CPT® Code 0496T

Add-On Code

1. Indications

The procedure associated with CPT® Code 0496T is indicated for the assessment and monitoring of marginal (extended) cadaver donor lung(s) during the ex vivo lung perfusion (EVLP) process. This procedure is typically performed in the following scenarios:

• Assessment of Lung Viability The procedure is indicated when there is a need to evaluate the viability of cadaver donor lung(s) for potential transplantation.
• Monitoring During EVLP It is performed to monitor the physiological parameters of the lung(s) during the EVLP process, ensuring that the lungs are functioning adequately for transplantation.
• Evaluation of Gas Exchange The procedure is indicated for evaluating gas exchange capabilities through arterial blood gases (ABGs) to determine the effectiveness of lung perfusion.

2. Procedure

The procedure for CPT® Code 0496T involves several critical steps to ensure the proper monitoring of cadaver donor lung(s) during the ex vivo lung perfusion (EVLP) process. The following steps outline the detailed procedural process:

• Step 1: Cannulation The procedure begins with the cannulation of the main pulmonary artery and the left atrial cuff. This step is essential for establishing a connection to the EVLP system, allowing for the perfusion of the lung(s).
• Step 2: Establishing Perfusion and Ventilation After cannulation, the lung(s) are perfused, and endotracheal intubation is performed to initiate ventilation. This step is crucial for maintaining oxygenation and ensuring that the lungs are adequately ventilated during the monitoring phase.
• Step 3: Monitoring Gas Exchange Once ventilation is established, gas exchange is evaluated using arterial blood gases (ABGs) obtained from the perfusate fluid at the left atrial cannula and each pulmonary vein. The lungs are ventilated with 100% oxygen for five minutes to facilitate accurate gas exchange analysis.
• Step 4: Bronchoscopy Flexible bronchoscopy is performed to inspect the large airways for any abnormalities. This step allows for direct visualization of the airways and helps identify any potential issues that may affect lung viability.
• Step 5: Repeated Evaluations Bronchoscopy and ABGs are repeated every hour, along with visual and manual examinations to evaluate for atelectasis, consolidation, and pulmonary edema. This ongoing assessment is vital for monitoring the condition of the lung(s) throughout the procedure.
• Step 6: Pulmonary Recruitment Test Every 30 minutes, a pulmonary recruitment test is performed by increasing the ventilator's tidal volume and inspiratory hold settings. This test helps to assess the lung's ability to expand and function properly.
• Step 7: Lung Deflation Test A lung deflation test is conducted at the start of ventilation and every hour thereafter to evaluate lung compliance. This test is essential for determining the mechanical properties of the lung(s).
• Step 8: Evaluation of Contralateral Lung In cases where one lung is determined to be non-viable during the EVLP, perfusion of the contralateral lung continues to assess its viability independently. This step ensures that the potential for transplantation is maximized.

3. Post-Procedure

Post-procedure care following the monitoring of cadaver donor lung(s) involves continued assessment of lung viability and function. It is essential to maintain close observation of the lungs to ensure that they remain suitable for transplantation. Any findings from the monitoring process, including results from bronchoscopy and ABGs, should be documented thoroughly. Additionally, if any complications arise during the monitoring phase, appropriate interventions should be initiated promptly. The overall goal of post-procedure care is to ensure that the lungs are adequately prepared for transplantation, maximizing the chances of a successful outcome for the recipient.