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Event alerting through actigraphy embedded within electrocardiographic data

  • US 9,737,224 B2
  • Filed: 11/16/2013
  • Issued: 08/22/2017
  • Est. Priority Date: 09/25/2013
  • Status: Active Grant
First Claim
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1. An extended wear electrocardiography and physiological sensor monitor recorder, comprising:

  • a sealed housing adapted to be removably secured into a non-conductive receptacle on a disposable extended wear electrode patch; and

    an electronic circuitry comprised within the sealed housing, comprising;

    an electrocardiographic front end circuit electrically interfaced to an externally-powered micro-controller and operable to sense electrocardiographic signals through electrocardiographic electrodes provided on the disposable extended wear electrode patch, each of the electrocardiographic electrodes adapted to be positioned axially along the midline of the sternum for capturing action potential propagation;

    an actigraphy sensor electrically interfaced with the micro-controller and operable to sense actigraphy event occurrences based on movement of the sensor using an actigraphy event occurrence criteria and to send an interrupt request (IRQ) signal to the micro-controller upon sensing each of the actigraphy event occurrences;

    the externally-powered micro-controller operable to execute under micro-programmable control, the micro-controller further operable to sample the electrocardiographic signals and to sample one of the actigraphy event occurrences upon receiving one of the IRQ signals, to embed the samples of the actigraphy event occurrences within a data stream that is recorded to an externally-powered flash memory and that comprises the samples of the electrocardiographic signals, the embedding comprising buffering each of the actigraphy event occurrences samples, compressing each of the buffered actigraphy event occurrences samples, buffering each of the compressed actigraphy event occurrences samples, and writing the buffered compressed actigraphy event occurrences samples into the data stream; and

    the externally-powered flash memory electrically interfaced with the micro-controller and operable to store the samples of the electrocardiographic signals and the samples of the actigraphy event occurrences written into the data stream.

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