PROBLEM TO BE SOLVED: To provide a nose mask which can apply an anesthesia gas to a laboratory animal, while preventing the anesthesia gas leaked from the nose mask from remaining in a casing means.SOLUTION: A nose mask 50 for applying an anesthesia gas G to a laboratory animal R in a casing means 101 includes an anesthesia tube 51, an outer wall 52 which is disposed outside the anesthesia tube 51 to form a space therebetween and an anesthesia recovery system 53 having an anesthesia recovery port 53a open to the space, by which the anesthesia gas G is recovered. The anesthesia tube 51 includes an anesthesia supply section 54 which opens to an wall of the anesthesia tube 51 so that the anesthesia is applied to the laboratory animal by inserting the nose of the laboratory animal R, an anesthesia introducing section 55 for introducing the anesthesia gas G to the anesthesia tube 51, and an anesthesia discharging section 56 for discharging the anesthesia gas G from the anesthesia tube 51.COPYRIGHT: (C)2009,JPO&INPIT【課題】ノーズマスクにおいて、漏れた麻酔ガスが筺体内に残留することを回避しつつ、実験動物に麻酔を施すことを可能にする。【解決手段】筺体101に収容された実験動物Rに麻酔ガスGを施すノーズマスク50は、麻酔管51と、麻酔管51の外側に麻酔管51との間に隙間を形成するように配置された外壁52と、隙間に麻酔ガスGを回収する回収口53aを開口した麻酔回収部53とを備える。麻酔管51は、麻酔管51の管壁に開口した、実験動物Rの鼻を差し込むことにより実験動物に麻酔を施す麻酔供給部54と、麻酔管51に麻酔ガスGを導入するための麻酔導入部55と、麻酔管51から麻酔ガスGを排出するための麻酔排出部56とを有する。【選択図】図5
