An NPA, or nasopharyngeal airway, is a soft flexible tube inserted through the nose to keep a person’s airway open when they can’t maintain it on their own. Sometimes called a “nasal trumpet” because of its flared end, it’s one of the most common airway devices used in emergency medicine, surgery, and critical care. The tube passes through the nasal cavity and sits in the back of the throat, creating a clear channel for air to flow to the lungs.
How an NPA Works
When someone is unconscious, sedated, or has a reduced level of alertness, the tongue and soft tissues in the throat can collapse backward and block the airway. An NPA bypasses that obstruction. The tube extends from the nostril to the area just behind the tongue, holding a passage open so air can move freely. It’s a simple, low-tech solution that can prevent a life-threatening situation from developing.
NPAs are typically made from PVC (polyvinyl chloride), silicone, or other latex-free compounds. Silicone versions are inherently hypoallergenic, while PVC devices should be checked for latex content if allergy is a concern. The tubes are soft and pliable, which makes them relatively comfortable compared to rigid airway devices.
Why an NPA Is Preferred Over a Mouth Airway
The other common basic airway device is an OPA, or oropharyngeal airway, which goes in through the mouth. The key difference comes down to the gag reflex. An OPA sits on the back of the tongue, which triggers gagging and vomiting in anyone who is even partially conscious. That makes it usable only in deeply unconscious patients.
An NPA, by contrast, is far better tolerated. It doesn’t trigger the gag reflex, so it can be used in patients who are semiconscious, lightly sedated, or somewhere between alert and fully unresponsive. This makes it especially useful in emergency settings where a patient’s level of consciousness may be changing rapidly.
How It’s Sized and Inserted
Getting the right size matters. Too short and it won’t reach far enough to hold the airway open. Too long and it can cause gagging or other complications. The standard method is to hold the tube against the side of the patient’s face: the correct length extends from the tip of the nose to the tragus of the ear (the small pointed flap of cartilage in front of the ear canal). The tube is measured in its natural curved position, not straightened out.
Before insertion, both nostrils are checked and the wider one is selected. The tube is coated with a water-soluble lubricant or numbing gel. It’s then slid into the nostril aimed straight back, parallel to the floor of the nasal cavity, not angled upward. The bevel (the angled opening at the tip) faces toward the nasal septum, the wall dividing the two sides of the nose. Gentle, steady pressure guides it through. If resistance is met, a slight rotation or switching to the other nostril usually solves the problem.
When an NPA Should Not Be Used
The most critical contraindication is a suspected fracture at the base of the skull, particularly the cribriform plate, which is a thin bone separating the nasal cavity from the brain. Inserting a tube through a fractured cribriform plate could push it directly into brain tissue. Signs that suggest this type of fracture include bruising behind the ears (called Battle sign), bruising around both eyes (raccoon eyes), or clear fluid leaking from the nose or ears, which may be cerebrospinal fluid.
Central facial fractures carry similar risks. These injuries can collapse the bony structures separating the nasal passages from the brain, and forcing a tube through could cause further damage or introduce bacteria into the sterile fluid surrounding the brain, potentially causing meningitis.
NPAs are also generally avoided in patients who have recently had nose surgery, such as rhinoplasty or septoplasty, because the tube can damage healing tissue or compromise the surgical repair. A severe bleeding disorder is another reason to avoid placement, since the nasal passages are rich with blood vessels.
Possible Complications
The most common complication is nosebleeds. The nasal passages contain delicate tissue and blood vessels, and even careful insertion can cause some bleeding. More serious but less common risks include tearing of the soft tissue lining the nose, damage to enlarged adenoid tissue, or the tube accidentally tunneling behind the wall of the throat rather than sitting in the open airway.
If an NPA stays in place for more than several days, it can block normal sinus drainage and increase the risk of sinus infections or middle ear infections. A deviated septum, where the wall between the nostrils is significantly off-center, can make insertion difficult or impossible on one or both sides. In rare cases, the device can trigger laryngospasm, an involuntary tightening of the vocal cords, or worsen acid reflux. Secretions can also clog the tube, which means it needs regular checking and suctioning to stay functional.
Where NPAs Are Commonly Used
You’ll find NPAs used across a range of medical settings. In operating rooms, they help maintain open airways in sedated patients. In emergency departments and ambulances, paramedics use them for trauma patients or anyone with a declining level of consciousness. They’re a standard part of first-responder kits because they’re quick to place, don’t require specialized equipment, and work in patients who still have some level of awareness.
NPAs are considered a basic airway management tool, meaning they’re a first step rather than a definitive solution. If a patient’s condition worsens or the NPA isn’t enough to maintain adequate breathing, medical teams move to more advanced options like intubation. But for keeping the airway open in the short term, the NPA remains one of the simplest and most reliable devices available.