Final answer:
To help a conscious choking adult or child, stand behind the person, support their chest, and administer up to five sharp back blows between the shoulder blades with the heel of your hand.
Step-by-step explanation:
When providing care to a conscious choking adult or child, the correct technique for performing back blows is as follows: Stand behind the victim and slightly to one side. Support their chest with one hand and lean them slightly forward so that when you administer the back blows, gravity can help dislodge the trapped object. Use the heel of your other hand to give up to five sharp blows between the person's shoulder blades. It is essential to check between blows if the blockage has been dislodged.
If the back blows do not clear the airway, you can proceed to the Heimlich maneuver or abdominal thrusts. For a child, you will use less force than you would with an adult. If the person is an infant (younger than one year old), do not perform abdominal thrusts or the Heimlich maneuver. Instead, give chest thrusts and back slaps to attempt to dislodge the object.