Patents Assigned to Inomet, Inc.
  • Blood constituent measurement
    Patent number: 5179951
    Abstract: An apparatus and method are disclosed for determining a level of a constituent such as glucose in a body fluid such as blood. The apparatus and method utilize a light generator for generating a testing light of known intensity with the testing light including a wavelength absorbable by the constituent being measured. The light generator also generates a reference light of known intensity having a wavelength not absorbable by the constituent being measured. The testing light and reference light are directed toward a fluid containing an unknown concentration of a constituent. A light detector is provided for measuring the intensity of the testing light and reference light being spectrally modified by the fluid. A light path distance measurer is provided for measuring a distance of a light path traveled by the testing light and reference light.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: January 19, 1993
    Assignee: Inomet, Inc.
    Inventor: Mark B. Knudson
  • Body fluid constituent measurement utilizing an interference pattern
    Patent number: 5146091
    Abstract: An apparatus is disclosed for measuring a body fluid constituent. In a preferred embodiment, the apparatus directs light against a tissue containing the constituent and detects an amount of light absorption in a reflected light from said tissue. The amount of absorption is analyzed to determine the amount of constituent in the blood within the tissue.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: September 8, 1992
    Assignee: Inomet, Inc.
    Inventor: Mark B. Knudson
  • Testing of body fluid constituents through measuring light reflected from tympanic membrane
    Patent number: 5115133
    Abstract: An apparatus and method are disclosed for determining a level of a constituent such as glucose in a body fluid such as blood. The apparatus and method utilize a light generator for generating a testing light of known intensity with the testing light including a wavelength absorbable by the constituent being measured. The light generator also generates a reference light of known intensity having a wavelength not absorbable by the constituent being measured. The testing light and reference light are directed toward a fluid containing an unknown concentration of a constituent. A light detector is provided for measuring the intensity of the testing light and reference light being spectrally modified by the fluid. A light path distance measurer is provided for measuring a distance of a light path traveled by the testing light and reference light.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: May 19, 1992
    Assignee: Inomet, Inc.
    Inventor: Mark B. Knudson
  • Invasive FTIR blood constituent testing
    Patent number: 5079421
    Abstract: An apparatus is disclosed for measuring a blood constituent. In a preferred embodiment, the apparatus includes a semipermeable membrane for defining a volume with a flexible membrane disposed on one end and with a light source disposed on an opposite end. The flexible membrane flexes to become the moving mirror in an FTIR system.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: January 7, 1992
    Assignee: Inomet, Inc.
    Inventors: Mark B. Knudson, James E. Shapland