The EC clamp technique of bag-mask ventilations.

This color illustration shows the E.C. clamp technique of bag-mask ventilations. With the victim in the supine position, the rescuer uses three fingers on one hand to lift the jaw toward the mask, opening the airway. The placement of these three fingers resembles the shape of a capital E. Meanwhile, the thumb and index finger hold the mask to the face, forming a capital C shape. This helps create a tight seal between the mask and the victim’s face, which is required for effective bag-mask ventilation. This figure is copyright 2015 by the American Heart Association. There is a caption beneath this Figure which reads: “Three fingers of one hand lift the jaw (they form the “E”) while the thumb and index finger hold the mask to the face (making a “C”).”