CPT® Code 35485

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1. Indications

The procedure described by CPT® Code 35485 is indicated for patients experiencing occlusions in the tibioperoneal trunk and its branches. These occlusions may be due to atherosclerosis or other vascular diseases that impede blood flow to the lower extremities. The primary indications for performing this procedure include:

• Peripheral Artery Disease (PAD) - A condition characterized by narrowed arteries reducing blood flow to the limbs, often leading to pain and mobility issues.
• Critical Limb Ischemia - A severe obstruction of the arteries that significantly reduces blood flow, potentially leading to tissue loss or amputation if not treated.
• Intermittent Claudication - Pain or cramping in the legs or buttocks during physical activities, which is relieved by rest, indicating compromised blood flow.

2. Procedure

The procedure for CPT® Code 35485 involves several critical steps to ensure effective treatment of the occluded artery. The steps are as follows:

• Step 1: Preparation and Access - The skin over the access artery is thoroughly prepped and incised to allow for direct access to the artery. This initial step is crucial for ensuring a sterile environment and minimizing the risk of infection.
• Step 2: Artery Exposure - Once the skin is incised, the underlying artery is carefully exposed. This exposure is necessary to facilitate the subsequent steps of the procedure.
• Step 3: Sheath Placement - A small nick is made in the artery, and a sheath is placed within the artery. The sheath serves as a conduit for the introduction of other instruments needed for the procedure.
• Step 4: Guidewire Insertion - A guidewire is inserted through the sheath and advanced from the access artery to the site of the occlusion. The guidewire is essential for guiding the atherectomy catheter to the blockage.
• Step 5: Atherectomy Catheter Advancement - The atherectomy catheter is then advanced over the guidewire. Once in position, the guidewire is withdrawn, allowing the atherectomy device to operate directly on the occlusion.
• Step 6: Atherectomy Procedure - The atherectomy is performed using a specialized balloon catheter that features a cutting piston. This piston is advanced through a window on the catheter, effectively shaving plaque from the arterial wall. The plaque is collected in the device as it is removed from the artery.
• Step 7: Multiple Passes - The physician may make several passes with the atherectomy device to ensure that the desired results are achieved, effectively clearing the blockage.
• Step 8: Guidewire Exchange - After the atherectomy is completed, the atherectomy device is exchanged for a guidewire to facilitate the next steps.
• Step 9: Angiography Catheter Advancement - An angiography catheter is advanced over the guidewire, and the guidewire is withdrawn. This step is critical for assessing the success of the procedure.
• Step 10: Completion Angiography - Contrast material is injected through the angiography catheter, and a completion angiography is performed to ensure that the vessel is patent and that blood flow has been restored.
• Step 11: Withdrawal and Closure - The angiography catheter is withdrawn, and the access artery is repaired. Finally, the skin incision is closed, completing the procedure.

3. Post-Procedure

Post-procedure care following the transluminal peripheral atherectomy involves monitoring the patient for any complications and ensuring proper recovery. Patients may be observed for signs of bleeding or infection at the incision site. Additionally, follow-up imaging may be required to confirm the success of the procedure and the patency of the artery. Patients are typically advised on activity restrictions and may be prescribed medications to manage any underlying conditions, such as antiplatelet agents to prevent clot formation. The healthcare team will provide specific instructions regarding wound care and any necessary follow-up appointments to monitor the patient's recovery and vascular health.