简介：Thefeasibilityoffenestrationoperationinmiddleearbonewithpulsedinfraredlaserisevaluated.HealthymaleNewZealandrabbitsinvivoareusedintheexperiment.Middleearmastoidboneofanimalmodeliscompletelyexposedwithconventionalmethods,andthenapulsedCO2laser（10.6μm）andanEr:YAGlaser（2.94μm）areusedtoperformthefenestrationoperation.Diamonddrillisalsousedasacontrolgroup.Thetotaloperationtimeandlightirradiationtimearerecordedandtheopeningefficiencyisassessed.Themorphologicalchangesandthermaldamagearoundtheopeningwindowonthemiddleearboneareexamined.Itisshownthatbothlasersystemsaresuitableforthefenestrationoperationinmiddleearbone,andthisno-touchtechniquehasalotofbenefitscomparedwithtraditionalmethods.Thebleedingduringoperationhasanimportanteffectonoperationtimeandthermalinjuryandneedstobecontrolledefficientlyinfurtherstudy.更多还原