[Challenge] The present invention is directed to an oral device that includes an instrument below. Opener formed tubular body which has been trimmed to insert into the oral cavity [MEANS FOR SOLVING PROBLEMS] patients (4) (2), , Tongue depressor which is adapted to be removably inserted into the tubular body (4), with the insertion line and the injection path follows (1): - Respiratory gas injection channel leading to the distal end of the tongue depressor (12), - A surgical instrument inserted through conduit leading to the distal end of the tongue depressor. Opening device (2), wherein is adapted to be connected to a breathing gas source, and also to inject the gas into the mouth of a patient when (1) is not inserted tubular body (4) a tongue depressor and an injection tube which is formed so as to inject the gas injection channel of said tongue depressor (12) when the tongue depressor is inserted into the tubular body (20).【課題】 本発明は、以下の器具を備えた口腔内装置を対象としている。【解決手段】・患者の口腔内に挿入するように整えられた管状体(4)で形成された開口器(2)、・管状体(4)に取り外し可能に挿入されるように適合され、以下の注入路及び挿通用管路を備えた舌圧子(1):- 前記舌圧子の遠位端部に通じる呼吸ガス注入路(12)、- 前記舌圧子の遠位端部に通じる外科用器具挿通用管路。開口器(2)は、呼吸ガス源に接続されるように適合され、舌圧子(1)が管状体(4)に挿入されないときに患者の口腔内に前記ガスを注入するように、また前記舌圧子が前記管状体に挿入されるときに前記舌圧子の注入路(12)に前記ガスを注入するように形成された注入管(20)を備えている。
