Which technique should NOT be used on an infant who is choking?

The technique that should not be used on an infant who is choking is abdominal thrusts. In infants, the anatomy and physiology are different from older children and adults, and abdominal thrusts can cause injury, such as damage to internal organs, due to the smaller size and more fragile structure of an infant's body.

Instead, back slaps and chest thrusts are appropriate techniques to help an infant who is choking. Back slaps help to create pressure in the airway to expel the obstruction, while chest thrusts are an alternative that can also aid in dislodging an object. Nasal suction is typically not indicated for choking situations as it is intended for clearing nasal passages, not for removing obstructions from the airway.

Understanding the specific techniques that are safe and effective for different age groups is critical in effectively managing choking emergencies.