 One catheter is inserted in the short-axis plane of the adductor canal using an in plane technique. The second catheter is inserted in the long-axis plane using a dynamic combination of in plane and out of plane techniques. 10ml of normal saline is used for hydro dissection in both catheters. When the catheters are in place 15 mL of LA lidocaine 10mgml is injected in each catheter. Distance from catheter orifice to artery is noted in the short axis group and distance from catheter orifice to fascia penetration is noted in the long axis group. After injection, the catheters are fixated to the skin with dressings. 