What frequency probe is most likely to be used intraoperatively during a carotid endarterectomy?

During a carotid endarterectomy, which is a surgical procedure aimed at reducing the risk of stroke by correcting stenosis in the common carotid artery, the choice of ultrasound frequency is crucial. A 12 MHz probe is commonly used intraoperatively for several reasons related to the specific requirements of the procedure.

Higher frequency probes, such as the 12 MHz, provide better resolution of superficial structures, which is essential during surgery to accurately assess the carotid artery and any plaque or thrombus present. This high-resolution imaging allows for more precise evaluations of blood flow and anatomical details, aiding surgeons in real-time decision-making.

Probes with lower frequencies, such as 5 MHz, while beneficial for deeper structures due to their greater penetration, do not offer the same clarity or detail needed for assessing the carotid artery's condition during surgery. Frequencies like 10 MHz or 15 MHz may also be used, but the 12 MHz is often the optimal choice as it balances a good level of detail with sufficient penetration.

Thus, the use of a 12 MHz probe intraoperatively during a carotid endarterectomy is preferred for its superior imaging capabilities, facilitating a more effective and safer surgical procedure.