 Purpose Hypothesis This clinical study is a prospective, controlled, randomized, single-blinded trial designed to investigate the hypothesis that ultrasound-guided blockade of the saphenous nerve in conjunction with nerve stimulation has a higher success rate when compared to ultrasound alone. These research interventions represent what is considered to be an improvement on the standard practice at St. Pauls, which is to block the saphenous nerve with one of any number of saphenous nerve blocks, using a number of different techniques i.e. ultrasound-guided, nerve stimulation, blind field block; the effectiveness of which has been inconsistent. The purpose of this study is to identify if one technique has a great success rate over another, which would ultimately result in increased success rates of saphenous nerve blocks and patient care. 