The study design will have two comparative arms; in both arms we use the same local anesthetic which is Bupivacaine 0.25% with epinephrine; in all cases a total of 15 ml will be injected around the femoral nerve. Once identified with ultrasound 5 ml will be injected at lateral, medial and posterior aspect of the nerve. The experimental arm, will receive a FNB using an echogenic needle; and the control group will receive a FNB using standard of care needles.