Patent ID: 9386929
Filing Date: 2016-07-12
CPC Classification: A61B,A61N

Claim Text:
1. An automatic external defibrillator (AED) comprising: a pair of electrodes adapted to contact a subject; an ECG processor, coupled to the electrodes, which acts to analyze an ECG signal; an energy source; a high voltage circuit coupled to the energy source; a shock delivery circuit coupled to the ECG processor, the high voltage circuit, and the electrodes; an earphone adapted to detect acoustic signals of the ear of the subject; and an earphone signal processor, coupled to the earphone, which operates to sense the presence of pulsatile blood flow from signals received by the earphone, wherein the signal processor is coupled to the shock delivery circuit, wherein the shock delivery circuit makes a decision to shock based upon an absence of a pulsatile ECG signal from the ECG processor and an absence of pulsatile blood flow sensed by the earphone signal processor.