4327 Scientific abstract: Acute pain Functional outcome and postoperative analgesia following total knee arthroplasty: randomized doubleblind comparison between continuous adductor canal block and preoperative radiofrequency of saphenous and genicular nerves Juan-Francisco Asenjo, Maria Fernanda Arboleda, Giuliano Michelagnoli, Fardin Yousefshahi, Juan Pineda, Jose Andres Correa, Eric Lenczner,...

BACKGROUND AND OBJECTIVES Successful blockade of the saphenous nerve using surface landmarks can be challenging. We evaluated the anatomic basis of performing a saphenous nerve block with ultrasound (US) using its relationship to the saphenous branch of descending genicular artery, sartorius muscle, and the adductor hiatus as defined by cadaveric measurements. METHODS Using a total of 9 cadav...

The adductor canal block (ACB) is newer compartment block of the saphenous nerve, which is a branch of femoral nerve, performed at the level of lower third of the thigh so that much of the motor innervation of the quadriceps group is spared, thus preserving much of the quadriceps strength making early ambulation and rehabilitation safer. The most significant advantage of the ACB over femoral ne...

BACKGROUND In this proof-of-concept study, we investigated the effect of the predominantly sensory adductor-canal-blockade on established pain in the early post-operative period after total knee arthroplasty (TKA). We hypothesised that the adductor-canal-blockade would reduce pain during flexion of the knee (primary end point) and at rest, as well as reducing morphine consumption and morphine-r...

Background and purpose - The additional effects of a continuous adductor canal block (ACB) compared with a single-dose local infiltration anesthesia (LIA) after total knee arthroplasty (TKA) has not been widely researched. Both methods have good effect individually. We hypothesized that a continuous ACB added to a single-dose LIA would lower pain scores while ambulating on postoperative day 1 (...