Why might a sonographer choose to perform Doppler ultrasound on peripheral arteries?

• A. To assess gas exchange in the lungs
• B. To evaluate blood flow and detect blockages
• C. To measure cardiac output
• D. To determine blood glucose levels

Answer: (B)

Performing Doppler ultrasound on peripheral arteries primarily serves to evaluate blood flow and detect blockages. Doppler ultrasound is a specialized technique that utilizes sound waves to measure the speed and direction of blood flow within blood vessels. By assessing the Doppler signals, sonographers can identify abnormal changes in blood flow patterns, which may indicate conditions such as stenosis (narrowing of the arteries), occlusions (blockages), or other vascular diseases.

This application is crucial in the diagnosis and management of peripheral arterial disease, where reduced blood flow can lead to significant complications. The information gained from Doppler ultrasound helps healthcare providers make informed decisions regarding treatment options for their patients.

The other choices mentioned do not relate to the primary function of Doppler ultrasound in this context; rather, they pertain to different medical assessments and diagnostics, such as lung function, cardiac output, and blood glucose monitoring. Thus, the focus on blood flow evaluation and blockage detection underscores the significance of Doppler ultrasound in vascular assessments.