect blood flow between the portal and renal venous systems. The following are the primary indications for performing this procedure:

• Portal Hypertension - This condition involves increased blood pressure in the portal venous system, which can lead to complications such as variceal bleeding or ascites.
• Renal Vein Thrombosis - The procedure may be indicated in cases where there is a blockage in the renal vein, necessitating an alternative route for blood flow.
• Hepatic Dysfunction - Patients with liver disease may require this procedure to manage complications arising from impaired liver function.

2. Procedure

The open renoportal venous anastomosis procedure involves several critical steps to ensure successful completion. The following outlines the procedural steps as described:

• Step 1: Incision - The surgeon begins by making an incision in the abdomen to gain access to the necessary anatomical structures. This incision is typically made in the upper abdominal region to facilitate the subsequent steps of the procedure.
• Step 2: Identification of the Hepatoduodenal Ligament - Once the incision is made, the surgeon identifies the hepatoduodenal ligament, which is crucial for exposing the portal vein. This ligament serves as a landmark during the procedure.
• Step 3: Exposure of the Portal Vein - The portal vein is then exposed, extending from the hilum of the liver to the pancreas. This exposure is essential for the anastomosis to be performed accurately.
• Step 4: Division of Branches (if necessary) - If additional exposure of the portal vein is required, the surgeon may divide the gastroduodenal and right gastric branches. This step is performed to ensure adequate access to the portal vein for the anastomosis.
• Step 5: Exposure of the Renal Vein - The selected renal vein is then carefully exposed. This step is critical as it prepares the site for the anastomosis with the portal vein.
• Step 6: Anastomosis - Finally, the portal vein is anastomosed to the renal vein. This connection is established to create a new pathway for blood flow, effectively completing the renoportal shunt.

3. Post-Procedure

After the completion of the open renoportal venous anastomosis, patients typically require careful monitoring and post-operative care. This may include observation for any signs of complications such as bleeding or infection at the surgical site. Additionally, patients may need to be monitored for changes in renal function and portal pressure. Recovery time can vary based on the individual patient's health status and the complexity of the procedure. Follow-up appointments are essential to assess the success of the anastomosis and to manage any potential complications that may arise in the post-operative period.