Colour Doppler Test

What is a Colour Doppler Test?

The colour Doppler test is a diagnostic technique that employs sound waves to measure blood flow and motion within blood vessels. During the test, a handheld probe (transducer) is applied to the skin, sending and receiving sound waves that measure the movement of red blood cells. A computer then converts these sound waves into colour images representing blood flow.

Different colours are used to signify the direction and speed of blood flow. Red indicates blood flowing towards the transducer, blue represents blood flowing away from it, and green or yellow typically indicates areas of high-flow turbulence. This non-invasive test provides valuable information about the blood flow in various parts of the body without the need for injecting any dyes, making it a safe and convenient diagnostic tool.

How to Prepare for the Colour Doppler Test?

Dos:

• Wear loose, comfortable clothing that allows easy access to the area being examined.
• Follow any specific instructions provided by your doctor or the diagnostic centre regarding fasting or medication.
• Inform your doctor about any medications you are currently taking, as some may need to be temporarily stopped before the test.
• Arrive at the colour Doppler test lab on time for your scheduled appointment.

Don'ts:

• Do not apply any lotions, creams, or powders to the skin in the area being examined, as they may interfere with the colour Doppler test.
• Avoid smoking or consuming caffeine for at least 2 hours before the test, as they can affect blood flow.
• Do not engage in strenuous physical activities or exercise right before the test, as it may alter the blood flow patterns.

Why is a Colour Doppler Test Recommended?

The colour Doppler test is commonly recommended  for various conditions, including:

• Diagnosing blood clots or blockages in blood vessels, such as deep vein thrombosis (DVT) and peripheral arterial disease (PAD)
• Monitoring blood flow after surgery or in patients with suspected heart disease
• Evaluating blood flow in the heart, such as in echocardiograms
• Examining blood flow in the neck and brain to help diagnose stroke-related conditions
• Monitoring blood flow in pregnant women and their unborn babies
• Assessing blood flow to organs in the abdomen