CPT® Code 94617

Exercise test for bronchospasm, including pre- and post-spirometry and pulse oximetry; with electrocardiographic recording(s)

The CPT® Code 94617 refers to an exercise test specifically designed to evaluate bronchospasm, which is a condition characterized by the tightening of the muscles lining the airways, leading to reduced airflow and gas exchange. This test is crucial for diagnosing exercise-induced bronchospasm (EIB), a phenomenon that can occur when individuals engage in physical activity. During the test, a comprehensive assessment of lung function is conducted, which includes pre- and post-spirometry measurements as well as pulse oximetry monitoring. The spirometry tests measure the forced expiratory volume in one second (FEV1), providing baseline data on the patient's lung function before exercise begins. The test also incorporates electrocardiographic recordings to monitor the patient's heart rate and detect any arrhythmias that may arise during the exercise. Patients typically perform the exercise on a treadmill or stationary bicycle, wearing a nose clip to ensure that breathing is solely through the mouth. The goal is to achieve and maintain a heart rate exceeding 90% of the patient's peak heart rate for a duration of six minutes, while also ensuring that the breathing rate exceeds 85% of the maximum voluntary ventilation. Following the exercise, spirometry is repeated to assess any changes in lung function, with evaluations continuing for up to 30 minutes post-exercise. The results of this test can indicate varying degrees of bronchospasm, classified as mild, moderate, or severe based on the percentage increase in FEV1 from the baseline measurement.