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Often anterior cruciate ligament (ACL) reconstruction is performed as outpatient surgery. This requires a patient friendly postoperative pain management. Three common procedures were compared in this trial.In a prospective, randomized study the effect of postoperative pain management using preoperative intraarticular anesthesia (0.1 mg Fentanyl + 8 ml Bupivacain 0.5%) was compared with postoperative intraarticular anesthesia (0.1 mg Fentanyl + 8 ml Bupivacain 0.5%) and the femoralis 3-in-1 nerve block (20 ml Prilocain 1% + 20 ml Bupivacain 0.5%) in 157 patients who underwent arthroscopic ACL-plasty.Preoperative intraarticular anesthesia and the femoralis 3-in-1 nerve block showed the same postoperative analgesia and satisfactory pain scores in most cases. Postoperative intraarticular anesthesia was less effective.Our data show that in anterior cruciate ligament reconstruction preoperative intraarticular analgesia with Bupivacain/Fentanyl is satisfactory and equal to the femoralis 3-in-1 nerve block with Bupivacain.