The CPR compression plate is a teaching tool that assists in cardiopulmonary resuscitation training. Its principle lies in helping trainees master the correct compression depth, frequency and position through mechanical or electronic feedback systems.

Firstly, the surface of the pressure plate is designed in accordance with the anatomical structure of the human thorax, providing a reference for the pressure area, enabling trainees to directly locate the middle and lower sections of the sternum.

Secondly, it is equipped with a pressure sensing device or an elastic rebound system inside. When trainees perform external chest compressions, it can simulate the resistance and rebound effect of the real chest cavity, thereby training the operator's force application intensity and rhythm. Some high-end press plates are also equipped with electronic display or sound prompt functions. When the pressing depth is insufficient, the frequency is too fast or too slow, it will immediately give feedback to help trainees correct their movements in time.

Through this real-time feedback mechanism, trainees can master the standardized operation essentials in a short time and avoid reducing the resuscitation effect due to improper pressing.

Overall, the CPR compression board, with simulation and feedback as its core principles, effectively enhances the learning efficiency and training quality of cardiopulmonary resuscitation skills.