METHOD OF DETECTING SIGNAL CLIPPING IN A WEARABLE AMBULATORY MEDICAL DEVICE

摘要

A wearable medical device and method of detecting clipping of ECG signals is disclosed. In one embodiment, the wearable medical device comprises a plurality of ECG sensing electrodes configured to sense an ECG of a patient and an ECG acquisition circuit electrically coupled to a pair of the plurality of ECG sensing electrodes and configured to provide an amplified and conditioned analog ECG signal, a programmable attenuation/gain stage electrically coupled between a first gain stage and a second gain stage, an ADC electrically coupled to the ECG acquisition circuit to receive and digitize the amplified and conditioned analog ECG signal and provide a digitized ECG signal, and a signal conditioning and control unit electrically coupled to the ECG acquisition circuit and the ADC to receive and monitor the digitized ECG signal and to detect clipping of the amplified and conditioned analog ECG signal based upon the digitized ECG signal.

主权项

1. A wearable medical device, comprising:
at least one sensing electrode configured to sense a cardiac signal of a patient; an acquisition circuit, operatively coupled to the at least one sensing electrode, configured to process the cardiac signal; at least one processor configured to detect a cardiac arrhythmia based on the processed cardiac signal; and a signal conditioning and control unit, operatively coupled to the acquisition circuit and the at least one processor, the signal conditioning circuit configured to
monitor the cardiac signal during processing by the acquisition circuit,control the processing of the cardiac signal performed by the acquisition circuit,identify one or more corrupted portions of the processed cardiac signal and flag the one or more corrupted portions of the processed cardiac signal with one or more markings indicating the one or more corrupted portions of the processed cardiac signal are compromised to prevent misdetection of the processed cardiac signal by the at least one processor, andprovide the processed cardiac signal to the at least one processor, the processed cardiac signal comprising the flagged one or more corrupted portions.