Unverified80% confidenceFactTime unknown
成人开放气道的头后仰角度约为额面与地面成一定角度(下颌尖与耳垂连线垂直于地面),角度不足气道未开放、过度可能损伤,实操课程会用模拟人反馈校正
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80%
Confidence
Long-term
Relevance
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