What is the correct hand position for clearing a severe airway obstruction in an obese or pregnant adult?

The correct hand position for clearing a severe airway obstruction in an obese or pregnant adult is indeed on the midline of the sternum, level with the armpits. This position is essential because it aligns with the anatomical structure of the chest and allows for effective application of pressure during the maneuver. By positioning the hands at this level, the rescuer can generate sufficient force to create a thrust that compresses the lungs, which in turn helps expel an object blocking the airway.

This technique is adapted for individuals who may have excess abdominal tissue or a different thoracic structure due to pregnancy, thereby ensuring that the force is applied effectively to the chest rather than the abdomen, where it may not be as effective or could potentially cause harm. The mid-sternum location, near the armpits, helps to maximize the effectiveness of the thrust by utilizing the strongest part of the chest cavity, promoting airflow and potentially dislodging the object obstructing the airway.

In contrast, other positions such as those on the lower abdomen or below the breasts may not provide the same level of efficacy in generating the necessary intrathoracic pressure needed to clear the obstruction.