Screening method for red cell abnormality
December 2, 2003. 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 3686486 Process for automatic counting and measurement of particles Hematocrit measurement in an automatic hematology analyzer Apparatus for counting and classifying particles Technique for simultaneous particle size and velocity measurement Pulse edge measurement for determining particle dimensional characteristics Method and apparatus for measuring mean cell volume of red blood cells Patent #: 4453266 InventorsAssigneeApplicationNo. 06/557689 filed on 12/02/1983US Classes:356/336, By particle light scattering356/39, BLOOD ANALYSIS377/11, Including particle size determination variations702/21, Cell count or shape or size analysis (e.g., blood cell)702/26By particle countExaminersPrimary: McGraw, Vincent P.Assistant: Thompson, III, Robert D. V. Attorney, Agent or FirmInternational ClassesG01N 15/14 (20060101)G01N 15/00 (20060101) AbstractRed cell samples are passed through a zone of focused illumination, and a scatter vs. time pulse is obtained for each. Each pulse is analyzed for pulse width, pulse area, and pulse shape. These parameters are respectively collected, and three coefficients of variation are obtained for each such collection. In addition to these three abnormality factors, the mean of the pulse shape collection constitutes a fourth. The four are respectively subject to statistical criteria, and are combined in predetermined fashion for a single red cell morphology index. | |
