Famous Patents
The first commercial microwave oven was nearly 6 feet tall and weighed in at 750 pounds.
PatentStorm News
Make the Most of PatentStorm
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest patents by subscribing to an RSS feed.
Got questions? Ask a Patent Expert!
Registered users: Manage your profile, comments and alerts.
US Patent 5036857 - Noninvasive diagnostic system for coronary artery disease
US Patent Issued on August 6, 1991
Estimated Patent Expiration Date:
October 26, 2009Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
October 26, 2009Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA method and system for non-invasively detecting Coronary Artery Disease. The method comprises analyzing the diastolic heart sounds detected from a patient's chest cavity during the diastolic portion of the heart cycle in order to identify a low level auditory component associated with turbulent blood flow in partially occluded coronary arteries. These diastolic heart sounds are modeled using advanced signal processing techniques such as Autoregressive (AR), Autoregressive Moving Averaging (ARMA) and Eigenvector methods, so that the presence of such an auditory component may be reliably indicated even under high noise conditions. The system includes an acoustic transducer, pulse sensor device, signal processor means and a diagnostic display. Additionally, the system includes a controller for automatically sequencing data collection, analysis and display stages, therefore requiring a minimum of operator interaction. The system further discloses a piezoelectric type low mass accelerometer for use as an acoustic transducer providing higher sensitivity at the high frequencies necessary for detecting coronary artery disease, specifically between 300 to 1200 Hz. In addition, the system discloses a method for automatically identifying and isolating a diastolic segment of a heart sound recording through a "window" placement technique. A window is placed relative to the second heart sound and various criteria are implemented to evaluate the recording for artifacts, i.e., data due to breath sounds, stomach growls, external ambient noise.Other References
| InventorsApplicationNo. 426770 filed on 10/26/1989US Classes:600/528, Detecting heart sound600/493Electric signal generated by sensing means responsive to pulse or Korotkoff soundsExaminersPrimary: Jaworski, Francis J.Assistant: Manuel, George Attorney, Agent or FirmUS Patent References3528297, 4220160, Method and apparatus for discrimination and detection of heart soundsIssued on: 09/02/1980 Inventor: Kimball , et al.4446873, Method and apparatus for detecting heart sounds Issued on: 05/08/1984 Inventor: Groch , et al.4467236, Piezoelectric acousto-electric generator Issued on: 08/21/1984 Inventor: Kolm , et al.4493326, Automatic blood pressure system with servo controlled inflation and deflation Issued on: 01/15/1985 Inventor: Hill , et al.4546777, Heart sound detector and synchronization for diagnostics Issued on: 10/15/1985 Inventor: Groch , et al.4549552, Heart sound detector and cardiac cycle data are combined for diagnostic reliability Issued on: 10/29/1985 Inventor: Groch , et al.4649930, Apparatus for beat buffering techniques varified by arrhythmias detection for stopaction frames of cardiac function Issued on: 03/17/1987 Inventor: Groch , et al.4672976, Heart sound sensor Issued on: 06/16/1987 Inventor: Kroll4680708, Method and apparatus for analyzing electrocardiographic signals Issued on: 07/14/1987 Inventor: Ambos , et al.4720866, Computerized stethoscopic analysis system and method Issued on: 01/19/1988 Inventor: Elias , et al.4781200, Ambulatory non-invasive automatic fetal monitoring system Issued on: 11/01/1988 Inventor: Baker4784154, Interference resistant biomedical transducer Issued on: 11/15/1988 Inventor: Shirley , et al.4792145, Electronic stethoscope system and method Issued on: 12/20/1988 Inventor: Eisenberg , et al.4803996, Cardiovascular monitor Issued on: 02/14/1989 Inventor: Peel , et al.4862361Methods and apparatus for monitoring cardiovascular regulation using heart rate power spectral analysis Issued on: 08/29/1989 Inventor: Gordon , et al. International ClassA61B 005/02 |
