The world day of "live surgery" was organized by LION on 10th of December and was totally aimed at cochlear implants. The ENT specialists from 7 European Department, including Poznan, have been participated. We have shown a surgery of hybrid implant in 38 years old woman with bilateral high frequency hearing loss. The whole surgery has been completed without complications. The intraoperative measurements were conducted with good results. A hot discussion with session moderators (coordinators from University of Utrecht) has been performed.