Clinical meaning
Understanding the anatomical pathways for each suctioning route is essential for safe and effective airway clearance. Oropharyngeal (Yankauer) suctioning targets the oral cavity and posterior oropharynx, accessing pooled secretions above the glottis. The oropharynx extends from the soft palate to the epiglottis and contains the palatine tonsils, base of the tongue, and posterior pharyngeal wall. Oropharyngeal suctioning uses a rigid Yankauer catheter (tonsil-tip suction) and is considered a clean procedure because the oral cavity is not a sterile environment. This is the most common and least invasive form of suctioning and is within the nurse scope of practice in most jurisdictions. Nasopharyngeal suctioning involves inserting a flexible suction catheter through the nostril, following the floor of the nasal cavity (not upward) along the inferior turbinate into the nasopharynx and potentially to the level of the pharynx. The nasal cavity is lined with highly vascular mucosa (Kiesselbach plexus on the anterior septum), making epistaxis a significant risk. Nasopharyngeal suctioning reaches deeper secretions than oral suctioning and can stimulate a cough reflex to mobilize secretions from lower airways. This route requires a water-soluble lubricant and sterile technique with a flexible catheter. Endotracheal suctioning is performed through an existing endotracheal tube (ETT) or tracheostomy tube. The catheter bypasses the upper airway entirely and enters the trachea and potentially the mainstem bronchi. Because the lower respiratory tract is normally sterile below the larynx, strict sterile technique is mandatory. The catheter should be advanced until resistance is met (carina), then withdrawn 1-2 cm before applying suction to prevent carinal trauma and excessive coughing. Each technique has specific catheter types, pressure settings, insertion depths, and sterility requirements that the practical nurse must master.