>>149
spo2測定で息止めるとちゃんと数値下がる?
https://m.youtube.com/watch%3Fv%3DdQKqGdJtAHo&;ved=2ahUKEwj89NCQlprqAhUNGKYKHeVBALAQwqsBMAB6BAgHEAM&usg=AOvVaw2QVBu_u8_2cY5BjSIJoJ9r