Femoral Triangle Block With Popliteal Plexus Block Versus Femoral Triangle Block Versus Adductor Canal Block for TKA

Total volumes of Marcain differs in each arm, depending on which nerve blocks the patients is randomized to receive. Sham block does not include injection of placebo saline, due to the risk of hydrodissection between the anatomical sections which may erase the isolation of the different nerve blocks. Instead the sham block include imitation of the real nerve block, including correct placement of the needle on the target for the block.