How to choose the right duplex ultrasound probe
Check out this article on duplex ultrasound probes for arterial studies in patients with peripheral arterial disease!
Editors:Shelley Jacobs, PhD
Peer reviewers:Franz Wiesbauer, MD MPH Internist
Last update26th Feb 2021
Typically, a duplex ultrasound machine has two probes:
- A 12–18 MHz linear probe
- A 5–6 MHz curved probe
Figure 1. A duplex ultrasound machine has a 12–18 MHz linear probe and a 5–6 MHz curved probe.
The curved probe uses lower frequencies to see deeper vessels, whereas the linear probe uses higher frequencies to see more superficial vessels. The difference between the probes is just the depth of penetration.
The 12–18 MHz linear probe
Most peripheral arterial studies are performed with the linear probe because most of the lower extremity vessels are typically superficial.
The 5–6 MHz curved probe
The curved probe is usually reserved for deep abdominal arteries. However, it can be used in obese or swollen lower extremities where there is increased vessel depth.
It’s really that simple!
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Recommended reading
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About the author
Elizabeth Tenny, BS RVT RDCS
Elizabeth is a Senior Vascular Sonographer at Stanford University’s hospital in Stanford, California.