CPT® Code 93978

A duplex scan of the aorta, inferior vena cava, iliac vasculature, or bypass grafts is a comprehensive vascular ultrasound study designed to assess the structure and function of these critical blood vessels. This procedure employs both B-mode imaging and Doppler ultrasound techniques to provide a detailed evaluation of blood flow and vascular health. During the examination, a clear gel is applied to the skin over the area of interest to facilitate the transmission of sound waves. A B-mode transducer is then placed on the skin, generating real-time images of the arteries and veins. The Doppler component of the transducer is crucial as it measures the velocity and direction of blood flow within these vessels. The B-mode imaging utilizes ultrasonic sound waves that penetrate the skin and reflect off the blood vessels, allowing for visualization of their anatomy. Meanwhile, the Doppler probe detects sound waves that bounce off moving blood cells, converting these reflections into audible sounds. Changes in the pitch of these sounds can indicate variations in blood flow, such as reductions or complete obstructions. The data collected during the scan is processed by a computer, which produces color-enhanced video images that illustrate the speed and direction of blood flow, as well as any potential blockages. Additionally, spectral Doppler analysis is performed to assess anatomical details and hemodynamic function, providing insights into conditions like narrowing or plaque buildup in the blood vessels. Following the procedure, the physician interprets the findings and documents them in a written report, ensuring that the results are communicated effectively for further clinical decision-making.