Patent ID: 8979764
Filing Date: 2015-03-17
Classification: A61B,A61H,A61N

Abstract:
1. An external defibrillator, comprising: a light sensor configured to obtain measurements regarding light detection based on the presence of a rescuer's hands relative to the light sensor during chest compressions; an accelerometer positioned to move in coordination with a person's breastbone and obtain values for depths for the chest compressions; a computing unit connected to memory that stores computer instructions for: determining a compression rate for the chest compressions; determining, based on the measurements regarding light detection based on the presence of the rescuer's hands relative to the light sensor during the chest compressions from the light sensor and information about the compression rate, whether the rescuer is releasing the chest of a person during manual CPR chest compressions; and a device for providing feedback to a rescuer about chest compressions performed by the rescuer based at least in part on the determination of whether the rescuer is releasing the chest of the person.