How to choose the right duplex ultrasound probe
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!
- Aboyans, V, Criqui, MH, Abraham, P, et al. 2012. Measurement and interpretation of the ankle-brachial index: a scientific statement from the American Heart Association. Circulation. 126: 2890–2909. PMID: 23159553
- Cervin, A, Wanhainen, A, and Björck, M. 2020. Popliteal aneurysms are common among men with screening detected abdominal aortic aneurysms, and prevalence correlates with the diameters of the common iliac arteries. Eur J Vasc Endovasc Surg. 59: 67–72. PMID: 31757587
- Cleveland Clinic. 2021. Leg and foot ulcers. Cleveland Clinic. https://my.clevelandclinic.org
- Cleveland Clinic. 2021. Marfan syndrome. Cleveland Clinic. https://my.clevelandclinic.org
- Cleveland Clinic. 2021. Popliteal artery entrapment syndrome (PAES). Cleveland Clinic. https://my.clevelandclinic.org
- Cleveland Clinic. 2021. Statin medications & heart disease. Cleveland Clinic. https://my.clevelandclinic.org
- Collins, L and Seraj, S. 2010. Diagnosis and treatment of venous ulcers. Am Fam Physician. 81: 989–996. PMID: 20387775
- Høyer, C, Sandermann, J, and Peterson, LJ. 2013. The toe-brachial index in the diagnosis of peripheral arterial disease. J Vasc Surg. 58: 231–238. PMID: 23688630
- Jaoude, WA. 2010. Management of popliteal artery aneurysms. SUNY Downstate Department of Surgery. http://www.downstatesurgery.org
- Johns Hopkins Medicine. 2021. Aneurysm. Johns Hopkins Medicine. https://www.hopkinsmedicine.org
- Kassem, MM and Gonzalez, L. 2020. “Popliteal artery aneurysm”. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing. https://www.ncbi.nlm.nih.gov
- Moxon, JV, Parr, A, Emeto, TI, et al. 2010. Diagnosis and monitoring of abdominal aortic aneurysm: current status and future prospects. Curr Probl Cardiol. 35: 512–548. PMID: 20932435
- Richert, DL. 2016. Gundersen/Lutheran Ultrasound Department Policy and Procedure Manual. Gundersen Health System. https://www.gundersenhealth.org
- Rivera, PA and Dattilo, JB. 2020. “Pseudoaneurysm”. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing. https://www.ncbi.nlm.nih.gov
- Stanford Medicine 25. 2021. Measuring and understanding the ankle brachial index (ABI). Stanford Medicine 25. https://stanfordmedicine25.stanford.edu/
- Teo, KK. 2019. Acute peripheral arterial occlusion. Merck Manuals Professional Edition. https://www.merckmanuals.com
- The Regents of the University of California. 2020. Diabetic foot ulcers. UCSF Department of Surgery. https://surgery.ucsf.edu
- Zwiebel, WJ and Pellerito, JS. 2005. Introduction to Vascular Ultrasonography. 5th edition. Philadelphia: Elsevier Saunders. (Zwiebel and Pellerito 2005, 254–259)