Fig. 2
From: Effect of the Cardio First Angel™ device on CPR indices: a randomized controlled clinical trial
Illustration of proper positioning of the Cardio First Angel™ device. a The device is positioned over the lower one-third of the sternum. The rescuer-side portion consists of a red, round push-button that displays a pictogram illustrating proper device use. b The push-button fits in the palm of the rescuer’s hand as it would lie on the sternum during manual cardiopulmonary resuscitation (CPR). c The rescuer should maintain straight arms and back and flex at the waist as in standard manual CPR