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Configuration fiber-optic blood gas sensor bundle and method of making

  • US 5,047,627 A
  • Filed: 05/18/1990
  • Issued: 09/10/1991
  • Est. Priority Date: 05/18/1990
  • Status: Expired due to Term
First Claim
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1. A multi-analyte sensor comprising:

  • (a) a first, a second, and a third optical fiber, each optical fiber having a longitudinal axis and a distal end, the longitudinal axis corresponding to the direction that a light signal propagates through said optical fibers, all of said optical fibers being arranged in a sheath such that their longitudinal axes are substantially parallel, said sheath terminating short of the distal ends of the optical fibers, leaving an exposed portion of each optical fiber extending beyond the sheath, only two of the optical fibers being bonded together up to and around their distal ends, the distal ends of the optical fibers forming a mutually supporting array;

    (b) a first indicator matrix containing a first indicator molecule, disposed adjacent to said first optical fiber, said first indicator molecule exhibiting a first signal in response to light at a first wavelength to an extent that depends upon a first analyte concentration around the sensor;

    (c) a second indicator matrix containing a second indicator molecule, disposed adjacent to said second optical fiber, said second indicator molecule exhibiting a second signal in response to light at a second wavelength to an extent that depends upon a second analyte concentration around the sensor; and

    (d) a third indicator matrix containing a third indicator molecule, disposed adjacent said third optical fiber, said third indicator molecule exhibiting a third signal in response to light of a third wavelength to an extent that depends upon a third analyte concentration around the sensor, wherein said mutually supporting array minimizes breakage of any of the optical fibers and indicator matrices due to handling.

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