Understanding the Adductor Canal and its Role in Pain Management

The adductor canal, also known as Hunter's canal, is an intermuscular pathway located in the thigh, housing the saphenous nerve and vascular structures vital for regional anesthesia techniques.

An adductor canal block (ACB) is a peripheral nerve block aimed at anesthetizing the saphenous nerve. It preserves quadriceps muscle strength, offering a safer alternative to femoral nerve blocks post knee surgery.

Ultrasound-guided ACB has gained popularity for its precision. The clinician visualizes the saphenous nerve and injects local anesthetic, minimizing complications and improving block success rates.

ACB is highly effective for managing postoperative pain, particularly after knee arthroplasty. It contributes to reduced opioid consumption and expedited functional recovery, enhancing patient outcomes.

A continuous ACB involves placing a catheter to provide ongoing pain relief. This technique allows for prolonged analgesia, which is especially beneficial during the active rehabilitation phase post knee surgery.

ACB is a safer option for anticoagulated patients compared to neuraxial blocks. It presents a lower risk of bleeding complications, offering an effective pain management solution without disrupting anticoagulation therapy.

While ACB is advantageous, it's not completely without risks. Inadequate analgesia for certain surgeries and potential for local anesthetic systemic toxicity must be considered when choosing ACB.