Systems and methods of use for a wearable ultrasound blood flow sensor

A system for providing patient care guidance to a caregiver based on ultrasound detection of blood flow, the system comprising:

• a defibrillator comprising an electrode assembly and a first output device;
• and
• a portable computing device communicatively coupled to the defibrillator and comprising a second output device;
• a Doppler shift waveform evaluation engine disposed at one or more of the defibrillator and the portable computing device;
• and
• a chest compression evaluation engine configured to receive data signals representing a chest compression waveform and identify chest compression frequency components;
• at least one wearable ultrasound blood flow sensor configured to couple to the Doppler shift waveform evaluation engine and to a patient,
• wherein the Doppler shift waveform evaluation engine is configured to:
• receive data signals representing at least one Doppler shift waveform from the at least one wearable ultrasound blood flow sensor,
• analyze the at least one Doppler shift waveform to identify blood flow frequency components,
• isolate a subset of the blood flow frequency components that are absent from the chest compression frequency components,
• identify the isolated subset of the blood flow frequency components as frequency components associated with heart-induced blood flow, and
• generate caregiver instructions with at least one of the first output device and the second output device according to a cardiac arrest protocol, and according to a non-cardiac arrest protocol in response to the identified heart-induced blood flow.