Medical gas coupling, nasal cannula and oxygen gas supply

摘要

PROBLEM TO BE SOLVED: To provide a medical gas coupling and a nasal cannula capable of immediately stopping the supply of oxygen when a tube for passing oxygen is ignited. A medical gas coupling 40 has a hollow portion 53, a first connection end portion 56, and a second connection end portion 57, and a main body 50 forming a gas conduction path T through which oxygen gas passes. The valve body 60 is movably arranged in the hollow portion 53, and the first urging means 71 and the second urging means 72 for holding the valve body 60 at the central position of the hollow portion 53 are provided. When the first connection end 56 is softened or melted by heat, the valve body 50 moves by the urging force of the second urging means 72, and the gas conduction path T between the first connection end 56 and the hollow portion 53 is established. Close. When the second connection end portion 57 is softened or melted by heat, the valve body 60 moves by the urging force of the first urging means 71 and forms a gas conduction path T between the second connection end portion 57 and the hollow portion 53. Close. [Selection diagram] Fig. 4