How should Brianna position Sarita to give back blows?

Positioning Sarita bent forward at the waist is essential for effectively delivering back blows during a choking emergency. This position allows gravity to assist in dislodging any obstruction from the airway. By bending forward, Sarita's chest cavity expands, making it easier for the rescuer to deliver firm back blows between her shoulder blades with the heel of their hand. This downward force helps produce a stronger impact, which is critical for relieving the obstruction.

In other positions, such as lying flat on her back or sitting upright in a chair, the effectiveness of the back blows would be reduced. A flat position could hinder the natural movement of the diaphragm and the abdomen, making it less likely that the obstruction would be expelled. Similarly, while sitting upright can sometimes offer stability, it does not provide the optimal angle that promotes the downward flow needed to clear the airway.

Bending backward at the waist is not appropriate as it can lead to increased pressure on the airway rather than allowing for an open passage for the object to be expelled. Therefore, the correct choice not only aligns with best practices in emergency response but also maximizes the chances of successfully resolving the choking.