CPT® Code 0495T

1. Indications

The procedure associated with CPT® Code 0495T 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 performed to evaluate the viability of donor lungs prior to transplantation, particularly in cases where the lungs may be considered marginal due to various factors. The following conditions may warrant the initiation of this procedure:

• Marginal Lung Quality Lungs that may not meet standard criteria for transplantation due to factors such as age, smoking history, or previous lung disease.
• Assessment of Lung Function To determine the physiological status of the lungs through detailed monitoring of pulmonary parameters.
• Evaluation of Gas Exchange To assess the ability of the lungs to effectively exchange gases, which is critical for successful transplantation.

2. Procedure

The procedure for CPT® Code 0495T involves several critical steps to ensure the effective monitoring and assessment of cadaver donor lung(s) during the EVLP process. The following procedural steps are outlined:

• 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 lungs.
• Step 2: Establishing Perfusion and Ventilation Once cannulation is complete, perfusion of the lung(s) is initiated, and endotracheal intubation is performed to facilitate ventilation. The lungs are ventilated using 100% oxygen for a period of five minutes to optimize gas exchange conditions.
• Step 3: Physiological Monitoring Throughout the procedure, the physician or qualified health care professional conducts a series of physiological assessments. This includes monitoring pulmonary artery flow, pulmonary artery pressure, left atrial pressure, pulmonary vascular resistance, and various airway pressures, including mean, peak, and plateau pressures.
• Step 4: Gas Analysis The perfusate gas analysis is performed to evaluate the gas exchange capabilities of the lungs. Arterial blood gases (ABGs) are collected from the perfusate fluid at the left atrial cannula and each pulmonary vein to assess lung function.
• Step 5: Bronchoscopy Flexible bronchoscopy is performed to visually inspect the large airways for any signs of obstruction or pathology. This step is crucial for identifying potential issues that may affect lung viability.
• Step 6: Hourly Evaluations The physician conducts hourly evaluations, which include repeating bronchoscopy and ABG analysis. Visual and manual examinations are performed to check for atelectasis, consolidation, and pulmonary edema.
• Step 7: Pulmonary Recruitment Testing Every 30 minutes, a pulmonary recruitment test is conducted by increasing the ventilator's tidal volume and inspiratory hold settings to assess lung recruitment and compliance.
• Step 8: Lung Deflation Testing A lung deflation test is performed at the start of ventilation and every hour thereafter to evaluate lung compliance and overall function.
• Step 9: Viability Assessment If one lung is determined to be non-viable during the EVLP process, perfusion of the contralateral lung continues to assess its viability for potential transplantation.

3. Post-Procedure

Post-procedure care following the initiation and monitoring of the cadaver donor lung(s) organ perfusion system involves continued observation and assessment of the lungs' viability. The physician or qualified health care professional must remain vigilant for any signs of complications or changes in lung function. Continuous monitoring of physiological parameters is essential to ensure that the lungs remain suitable for transplantation. If both lungs are deemed viable, preparations for transplantation can proceed. If complications arise or if one lung is found to be non-viable, appropriate decisions regarding the use of the viable lung must be made in accordance with established protocols. Documentation of all assessments, evaluations, and findings during the procedure is critical for compliance and future reference.