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Method and apparatus for monitoring blood components

  • US 4,810,090 A
  • Filed: 08/24/1987
  • Issued: 03/07/1989
  • Est. Priority Date: 08/24/1987
  • Status: Expired due to Term
First Claim
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1. A method of monitoring concentration of components of blood flowing in a flowpath comprisingflowing said components through a transparent channel,directing light to said channel along an axis intersecting said channel,detecting light passing through said channel along said axis with a central detector,detecting light scattered off of said axis with an annular detector, anddetermining condition of components based on said light passing along said axis and/or said light scattered off said axis,said determining involving using said central detector to determine concentration in a low range of concentration values and said annular detector to determine concentration in a high range of concentration values.

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