What instrument is used to extend the arteriotomy during a carotid endarterectomy?

The instrument used to extend the arteriotomy during a carotid endarterectomy is the Potts Smith scissors. This particular type of scissors is designed with a curved blade that allows for a controlled and precise extension of the incision in vascular procedures. When performing an arteriotomy, it is crucial to maintain a clean and smooth edge to minimize complications and ensure optimal blood flow post-surgery.

The curved design of Potts Smith scissors facilitates this extension without damaging surrounding tissues, which is essential for maintaining the integrity of the vessel and preventing excessive trauma. Their specific structure and intended use make them a preferred choice over other instruments for this particular task in the context of carotid endarterectomy.

While scalpels are used for initial incisions, their cutting ability does not provide the same control for extending the arteriotomy, making them less suitable for this purpose. Metzenbaum scissors, although useful in other surgical contexts for cutting soft tissues, are not specifically designed for vascular procedures, and ligation clamps serve a very different function of occluding vessels rather than facilitating incision extension.