Apparatus, system and method for measuring spatial average velocity and/or volumetric flow of blood in a vessel
Patent 4967753 Issued on November 6, 1990. Estimated Expiration Date: 
January 13, 2009. 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.
January 13, 2009. 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 ReferencesUltrasonic diagnostic apparatus Torsionally stabilized guide wire with outer jacket Floppy guide wire with opaque tip Steerable guidewire with deflectable tip Patent #: 4815478 InventorsApplicationNo. 297111 filed on 01/13/1989US Classes:600/468, With blood flow measurement or detection600/463, With acoustical or display imaging600/465, Blood flow measurement600/585Flexible catheter guideExaminersPrimary: Jaworski, Francis J.Attorney, Agent or FirmInternational ClassA61B 008/12AbstractSystem for measuring a characteristic of flow of liquid in a vessel of a patient comprising a transducer positioned in a vessel in a patient for supplying ultrasonic energy. The transducer produces a substantially uniform beam which encompasses the vessel. The transducer receives ultrasonic energy back scattered from the red blood cells and provides an electrical output signal. A first moment detector is provided which receives the electrical output from the transducer and provides a first moment signal. Normalization is provided to the output of the first moment detector to provide an electrical output representing a characteristic of the flow of the liquid in the vessel.Field of SearchInserted in vascular system | |
