Difficult Facemask Ventilation. It is not possible to provide adequate ventilation (e.g., confirmed by end-tidal carbondioxide detection), because of one or more of the following problems: inadequate mask seal, excessive gas leak, or excessive resistance to the ingress or egress of gas.
Difficult Supraglottic Airway Ventilation.It is not possible to provide adequate ventilation because of one or more of the following problems: difficult supraglottic airway placement, supraglottic airway placement requiring multiple attempts,inadequate supraglottic airway seal, excessive gas leak, or excessive resistance to the ingress or egress of gas.
4) 气管插管困难/插管失败
Difficult Laryngoscopy.Tracheal intubation requires multiple attempts or tracheal intubation fails after multiple attempts.
5) 困难拔管/拔管失败
Difficult or Failed Tracheal Intubation. The loss of airway patency and adequate ventilation after removal of a tracheal tube or supraglottic airway from a patient with a known or suspected difficult airway (i.e., an “at risk” extubation).
6) 有创气道建立困难
Difficult or Failed Invasive Airway. Anatomic features or abnormalities reducing or preventing the likelihood of successfully placing an airway into the trachea through the front of the neck.