Indirect block technique of the adductor canal using anatomical landmarks

Abstract

The adductor canal block can be performed for knee analgesia and is an anesthetic technique focusing on the saphenous nerve, usually performed with ultrasound assistance, aiming to improve accuracy and avoid neurovascular injury. Challenges in performing this block with ultrasound include the availability of an ultrasound machine in the perioperative setting and trained professionals. The objective is to describe a technique for the indirect block of the adductor canal guided by anatomical landmarks without ultrasound assistance. The technique involves locating anatomical landmarks such as the patella, adductor tubercle, and greater trochanter for
blocking the adductor canal. The described technique enables the indirect block of the adductor canal without ultrasound assistance, to be performed by the surgeon or other surgical team members, such as the assisting surgeon and anesthetist in the perioperative period, including the intraoperative phase, just before the surgical incision.