The 5 by 5 Choking Rule Explained for Emergency First Aid

What specific steps constitute the back blow component of the protocol?

To perform back blows effectively, you must position the person correctly and use the heel of your hand to create a forceful, upward-directed impact between the shoulder blades.

1. Stand slightly behind and to the side of the person, encouraging them to lean forward at the waist so gravity helps dislodge the object.
2. Support the person’s chest with one hand while keeping your stance stable to absorb the force of your own strikes.
3. Deliver five separate, sharp blows using the firm heel of your dominant hand directly between the shoulder blades.
4. Check after each blow to see if the obstruction has been expelled before proceeding to the next strike.

How should abdominal thrusts be performed correctly on an adult?

To perform abdominal thrusts, stand directly behind the person and wrap your arms around their waist. Place the thumb side of one fist against the abdomen, specifically just above the navel but well below the tip of the breastbone. Grasp this fist with your other hand and exert a sharp, inward and upward pull. Think of this motion as trying to lift the person off their feet, which generates the necessary force to clear the airway.

For example, if you are helping a tall individual, you may need to stand on a small step to achieve the proper leverage for an upward angle. An important nuance involves pregnant individuals or those with significant obesity; in these cases, you must shift your hand placement to the center of the chest, performing chest thrusts instead of abdominal ones to prevent internal injury.

In what circumstances should the back blow and abdominal thrust sequence be modified?

You must modify the sequence if the victim is pregnant, morbidly obese, or an infant, as abdominal pressure can cause severe internal trauma in these groups. A lot of people assume that you should perform a finger sweep to check for the object if you can't see it, but you should never perform a blind finger sweep because it often pushes the obstruction deeper into the airway. Only remove the object if you can clearly see it and easily reach it with your fingers.

What are the physiological mechanisms that allow these maneuvers to dislodge an airway obstruction?

These maneuvers utilize the principles of fluid dynamics and sudden pressure changes to create an artificial cough. By rapidly compressing the lungs, you generate a high-velocity burst of air, often exceeding 50 liters per minute, which creates enough force to eject a foreign object lodged in the trachea.

At what point should an individual transition from these maneuvers to cardiopulmonary resuscitation?

Transition to cardiopulmonary resuscitation the moment the person becomes unresponsive and collapses to the ground. Once they are unconscious, the airway muscles relax, which might allow the object to shift, but the primary concern is now the lack of oxygenated blood circulation. You must lower the person carefully to a flat, firm surface and immediately begin chest compressions to maintain blood flow to the brain and vital organs.

For example, if you are alone, make sure you have already called emergency services before starting compressions. A common nuance is that you should continue checking the mouth for the object during the compression cycles. If you see the object, remove it, but do not perform a blind sweep, as this remains dangerous even when the person is unconscious and the muscles are slack.

How does the procedure differ when applied to infants versus adults?

Infants require gentler handling and different positioning because their internal organs and skeletal structures are significantly more delicate than those of an adult.

Always adjust your force based on the size of the individual, using only the minimum pressure required to move the obstruction.

What are the primary risks or potential injuries associated with performing these maneuvers improperly?

Improper technique can lead to significant physical trauma, ranging from bruised soft tissue to severe internal organ damage.

• Ribs: Fractures can occur if thrusts are applied too high on the chest or with excessive force on the delicate lower rib cage.
• Liver: Lacerations or internal bleeding may result if the hands are positioned too low, impacting the upper abdominal organs.
• Sternum: Bruising or structural damage is possible if the force of the thrust is directed straight into the breastbone.
• Stomach: Gastric rupture or vomiting may be triggered by forceful, misplaced pressure applied directly over the mid-abdomen.

What signs indicate that an airway obstruction has been successfully cleared?

The obstruction is cleared when the person begins to breathe, speak, or cough forcefully. You should also look for the object to be expelled from the mouth, which often happens within 1 to 3 cycles of the protocol. If the person becomes responsive and starts crying or talking, the airway is open.