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Continuous glucose monitoring and a system utilized therefor

  • US 4,979,509 A
  • Filed: 07/19/1989
  • Issued: 12/25/1990
  • Est. Priority Date: 07/19/1989
  • Status: Expired due to Fees
First Claim
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1. An in situ method of continuously monitoring the glucose level in the body of a patient including the steps of:

  • locating a filter member within the interior of a blood vessel for direct contact with blood therein;

    directing said blood within the vessel through the filter member for filtering a clear liquid component of the blood then in the vessel from the blood cells and proteins therein, said clear liquid component containing the glucose to be monitored;

    continuously passing said clear liquid component along a predetermined path outside the vessel and entirely within the body of the patient so that the clear liquid component does not leave the body of the patient;

    detecting an optical property of the clear component as it moves along said predetermined path; and

    employing information obtained regarding the detected optical property to determine the glucose level in the blood.

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