What should you lubricate the nasopharyngeal airway tube with?

The nasopharyngeal airway tube should be lubricated with a water-soluble lubricant, such as a sterile water-based gel. This helps facilitate easy insertion and minimizes trauma to the mucosal surfaces. Avoid using oil-based lubricants, as they can cause irritation and are not recommended for use in medical applications. Always ensure that the lubricant is sterile to prevent infection.