CPT® Code 78585

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The CPT® Code 78585 refers to a specialized diagnostic procedure known as pulmonary perfusion imaging, which involves the use of radioactive particles to assess blood flow in the lungs. During this procedure, a physician administers radioactive particles that are intentionally designed to be too large to pass through the capillaries within the lung tissue. This characteristic allows for the visualization of blood flow patterns in the lungs using a specialized imaging camera. The accumulation of these particles in the lung areas is monitored, and any regions that do not exhibit a buildup may indicate potential issues with blood supply, such as pulmonary embolism or other vascular abnormalities. Additionally, the procedure includes a ventilation assessment where the patient inhales radioactive Xenon gas and retains it in the lungs for as long as possible. This step is crucial for identifying areas of the lungs that may not be receiving adequate ventilation. Furthermore, the imaging process incorporates a washout phase, where an image is captured as the patient exhales, allowing for the detection of any particles that may become trapped in the airways, which could suggest the presence of an airway obstruction. Overall, this comprehensive imaging technique provides valuable insights into both the perfusion and ventilation status of the lungs, aiding in the diagnosis of various pulmonary conditions.