 Study Treatment Group 2 - Saphenous nerve blockade using ultrasound guidance and nerve stimulation The needle will be place with the needle tip in close proximity 1-2 mm of the target structure the saphenous nerve if visible or in the subsartorial fascial plane if the nerve is not visible. The Pajunk MultiStim SENSOR nerve stimulator will then be turned on, starting at 1.0 milliamp mA until a tapping sensation is elicited in the medial or anterior aspect of the ankle. The amplitude of the nerve stimulator will then be gradually decreased with maintenance of the tapping sensation by making small adjustments in needle location. The end-point for nerve localization will be a tapping sensation in the area of the medial malleolus at 0.6 mA. The anesthesiologist will have a maximum search time of 5 minutes from needle entry to elicitation of the tapping sensation. Once a tapping sensation is elicited in the 0.6 mA range, 10 mL of 0.5 ropivacaine will be injected at the site. If a tapping sensation is elicited but not 0.6 mA within 5 minutes then 10 mL of 0.5 ropivacaine will be injected at the site where the lowest amplitude tapping sensation was elicited. If no tapping sensation is elicited from the subject after 5 minutes, an injection of 10 mL of ropivacaine will be made below the Sartorius muscle in the subsartorial fascial plane. Before injection of any local anesthetic a gentle aspiration will be preformed, with a second aspiration after 5 mL of ropivacaine has been injected. Once injection of local anesthetic has commenced small needle adjustments are allowed to enhance spread. This will be done at the discretion of the regional anesthesiologist performing the block. 