System and method for noninvasive detection of arterial stenosis
Patent 5638823 Issued on June 17, 1997. Estimated Expiration Date: 
August 28, 2015. Estimated 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.
August 28, 2015. Estimated 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.Patent ReferencesDynamic spectral phonocardiograph Noninvasive diagnostic system for coronary artery disease Intelligent stethoscope Risk management system for use with cardiac patients Patent #: 5276612 InventorsAssigneeApplicationNo. 520236 filed on 08/28/1995US Classes:600/528, Detecting heart sound600/501, Waveform graph-type pulse recorder600/526Blood output per beat or time intervalExaminersPrimary: Nasser, Robert L.Attorney, Agent or FirmInternational ClassA61B 005/00AbstractA system and method for noninvasively detecting coronary artery disease. The system and method utilize a vasodilator drug to increase the signal-to-noise ratio of an acoustic signal that represents diastolic heart sounds of a patient. A wavelet transform is performed on the acoustic signal to provide parameters for a feature vector. Scaled clinical examination parameters such as a patient's sex, age, body weight, smoking condition, blood pressure, and family history are also included in the feature vector. The feature vector is used as an input pattern to neural networks. The output of the neural networks represent a diagnosis of coronary stenosis in a patient.Other References
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