Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2008-02-26
2010-06-15
Manuel, George (Department: 3762)
Surgery
Diagnostic testing
Cardiovascular
Reexamination Certificate
active
07738949
ABSTRACT:
The invention relates to a method for transforming physiological data from the time domain to the frequency domain. The method includes the steps of: providing a plurality of digital data in the time domain; providing a microcomputer programmed to run a recursive Fourier transform estimation algorithm; calculating, for each newly received digital data in the time domain, an integer index using modulo(N) arithmetic based on a time the each newly received data was received; selecting a frequency vector from a plurality of N frequency vectors using the integer index; and updating the plurality of frequency coefficients according to a recursive equation including the selected frequency vector as an input variable. The invention also relates to an apparatus that performs a recursive Fourier transform estimation algorithm to convert data in the time domain to data in the frequency domain.
REFERENCES:
patent: 7336982 (2008-02-01), Yoo
patent: 7403875 (2008-07-01), Vogel et al.
patent: 2002/0165471 (2002-11-01), Halperin et al.
patent: 2005/0256415 (2005-11-01), Tan et al.
patent: 1020070121346 (2007-12-01), None
Recursive Fourier Transform Algorithms with Integrated Windowing, Signal Processing 87 (2007) 1003-1013; first available on line Oct. 17, 2006 at www.sciencedirect.com; J. Gronczynski.
N. R. Lomb; Least-Squares Frequency Analysis Of Unequally Spaced Data; School of Physics, University of Sydney, N.S.W., Australia; May 15, 1975.
Jeffrey D. Scargle; Studies In Astronomical Time Series Analysis, II. Statistical Aspects Of Spectral Analysis Of Unevenly Spaced Data; The Astrophysical Journal; Dec. 15, 1982; pp. 835-853, vol. 263; The American Astronomical Society; published in USA.
American Heart Association Inc.; European Society Of Cardiology; Guidelines—Heart Rate Variability— Standards Of Measurement, Physiological Interpretation, And Clinical Use; Task Force of The European Society of Cardiology and The North American Society of Pacing and Electrophysiology (Membership of the Task Force listed in the Appendix); European Heart Journal, vol. 17, Mar. 1996, pp. 354-381: published in U.K.
Miles S. Ellenby, James McNames, Susanna Lai, Bruce A. McDonald, Donald Krieger, Robert J. Sclabassi, Brahm Goldstein; Uncoupling And Recoupling Of Autonomic Regulation Of The Heart Beat In Pediatric Septic Shock; Shock, Oct. 2001, pp. 274-277, vol. 16, No. 4; Oregon Health Sciences University, Portland, Oregon; published in USA.
Gari D. Clifford and Lionel Tarassenko; Quantifying Errors In Spectral Estimates Of HRV Due To Beat Replacement And Resampling; IEEE Transactions on Biomedical Engineering, vol. 52, No. 4, Apr. 2005; pp. 630-638.
Tran Thong; Real-time Evaluation Of Spectral Heart Rate Variability; Proceedings of the 28th IEEE EMBS Annual International Conference; Aug. 30-Sep. 3, 2006; pp. 1768-1771; published in USA.
Tran Thong, James McNames, Mateo Aboy; Lomb-Wech Periodogram for Non-uniform Sampling; Proceedings of the 26thAnnual International Conferene of the IEEE EMBS; Sep. 1-5, 2004; San Francisco, CA, USA.
International Search Report for PCT/US2009/034366, mailed Sep. 1, 2009 (11 pages).
Hiscock & Barclay LLP
Manuel George
Welch Allyn Inc.
Wieland Robert N
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