Development of an Educational Equipment “Dock-kun" to Help School Children Master High-quality Cardiac Massage

Other: One of the most effective ways to increase the cardiopulmonary resuscitation (CPR) rate of lay rescuers is through education of school children. We developed a learning tool called “Dock-kun" to help school children understand and master high-quality manual cardiac massage. With “Dock-kun," school children can visually learn about the physiology of CPR and how to correctly perform this life-saving technique by checking the amount of water, a surrogate for blood, being pumped out of the model heart and sucked back into the heart with each compression-decompression cycle. The forward flow was maximized when the high-quality cardiac massage was performed with a depth of 4.5-5.0 cm and a rate of 105-110 compressions per minute. The real-time flow of “water" and feedback to the rescuer provide a means for school children to learn high-quality cardiac massage technique and understand its related mechanophysiology. Workshops using this new educational tool will greatly contribute to widespread knowledge of the high-quality cardiac massage among school children.