Defibrillator Display Including CPR Depth Information

A method for providing adaptive Cardiopulmonary Resuscitation (CPR) treatment to a person in need of emergency assistance, the method comprising:

• obtaining, by a portable computing unit, values for depths of a plurality of the chest compressions;
• obtaining, by the portable computing unit, information about a physiological parameter of the person;
• and
• providing, at a first rate, periodic feedback to a user about chest compressions performed by the user based at least in part on the values for the depths of the plurality of the chest compressions and a target compression depth, and periodically determining, at a second rate that is slower than the first rate, whether to adjust the target compression depth based at least in part on the information about the physiological parameter of the person, so that multiple instances of feedback about chest compressions performed by the user are provided to the user for each instance of determining whether to adjust the target compression depth.