Ergonomics became recognized as a result of:

Which of the following devices can be used as a simple mechanical airway adjunct in situations in which laryngoscopy is difficult and is similar to an oropharyngeal airway and also as a blind endotracheal tube introducer in situations in which laryngoscopy is difficult?

A) S.A.L.T. B) LMA C) ETC D) NPA

While the maxillary sinus appears radiolucent on a radiograph, the maxillary sinus walls appear radiopaque

Indicate whether the statement is true or false