What should you do if you note minimal chest rise while ventilating with a bag-mask device despite a good seal?

When minimal chest rise is observed while ventilating with a bag-mask device, despite achieving a good seal, the most appropriate action is to reposition the airway and attempt to ventilate again. This step is critical because the issue may arise from improper head positioning or an obstructed airway that prevents effective air entry into the lungs.

Rescuers should ideally use the "sniffing" position, where the head is tilted back slightly and the chin is lifted, to open the airway more effectively. This repositioning can help ensure that the pharyngeal passage is clear, facilitating better ventilation and improving chest rise during the process.

Attaching an oxygen reservoir, using a smaller mask, or suctioning the airway may not directly address the fundamental issue of inadequate airway positioning or obstruction, which is why repositioning remains the most effective first step in such scenarios.