Monitoring physiological condition and detecting abnormalities

• US 7,846,104 B2
• Filed: 05/02/2007
• Issued: 12/07/2010
• Est. Priority Date: 02/08/2007
• Status: Active Grant

• Current Assignee: Heart Force Medical, Inc.
• Original Assignee: Heart Force Medical, Inc.
• Inventors: Kaminska, Bozena, MacQuarrie, David
• Primary Examiner(s): Layno; Carl H
• Assistant Examiner(s): LEE, YUN H
• Application Number:
  US11/743,591
• Publication Number:
  US 20080194975A1
• Time in Patent Office: 1,315 Days
• Field of Search: 600/481, 600/500, 600/501, 600/508, 600/513
• US Class Current: 600/481
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/02 Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
• CPC Class Codes: A61B 5/1102 Ballistocardiography
• CPC Class Codes: A61B 5/349 Detecting specific parameters of the electrocardiograph cycle

Abstract

A method for monitoring an individual'"'"'s physiological condition and detecting abnormalities therein, comprising concurrently receiving an electrocardiograph signal and a ballistocardiograph signal. The electrocardiograph and ballistocardiograph signals are conditioned to minimize background extraneous noise after which, each signal is concurrently processed and analyzed to detect repeating cyclical patterns and further characterized to identify individual components of the repeating cycles. At least one individual component in one signal is selected as a reference marker for a selected component in the other signal. The two signals are then synchronized, outputs produced therefrom and stored in a database.

Claims

1. A method for monitoring an individual'"'"'s physiological condition comprising:

acquiring electrocardiograph and ballistocardiograph signals from said individual;

receiving said electrocardiograph and ballistocardiograph signals at a computer;

said computer including a microprocessor;

converting said electrocardiograph and ballistocardiograph signals into electrocardiograph data and ballistocardiograph data;

synchronizing said electrocardiograph data with said ballistocardiograph data; and

generating an output indicative of said individual'"'"'s physiological condition.

2. A method as claimed in claim 1, wherein said electrocardiograph and ballistocardiograph signals are acquired by detecting and transmitting said electrocardiograph and ballistocardiograph signals of said individual to said computer.

3. A method as claimed in claim 2, wherein said ballistocardiograph signal is detected by an accelerometer.

4. A method as claimed in claim 3, wherein said accelerometer is for communication with a sternum of said individual.

5. A method as claimed in claim 2, wherein said electrocardiograph signal is detected by an electrocardiograph.

6. A method as claimed in claim 1, wherein said electrocardiograph and ballistocardiograph signals are converted by an analog-digital converter.

7. A method as claimed in claim 1, wherein said computer includes a database in communication with said microprocessor, said database for storing said electrocardiograph data and said ballistocardiograph data.

8. A method as claimed in claim 7, wherein said output is a comparison of said electrocardiograph data and said ballistocardiograph data of said individual with reference electrocardiograph and ballistocardiograph wave pattern data, said reference electrocardiograph and ballistocardiograph wave pattern data being stored in said database.

9. A method as claimed in claim 7, wherein said output is a comparison of at least one resting-stage electrocardiograph-ballistocardiograph signal set and at least one post-exercise electrocardiograph-ballistocardiograph signal set.

10. A method as claimed in claim 9, wherein said at least one resting-stage electrocardiograph-ballistocardiograph signal set and said at least one post-exercise electrocardiograph-ballistocardiograph signal set are stored in said database.

11. A method as claimed in claim 7, wherein said computer includes a graphical user interface in communication with said microprocessor, said graphical user interface for allowing an operator to input data into said database.

12. A method as claimed in claim 1, wherein synchronizing said electrocardiograph data with said ballistocardiograph data includes aligning an R peak of an electrocardiograph waveform corresponding to said electrocardiograph data with an H peak of a ballistocardiograph waveform corresponding to said ballistocardiograph data.

13. A method as claimed in claim 1, wherein said output is provided on a device selected from the group consisting of:

monitors, screens, printers and plotters.

14. A method as claimed in claim 1, wherein said output is a synchronized electrocardiograph-ballistocardiograph waveform.

15. A method as claimed in claim 1, wherein said electrocardiograph signal is passed through a filter provided with a high-pass cutoff frequency of about 40 Hz and a low-pass filter of about 1 Hz to condition said electrocardiograph signal prior to said electrocardiograph signal being converted.

16. A method as claimed in claim 1, wherein said ballistocardiograph signal is passed through a filter provided with a high-pass cutoff frequency of about 25 Hz and a low-pass filter of about 1 Hz to condition said ballistocardiograph signal prior to said ballistocardiograph signal being converted.