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Method of measuring ingredients in liquid

  • US 5,486,478 A
  • Filed: 12/14/1994
  • Issued: 01/23/1996
  • Est. Priority Date: 03/23/1990
  • Status: Expired due to Term
First Claim
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1. A method of measuring ingredients in a body fluid, said method comprising the steps of:

  • rotating a valve having a bore therein which forms a reservoir with a fixed volume for receiving a prescribed amount of said body fluid;

    placing said bore in communication with an intake port and a suction port of a housing for taking said prescribed amount of said body fluid from said intake port and into the bore in said valve;

    rotating said valve a second time to place said bore in communication with an introduction port for introducing a diluent into said bore and into a cell having a stirrer and a sensor therein, said cell having a discharge port, said second rotation of said valve occurring when said bore is filled with said prescribed amount of said body fluid;

    transferring a sample of said prescribed amount of said body fluid from said bore and into said cell by a pressing force occurring with the introduction of said diluent into said bore;

    diluting said prescribed amount of said body fluid with said diluent along with a stirring by said stirrer;

    measuring a concentration of ingredients in said diluted body fluid by said sensor for detecting the ingredients, while said diluted body fluid is being stirred in said cell;

    pouring a diluent into said cell through a port thereof and discharging said measured and diluted body fluid out of said cell; and

    repeating the above steps in the named order.

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