The jaw thrust maneuver is used to open an unconscious person’s airway without moving the neck. Its primary purpose is to lift the lower jaw forward so the tongue moves away from the back of the throat, clearing the airway for breathing. This technique is especially important when a neck or spinal injury is suspected, because the more common method of opening the airway (tilting the head back and lifting the chin) requires moving the neck and could worsen spinal damage.
Why the Airway Gets Blocked
When someone loses consciousness, the muscles in the throat and tongue relax completely. The tongue, which is anchored to the lower jaw, falls backward under gravity and blocks the upper airway. This obstruction can make breathing impossible, even if the person’s lungs and brain are otherwise trying to breathe normally. Any effective airway maneuver works by pulling the tongue forward, and the fastest way to do that is by repositioning the jaw it’s attached to.
How It Differs From Head-Tilt Chin-Lift
The head-tilt chin-lift is the standard, go-to method for opening an airway. You tilt the person’s head back and lift the chin, which pulls the tongue forward and clears the throat. It’s simple, effective, and what most people learn in a basic CPR course.
The jaw thrust accomplishes the same goal through a different motion. Instead of tilting the head, you push the lower jaw upward and forward while keeping the neck completely still. Research comparing the two techniques found that the jaw thrust produces the least movement in the upper cervical spine, particularly at the C1-C2 vertebrae, which are the most vulnerable segments in a neck injury. That minimal movement is what makes it the recommended technique whenever spinal injury is a concern.
The tradeoff is difficulty. The jaw thrust requires both hands positioned on either side of the jaw, which makes it harder for a single rescuer to simultaneously deliver rescue breaths or hold a bag mask in place. Head-tilt chin-lift can be done with one hand, freeing the other for ventilation. This is why head-tilt chin-lift remains the preferred method in situations where there’s no reason to suspect a neck injury.
When It’s Used
The jaw thrust is indicated in several specific scenarios:
- Suspected spinal injury: Car crashes, falls from height, diving accidents, or any trauma where the neck may have been impacted. The jaw thrust opens the airway without extending or rotating the cervical spine.
- Unconscious trauma patients: When someone is found unresponsive after any kind of accident and the mechanism of injury is unknown, rescuers default to the jaw thrust to be safe.
- During anesthesia and sedation: Patients under general anesthesia lose muscle tone in the airway, and providers routinely use the jaw thrust to maintain an open airway while delivering ventilation through a face mask.
- When head-tilt chin-lift fails: If tilting the head back doesn’t relieve the obstruction, a jaw thrust can provide a more forceful forward displacement of the jaw and tongue.
How the Maneuver Is Performed
The rescuer stands or kneels at the top of the person’s head. Both palms are placed on the temples, and the fingers are hooked under the angles of the lower jaw on each side. The fingers then lift the jaw upward and forward, pushing the lower teeth in front of the upper teeth. This forward displacement pulls the tongue off the back of the throat.
Throughout this motion, the neck stays in a neutral position. There’s no tilting, turning, or extending. If the person is lying on their back, the head stays flat against the surface. The force comes entirely from the fingers lifting the jawbone itself. During mask ventilation, the thumbs and palms can simultaneously press down on a face mask to create a seal, though this takes practice to do effectively.
Potential Risks
The jaw thrust is generally safe, but forceful or repeated jaw manipulation can dislocate the temporomandibular joint (the hinge where the jaw meets the skull). This is more common in sedated or anesthetized patients whose muscles offer no resistance. TMJ dislocation causes pain, tenderness, and an inability to close the mouth. If it’s recognized and treated quickly, it typically resolves without lasting problems, but dislocation left untreated for more than two weeks can lead to scarring in the joint or even fractures that require surgery.
In emergency situations, the risk of a jaw dislocation is far outweighed by the need to restore breathing. An obstructed airway will cause brain damage within minutes, so maintaining airflow always takes priority.
Practical Challenges for Solo Rescuers
The biggest limitation of the jaw thrust is that it occupies both hands. In a two-person rescue, one person can maintain the jaw thrust while the other delivers breaths with a bag mask. A lone rescuer faces a real challenge: holding the jaw forward while also sealing a mask and squeezing the bag is technically demanding and often ineffective without training.
For this reason, resuscitation guidelines note that if the jaw thrust alone doesn’t open the airway and a lone rescuer can’t ventilate, they may need to carefully add a slight head tilt. Maintaining breathing takes precedence over spinal precautions, because oxygen deprivation is immediately life-threatening. The jaw thrust remains the first choice, but it’s not useful if it can’t actually deliver air to the lungs.