• The tube is lubricated and inserted into the
nostril and positioned into the posterior pharynx.
• Advance the tube gently, following the natural curvature of the
nasal passage to direct the tube in a posterior inferior position.
• After measuring as above, use the largest diameter tube that
can fit into the nose without causing blanching of the nares.
• If passage does not occur easily, attempt the other nostril because
patients may have different size nasal passages.
• Figure 3–1 shows a nasopharyngeal
airway in place (sagittal view).