GRAPHICAL TECHNIQUE FOR DETECTING CONGESTIVE HEART FAILURE

摘要

The invention provides a system to better detect the onset of congestive heart failure (CHF). The system consists of two primary components—the CHF Index Graph (CHFIG) and a body-worn sensor for measuring the necessary parameters—that correctly measure and analyze a set of parameters related to CHF. The CHFIG typically consists of 7 or 8 unique axes, each corresponding to a different CHF-related parameter. Each axis is normalized and scaled so that the plotted values trend outwards as a patient's trajectory towards CHF worsens. Titus, the area of a region constructed from the plotted values of the parameters increases as the values move further away from the center of the graph; this indicates the patient is trending towards CHF. Conversely, a healthy patient's parameters will be clustered relatively close to the center of the graph, creating a region with a much smaller area.

主权项

1. A method for characterizing heart failure in a patient, comprising the following steps:
generating the following first set of data parameters with a group of one or more sensors: fluid level, stroke volume, blood pressure, cardiac output, and SpO2, the first set of data parameters measured from the patient when the patient is in a relatively healthy state; transmitting the first set of data parameters from the group of one or more sensors to a display device; generating the following second set of data parameters with a group of one or more sensors: fluid level, stroke volume, blood pressure, cardiac output, and SpO2, the second set of data parameters measured from the patient after the first set of data parameters; transmitting the second set of data parameters from the group of one or more sensors to a display device; calculating a third set of data parameters from the first and second set of data parameters, the third set of data parameters indicating a change in a data parameter and calculated by subtracting a value from the first set of data parameters from a corresponding value in the second set of data parameters; determining a maximum value for the third set of data parameters for each of the data parameters; normalizing the third set of data parameters for each of the data parameters to fit on plotting axes by normalizing each data parameter in the third set of data parameters; generating a graphical image of a plot comprising: i) multiple axes, with each axis corresponding to a single, normalized change in a data parameter, and organized so that a value corresponding to the normalized change in the data parameter is further separated from the plot's origin as the patient's state of heart failure worsens; and ii) a region calculated from values plotted on each axis that increases in area as the patient's state of heart failure worsens; calculating the area of the region created from the values plotted on each axis using a mathematical algorithm; generating a graphical image on a display device, the graphical image showing a plot comprising: i) two axes; and ii) a line created from the calculated area and organized such that the slope of the line increases as the patients state of heart failure worsens.