Assessment of The Addition of Epinephrine to Intra-articular Bupivacaine for the Control of Acute Pain in Patients underwent to Anterior Cruciate Ligament Reconstruction.

 To evaluate postoperative pain, using the visual analog scale (VAS), in patients undergoing anterior cruciate ligament reconstruction (ACLR) and receiving intra-articular anesthetic solutions.  The present is a randomized clinical trial with a sample of 48 patients divided into 4 groups: Group I (n = 12) - 20 mL of saline solution (control); Group II (n = 12) - 20 mL of 0.5% bupivacaine; Group III (n = 12) - 20 mL of 0.