Apparatus and method for continuously measuring volumetric blood flow using multiple transducer and catheter for use therewith
Patent 4947852 Issued on August 14, 1990. Estimated Expiration Date: 
October 5, 2008. 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.
October 5, 2008. 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 3542014 Volumetric flow rate determination in conduits not directly accessible Blood flow measurement catheter Ultra-thin acoustic transducer and balloon catheter using same in imaging array subassembly Patent #: 4841977 InventorsApplicationNo. 254317 filed on 10/05/1988US Classes:600/465, Blood flow measurement600/469Detecting emboliExaminersPrimary: Jaworski, Francis J.Attorney, Agent or FirmInternational ClassA61B 008/12AbstractApparatus for measuring volumetric flow of a liquid in a vessel having a wall and having an axis extending longitudinally of the vessel parallel to the vessel wall. A flexible catheter is adapted to be disposed in the vessel. First and second ultrasonic transducers are carried by the catheter on one side of the catheter and face the wall of the vessel so that the beams from the transducers each cross substantially the longitudinal axis of the vessel. The first transducer beam is inclined at an angle with respect to the longitudinal axis of the vessel. The second transducer beam is inclined in a direction which is generally perpendicular to the longitudinal axis of the vessel.Other References
Field of SearchReflection or scattering of acoustic waves | |
