Surgery – Truss – Pad
Patent
1988-08-19
1991-02-05
Jaworski, Francis
Surgery
Truss
Pad
128687, A61B 502
Patent
active
049896113
ABSTRACT:
Seismic techniques and principles are used to provide a noninvasive method and apparatus for assessing selective cardiac performance by detecting compression waves generated by heart muscle function. An analog signal is generated by detecting compression waves in the range of 0.025 Hz to about 800 Hz at an exterior surface of a subject's body by an accelerometer having a sensitivity of one (1) micro inch at one (1) Hz. Compression waves at frequencies above about 50 Hz are eliminated from the analog signal and then single full-cycle functions of the heart muscle are selected from a series of such cycles making up the analog signal. The selected single cycles may be averaged and waveform distortion may be removed from the averaged signal. Total energy level of the compression wave may be calculated and then the averaged signal may be displayed for visual analysis of a compression wave cycle representative of the muscle function of the heart.
REFERENCES:
patent: Re27042 (1971-01-01), Jorgensen et al.
patent: Re31097 (1982-12-01), Vas et al.
patent: 3318303 (1967-05-01), Hammacher
patent: 3385289 (1968-05-01), Lawson et al.
patent: 3695253 (1972-10-01), Vielhauer
patent: 3762397 (1973-10-01), Cage
patent: 3773033 (1973-11-01), Rodbard et al.
patent: 3878832 (1975-04-01), Tickner et al.
patent: 3908639 (1975-09-01), McIntyre
patent: 4094308 (1978-06-01), Cormier
patent: 4204544 (1980-05-01), Feldstein et al.
patent: 4362164 (1982-12-01), Little et al.
patent: 4378022 (1983-03-01), Suobank et al.
patent: 4378022 (1983-03-01), Suobank et al.
patent: 4383534 (1983-05-01), Peters
patent: 4422458 (1983-12-01), Kravath
patent: 4428380 (1984-01-01), Wong et al.
patent: 4446873 (1984-05-01), Groch et al.
Showalter, S. J. et al., "A Quantitative Description of the Aortic Ejection Click and First Heart Sound", 3rd Ann. Symp. on Comp. Appln. in Med., 10/14-10/17/1979, Wash. D.C.
Moyer, D. F. et al., "Instrumentation for the Diagnosis of CAD", A IEEE Transactions, vol. 80, part 1, 1961, pp. 717-721.
Iwata, A. et al., "Algorithm for Detecting the First & Second Heart Sounds by Spectral Tracking", Med. & Biol. Eng. & Computing, Jan. 1980, pp. 19-26.
Nandagopal, D. et al., "Spectral Analysis of Second Heart Sound in Normal Children by Selective LPC", MBEC, May 1984, p. 229.
Sarkady, A. et al., "A 16-Bit Micro-Computer Based Biomedical Signal Processor", 3rd Annual Symp. on Computer Applns. in Medicine, Oct. 14-17, 1979, Wash., D.C.
Copy of p. 402 of McGrow-Hill Dictionary of Scientific and Technical Terms, Fourth Edition, containing the definition of "Compressional Wave".
Copy of a Manufacturer's Brochure Page Showing the PCT Model 393C Seismic Accelerometer.
Copy of the Operator's Manual for the Cardiokinetic Cardiokymograph.
IEEE Transactions on Biomedical Engineering, vol. BME-26, No. 1, Jan. 1979, D. H. Zilm et al.
Electronic Design, vol. 26, No. 4, Feb. 15, 1978, "IC Accelerometer--So Tiny, It Monitors the Heart from Within".
Salerno David M.
Zanetti John M.
Jaworski Francis
SeisMed Instruments, Inc.
LandOfFree
Cardiac compression wave measuring system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cardiac compression wave measuring system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cardiac compression wave measuring system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3539