Corrective prompting system for appropriate chest compressions

An automated external defibrillator (AED) having a corrective cardio-pulmonary resuscitation (CPR) prompting system, comprising:

• a sensor that provides compression measurement data representative of CPR chest compressions;
• a control system including a microprocessor programmed to automatically run a non-parametric, Information-Theoretic analysis of the compression measurement data and store results in a memory within the control system, the analysis including:
• ranking provided compression measurement data as the compression measurement data is provided from the sensor;
• determining a prompt time TN in the future for review;
• locating the compression measurement data that has been ranked at TN in an initial expected histogram creating a histogram of depth and rate aspects of the compression data measurements with upper and lower limits, that divides the intervals of the histogram into a plurality of sections;
• weighting the compression measurement data located in the plurality of sections of the histogram based on a plurality of factors;
• deriving information content of the compression measurement data, after weighting the compression measurement data, by mapping a probability density function into an information content function;
• and
• determining if one of a plurality of corrective prompts are necessary based on the information content of the compression measurement data that has been derived;
• and
• a prompting device that provides corrective CPR instructions corresponding to the one of the plurality of corrective prompts that are determined by the control system to be necessary.