External defibrillator
AssigneeHeartsine Technologies Limited
InventorsJohn McCune Anderson, Cesar Oswaldo Navarro-Paredes, Rebecca DiMaio
Life of this patent
Estimating the term…
Abstract
An external defibrillator estimates the phase of ventricular defibrillation (VF) by deriving, from an ECG exhibiting VF, at least one quality marker representing the morphology of the ECG and, therefore, the duration of the VF. The duration of the VF is calculated as a function of the value (s) of the quality marker (s). The quality marker (s) may comprise any one or more of the median slope of the ECG, the average slope of the ECG, the ratio of the power in relatively high and low frequency bands of the ECG, and a measure of the density and amplitude of peaks in the ECG, over a predetermined period.
Claims9
A method comprising:
- receiving electrical signals from the pair of electrodes when the pair of electrodes are in contact with a patient;
- determining, via a processor and based on the electrical signals, an electrocardiogram of the patient;
- and
- when, based on the electrocardiogram, the patient is in a state of ventricular fibrillation:
- identifying a density of peaks over a period of time in the electrocardiogram;
- estimating a current phase of ventricular fibrillation based on the density of peaks;
- and
- outputting an instruction based on the current phase.
Dependencies are inferred from the claim text.