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What is the accuracy for doppler ultrasound to find blood clots?

3 doctors weighed in
Dr. David Brouwer
Internal Medicine
2 doctors agree

In brief: Leg ultrasound

Ultrasound is usually effective at detecting a blood clot in the leg vein, however there are times when a clot below the knee level may not be adequately detected.
In that situation, a repeat ultrasound a few days later can be performed. Other factors may lower the sensitivity of the test, such as the experience of the ultrasound tech, the radiologist reading the images, and the size of the leg.

In brief: Leg ultrasound

Ultrasound is usually effective at detecting a blood clot in the leg vein, however there are times when a clot below the knee level may not be adequately detected.
In that situation, a repeat ultrasound a few days later can be performed. Other factors may lower the sensitivity of the test, such as the experience of the ultrasound tech, the radiologist reading the images, and the size of the leg.
Dr. David Brouwer
Dr. David Brouwer
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