I'm not certified to use a decompression needle, but to answer your second question, high-level training is needed. You can't get it by watching a video. I have those needles in the event I'm on a scene in which a person has the training but not the tools with them. Lower-level training is needed for the nasal airway.

To answer your second question, a nasal airway is a tube-like device inserted through a nostril to open up a blocked or collapsed airway. A decompression needle releases trapped air in the chest cavity. Trapped air in the chest cavity is a life-threatening situation. It prevents the lungs from expanding, thereby the patient has difficulty or is unable to breathe.

Jeanette Isabelle