Active compression decompression cardiopulmonary resuscitation chest compression feedback

An apparatus for automatically providing an active compression decompression (ACD) cardiopulmonary resuscitation (CPR) treatment to a patient in need of emergency assistance, the apparatus comprising:

• one or more sensors, wherein at least one sensor of the one or more sensors is configured to measure force applied to a chest of the patient during the ACD CPR treatment,
• one or more processors and a non-transitory computer readable storage medium encoded with a computer program comprising instructions that, when executed, cause the one or more processors to perform operations comprising:
• processing the measured force during application of the ACD CPR treatment, wherein the ACD CPR treatment comprises a plurality of successive phases, the successive phases comprising at least an elevated compression phase, a non-elevated compression phase, an elevated decompression phase, and a non-elevated decompression phase;
• identifying, based on the processed force, a current phase of the ACD CPR treatment;
• determining, based on the current phase between the ACD CPR treatment and the processed force, a transition point between successive phases of the ACD CPR treatment;
• determining, responsive to determining the transition point between successive phases of the ACD CPR treatment, at least one application parameter for the ACD CPR treatment in a next phase of the successive phases of the ACD CPR treatment;
• and
• applying ACD CPR treatment based on the determined at least one application parameter for the ACD CPR treatment in the next phase of the successive phases of the ACD CPR treatment.