500
Place in the correct order of the four steps necessary to use a BMV by two rescuers AFTER they have completed the initial assessment.
[(1).Rescuer 1 seals the mask and opens the airway by kneeling behind the victim's head, placing the thumbs along each side of the mask, sliding the fingers into position behind the angles of the jawbone and applying downward pressure with the thumbs to lift the jaw and tilt the head back to open the airway.
(2) Rescuer 1 postitions the mask so that it covers the victim's mouth and nose
(3). Rescuer 2 assembles the BMV by attaching the mask to the bag and valve
(4). Rescuer 2 begins ventilations by squeezing the bag slowly for about 1 second for an adult, child, or infant.]
3,2,1,4