Doppler Scan is also a form of Ultrasound Scan where the vascular integrity, structure and functional aspects are visualized and studied to assist the diagnosis and treatment. It has immense application in Cardiovascular and obstetrics evaluation.

By monitoring the rate of change in pitch, a Doppler ultrasound can measure how fast blood flows (frequency). This test could be used instead of more invasive procedures like angiography, which involves injecting dye into blood arteries to make them visible on X-ray imaging. Your doctor may use this test to check for artery damage or to monitor the effects of specific treatments on your veins and arteries. There are no known dangers associated with undergoing a Doppler ultrasonography.

You may need to do the following to prepare for a Doppler ultrasound:

• Remove all clothing and jewellery from the region that will be evaluated.
• For up to two hours before your test, stay away from cigarettes and other nicotine-containing items. Nicotine causes blood vessels to constrict, altering your results.
• You may be required to fast (not eat or drink) for several hours before certain types of Doppler tests.

If you need to do anything to prepare for your test, your doctor will let you know.