Method and device for representing and monitoring functional parameters of a physiological system

• US 6,694,178 B1
• Filed: 10/03/2000
• Issued: 02/17/2004
• Est. Priority Date: 01/12/1998
• Status: Expired due to Fees

• Current Assignee: Energy-Lab Technologies GmbH
• Original Assignee: Energy-Lab Technologies GmbH
• Inventors: Kitachine, Youri, Gillessen, Werner, Soula, Anatoli
• Primary Examiner(s): EVANISKO, GEORGE ROBERT
• Application Number:
  US09/600,354
• Time in Patent Office: 1,232 Days
• Field of Search: 600/523, 600/512, 600/522, 600/506, 600/509
• US Class Current: 600/523
• CPC Class Codes: A61B 5/339 Displays specially adapted therefor

Abstract

The invention relates to a method and a device for representing and monitoring function parameters of a physiological system, in particular electrocardiographic data, which are derived from electronic measuring signals. The object of the present invention is to provide a method and a device which quickly and in a fashion which can be used by anyone render it possible to analyze the variation in process states and to predict future states. This object is achieved according to the invention by virtue of the fact that the data are combined to form a basic data model and are converted into a graphical portrait which is constructed in the manner of a three-dimensional topological model.

Claims

1. Method for representing and monitoring cyclical function parameters of electrocardiographic data, which are derived from electronic measuring signals, the data being combined to form a basic data model and being converted into a graphical portrait which is constructed in a three-dimensional topological model, comprising:

fixing an analysis cycle by determining the temporal spacing of at least two repeating significant variables,

digitizing the electrocardiographic data acquired during the analysis cycle,

feeding the digitized data to a storage unit,

assigning a color code and brightness value to the stored digitized data wherein the assignment of the color codes and brightness values are performed according to degree of deviation of the stored digitized data from empirically determined reference data,

determining space coordinates from the stored digitized data as surface interpolation points, interpolating the surface interpolation points to generate pixels between the surface interpolation points and generating an essentially closed surface from the pixels, and

feeding the essentially closed surface to an evaluation or output device,

calculating an autocorrelation function of analysis cycles to be evaluated, comparing the stored digitized data with empirically determined reference data and selecting the analysis cycle to be evaluated in accordance with the comparison,

leading the acquired data of an analysis cycle through a high-pass filter, digitizing the filtered acquired data and subtracting the filtered acquired data from unfiltered acquired data, grouping the subtracted data according to a value of the subtracted data,

performing a reference measurement to determine a sequence of the group subtracted data, storing a sequence of the for group subtracted data for each physiological system and applying the stored sequence of the group subtracted data to subsequent analysis cycles in order to determine variations in the electrocardiographic data.

2. Method according to claim 1, further comprising determining action potentials in a heart examination using a standardized 3-point recording.

3. Method according to claim 2 further comprising fixing an analysis cycle for determining significant action potentials of a heart muscle over the interval of two R pulses of an electrocardiogram.

4. Method according to claim 1 further comprising determining stored digitized data for generating the essentially closed surface over a time interval which covers a multiple of an analysis cycle.

5. Method according to claim 1 further comprising calling reference data from an electronic memory.

6. Method according to claim 1, wherein generating an essentially closed surface comprises generating an essentially closed surface over all complete analysis cycles of a time interval of the essentially closed surface.

7. Method according to claim 1 by correlation of correlating the acquired data of a plurality of analysis cycles to eliminate noise quantities.

8. Method according claim 1 further comprising transmitting the acquired data to diagnostic centers via data lines.

9. Method according to claim 1 further comprising storing the representation of the essentially closed, surface with a therapy recommendation.

10. Method according to claim 1 further comprising correlating the acquired data of a plurality of analysis cycles to reduce noise quantities.

11. Device for representing and monitoring cyclical function parameters of electrocardiographic data, the device comprising

data acquisition means for acquiring the electrocardiographic data and for converting the acquired data into electric signals,

a processing unit coupled to the data acquisition means for fixing an analysis cycle as a function of temporal spacing of at least two repeating significant variables,

an analog-to-digital converter for digitizing electrocardiographic data acquired within the analysis cycle and having a storage unit for storing the digitized data,

an evaluation unit with evaluation software for assigning a color code and brightness value to the digitized data wherein the evaluation unit determines degree of deviation of the stored digitized data from reference data and assigns color codes and brightness values as a function of the degree of deviation,

means for determining space coordinates as surface interpolation points;

means for interpolating the interpolation points to generate pixels between the interpolation points;

means for generating an essentially closed surface from the pixels, and

means for generating a three-dimensional, colored image with a closed surface on the basis of the acquired data and assigned color code and brightness value,

a control unit for conditioning the pixels generated between the interpolation points, and

an output unit coupled to the evaluation unit for displaying the colored image,

wherein the evaluation unit high pass filters the acquired data of an analysis cycle, digitizes the filtered data and subtracts the digitized filtered data from unfiltered data of the analysis cycle, groups the subtracted data thus obtained according to value of the subtracted data, and feeds a sequence of the group subtracted data to the storage unit,

and wherein the evaluation unit applies the sequence of the group subtracted data to subsequent analysis cycles in order to determine variations of the electrocardiographic data,

and wherein the evaluation unit calcualtes an autocorrelation function of analysis cycles to be evaluated and compares the autocorrelation function with empirically determined reference data, and wherein the evaluation unit selects the analysis cycle to be evaluated as a function of the comparison.

12. Device according to claim 11, further comprising an interface coupled to the evaluation unit for external data transmission.

13. Device according to claim 11, further comprising an amplifier coupled to the data acquisition means for amplifying the electric signals.

14. Device according to claim 11, wherein the data acquisition means comprise electrodes, pressure sensors, flowrate meters or optical sensors.