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
ApplicationNo. 06/557689 filed on 12/02/1983
US 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 count
ExaminersPrimary: McGraw, Vincent P.
Assistant: Thompson, III, Robert D. V.
Attorney, Agent or Firm
International 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.