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Patient temperature response control system and method

  • US 9,763,823 B2
  • Filed: 09/24/2015
  • Issued: 09/19/2017
  • Est. Priority Date: 11/16/2007
  • Status: Active Grant
First Claim
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1. A system for use in a patient cooling therapy procedure, comprising:

  • a monitoring device comprising a three-axis accelerometer for monitoring patient shivering and for providing a monitoring signal responsive thereto, wherein the monitoring device is selectively interconnectable to and disconnectable from a patient, wherein the monitoring device is maintainable in fixed relation to a patient upon interconnection, and wherein said monitoring signal is indicative of acceleration in three dimensions as a function of time and comprises a stream of sequential data sets;

    a control unit configurable to cool and circulate a fluid through at least one contact pad for thermal exchange with a patient;

    at least one processor programmed to;

    control automatically a temperature of the circulated fluid so as to adjust a temperature of a patient during at least a portion of a patient cooling therapy procedure; and

    ,process said monitoring signal utilizing frequency domain processing to provide an output control signal indicative of a magnitude of patient shivering, wherein in said process said at least one processor is programmed to process a plurality of frames of said sequential data sets on an ongoing basis to determine spectral data corresponding with each different one of said plurality of frames of said sequential data sets, wherein each frame of said plurality of frames of said sequential data sets comprises a plurality of said sequential data sets, wherein sequential ones of said plurality of said frames of said sequential data sets are partially overlapping and partially non-overlapping, and wherein for said plurality of frames of said sequential data sets the at least one processor is programmed to collect and analyze spectral data sets corresponding with each different one of a plurality of different, predetermined frequency bands to detect said magnitude of patient shivering; and

    ,a user interface to graphically display, on an ongoing basis as a function of time during a patient cooling therapy procedure, each of the following;

    a predetermined patient temperature adjustment rate plot indicating a desired patient temperature to be reached as a function of time;

    a measured patient temperature plot indicating a measured patient temperature as a function of time; and

    ,patient motion data, responsive to said output control signal, indicating a magnitude of patient shivering, as a function of time, wherein said patient motion data is displayed in relation to a predetermined magnitude scale having a plurality of predetermined levels of patient motion indicative of increasing degrees of patient shivering.

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