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METHOD AND SYSTEM FOR DETERMINING FLUID STATUS BASED ON A DYNAMIC IMPEDANCE SURROGATE FOR CENTRAL VENOUS PRESSURE

  • US 20150065897A1
  • Filed: 08/28/2013
  • Published: 03/05/2015
  • Est. Priority Date: 03/15/2013
  • Status: Abandoned Application
First Claim
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1. A method for determining fluid status with a central venous system of a heart, the method comprising:

  • collecting dynamic impedance (DI) data and static impedance (SI) data over multiple cardiac cycles (CC) for a persistent time period of interest (POI), the DI and SI data collected along a central venous (CV) vector that extends through a superior vena cava (SVC);

    analyzing the DI and SI data, collected over the persistent time POI, to obtain DI long-term variation (LTV) information and SI LTV information, respectively;

    detecting whether the DI LTV information and the SI LTV information include decreasing persistent trends in the DI and SI data; and

    when decreasing persistent trends are detected in the DI and SI data, generating an overload output indicating that the heart is experiencing a volume overload state.

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