Retrobulbar catheter anesthesia as a routine technique for retinal and vitreoretinal surgery

To ascertain the safety of the retrobulbar catheter technique for intraoperative local anesthesia and titratable postoperative analgesia, 1,423 consecutive retinal or vitreoretinal surgeries were reviewed. Using a commercially available retrobulbar needle, a 28-gauge flexible catheter was introduced into the retrobulbar space before surgery and was removed the next morning. When pain occurred, a local anesthetic was re-injected intraoperatively or postoperatively through the catheter. None of the patients had intraoperative or postoperative complications. The retrobulbar catheter anesthesia may be a relatively safe procedure for prolonged intraoperative anesthesia and titratable postoperative analgesia in retinal and vitreoretinal surgery.