What should an officer do next if an infant has an obstructed airway and remains conscious after 5 back blows?

When an infant has an obstructed airway and remains conscious after five back blows, the next appropriate action is to administer chest thrusts. This technique helps create pressure in the chest that can expel the obstruction blocking the airway. Chest thrusts are especially effective for infants because they apply force to the chest without causing harm, and they are designed to help dislodge the object that is causing the obstruction.

Other methods, such as finger sweeps, are only recommended when you can see the obstruction in the mouth, as this could potentially push the object further down. Mouth-to-mouth breaths are not appropriate in this scenario since the infant is still conscious, and the priority is to ensure the airway is clear. Referring the case to advanced medical personnel might be necessary later if the situation does not improve, but immediate intervention to clear the obstruction is critical. Thus, administering chest thrusts is the correct course of action in this situation.