What should be done with the NPA before inserting it into a casualty's nostril?

Lubricating the outside of the nasopharyngeal airway (NPA) with water or sterile lubrication before insertion is important for several reasons. First, it helps reduce friction during insertion, making the process more comfortable for the casualty and minimizing the risk of trauma to the nasal passages. Lubrication can facilitate a smoother glide of the NPA into the nostril and down the airway, which is crucial in emergency situations where time and ease of insertion are critical.

Using appropriate lubrication also helps to ensure that the device can be inserted without obstructing the airway or causing discomfort, both of which are essential in the context of managing a casualty effectively. Proper technique during airway management can lead to better outcomes and ensures that the airway is maintained or established quickly.