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APPARATUS AND METHOD FOR MONITORING THE DEGREE OF INTEGRATION BETWEEN THE FUNCTIONS OF THE HEART AND THE LUNGS, AND THE THERAPEUTIC SUCCESS OF RESUSCITATIVE INTERVENTIONS

  • US 20120118291A1
  • Filed: 04/27/2010
  • Published: 05/17/2012
  • Est. Priority Date: 04/27/2009
  • Status: Abandoned Application
First Claim
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1. A system for assessing and monitoring the coupling between lung perfusion and ventilation in a patient who is mechanically ventilated or who is breathing spontaneously through an artificial airway, the system comprising:

  • an adaptor configured to fit between the artificial airway and a mechanical ventilator;

    a measuring chamber in constant fluid communication with the adaptor but out of the main path of gases inhaled and/or exhaled by the patient through the adaptor, said measuring chamber comprising temperature and relative humidity sensors for measuring the temperature and humidity of gases inhaled and/or exhaled by the patient; and

    ,a monitoring unit in fluid and electrical communication with the measuring chamber, the monitoring unit comprising;

    one of a thermocouple and a flow meter;

    a suction pump for drawing said inhaled and/or exhaled gases from said adaptor and through said thermocouple or flow meter via said measuring chamber;

    display and data entry means; and

    a monitoring unit computer system processor and memory for the acquisition, conversion, and storage of data acquired from the temperature and relative humidity sensors, from the thermocouple or flow meter, and from an operator of the system, wherein the monitoring unit is configured to;

    a. detect the breathing phases of the patient by timing the interval between the low and/or high temperature and/or humidity plateaus between individual inhalations and/or exhalations as measured by the temperature and/or relative humidity sensors;

    b. obtain base heat exchange values from the measured temperature and relative humidity of the inhaled and/or exhaled gases and then repeatedly sample the temperature and relative humidity of the inhaled and/or exhaled gases at the prompt of the operator or according to a pre-determined interval;

    c. automatically calculate coupling index Qi of the form Qi=k1Δ



    knb×

    kv×

    kpr×

    kpa from sampled temperature and relative humidity readings and from patient data entered via data entry means by the operator; and

    d. display index Qi to the operator via display means over the course of a monitoring interval.

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