Sonography for Saphenous Nerve Block Near the Adductor Canal

The Effects of Ultrasound-Guided Adductor Canal Block Versus Femoral Nerve Block on Quadriceps Strength and Fall Risk

“…15 However, controversy exists as to the optimal level on the thigh at which to perform the ACB. Whereas some clinicians advocate for a distal approach (eg, distal third of the femur), 16 our clinical experience has been that an approach at midfemur does not impair motor function, a result that is reproduced in this volunteer study. In addition, a midfemoral site may more reliably ensure a block proximal to the branching of the infrapatellar branch of the saphenous nerve, potentially leading to a more complete block of the knee.…”

Effect of Nerve Stimulation Use on the Success Rate of Ultrasound-Guided Subsartorial Saphenous Nerve Block

“…[6][7][8][9] Various US-guided approaches to saphenous nerve blockade have been reported. 4,7,[10][11][12][13] Among these, the subsartorial approach, described in a cadaveric study by Horn et al 8 and performed prone, offers the advantage of avoiding patient repositioning and redraping when added to a prone (posterior) popliteal sciatic nerve block to achieve surgical anesthesia of the foot and ankle. With the use of US guidance for this approach, the saphenous nerve is localized in the vastoadductor membrane deep to the sartorius muscle and adjacent to the saphenous branch of the descending genicular artery, approximately 5 to 7 cm above the popliteal crease.…”

Anatomic Basis to the Ultrasound-Guided Approach for Saphenous Nerve Blockade

“…Lundblad et al 11 reported a US method to identify the saphenous nerve and its infrapatellar branch. Krombach and Gray 12 published a letter describing the use of US to block the saphenous nerve at the vastoadductor membrane more proximally, providing insight for our technique.…”