* Adductor canal nerve block (saphenous nerve) does not cover the posterior portion of the knee. So an injection in the posteromedial knee during arthroscopy can cover the tibial nerve and provide pain control for the posterior knee. | * Adductor canal nerve block (saphenous nerve) does not cover the posterior portion of the knee. So an injection in the posteromedial knee during arthroscopy can cover the tibial nerve and provide pain control for the posterior knee. |