研讨讲演称号:Commercial smartwatch with pulse oximeter detects short-time hypoxemia as well as standard medical-grade device: Validation study接着,意愿者经过佩戴三向非再吸入阀(three-way non-rebreathing valve),并分三阶段呼吸。前2分钟时,意愿者会吸入环境空气;之后5分钟吸入氧气较少混合气体(氧气浓度为12%),暂时降低意愿者血氧浓度,最后再吸入环境空气,直到 ... [查看原文]