Non-invasive vascular waveform transducer and apparatus
Patent 4295471 Issued on October 20, 1981. Estimated Expiration Date: 
May 25, 1999. 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.
May 25, 1999. 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 References 3182129 3189023 3233041 3387149 3555187 3573394 3682161 3846585 InventorApplicationNo. 06/042415 filed on 05/25/1979US Classes:600/488, Pressure transducer structure381/67, STETHOSCOPES, ELECTRICAL600/500, Detecting blood vessel pulsation600/528, Detecting heart sound73/774Specified sensor structureExaminersPrimary: Howell, Kyle L.Attorney, Agent or FirmInternational ClassesA61B 5/022 (20060101)A61B 7/00 (20060101) A61B 7/04 (20060101) AbstractApparatus is disclosed herein for non-invasively monitoring arterial waveforms, such as the waveform produced by blood flow through the brachial artery in a human subject. The invention includes a unique transducer which senses both a pressure wave proportional to blood flow in the artery and an acoustical signal proportional to the turbulence created by blood flow through a partially occluded artery. The transducer may be cuff mounted for attachment to the subject, and the cuff may be automatically inflated in accordance with the invention. | |
