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Apparatus for determining percentage oxygen-saturation of blood

  • US 2,706,927 A
  • Filed: 08/04/1949
  • Issued: 04/26/1955
  • Est. Priority Date: 08/04/1949
  • Status: Expired due to Term
First Claim
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5. A DEVICE FOR OBTAINING IN VIVO THE SPECTRAL TRANSMISSION OF BLOOD AND TISSUE AND OF THE TISSUE WHEN BLOOD IS SUBSTANTIALLY EXCLUDED THEREFROM COMPRISING A FRAME HAVING SUPPORTED THEREON PHOTO RESPONSIVE MEANS INCLUDING A LIGHT RECEIVING MECHANICAL SUPPORT SURFACE LIGHT SOURCE MEANS ON THE FRAME FOR PROJECTING A BEAM OF LIGHT TOWARD SAID SURFACE SO AS TO BE RECEIVED THEREON, MEANS MOUNTED ON THE FRAME FOR MOVEMENT TOWARD AND AWAY FROM SAID SURFACE FOR LIGHTLY HOLDING TISSUE IN VIVO MECHANICALLY BETWEEN SAID MEANS AND SAID SURFACE IN A POSITION THAT LIGHT WILL PASS THROUGH SAID TISSUE IN VIVO AND BE RECEIVED ON SAID SUFACE, MEANS ON SAID FRAME FOR COMPRESSING SAID TISSUE WHILE IT IS THUS MECHANICALLY HELD SO THAT BLOOD IS SUBSTANTIALLY EXCLUDED FROM SAID TISSUE WHILE LIGHT IS PASSED THERETHROUGH ONTO SAID SURFACE, SAID PHOTO RESPONSIVE MEANS BEING LOCATED SO AS TO BE ACTIVATED BY LIGHT PASSING THROUGH THE TISSUE AND RECEIVED ON SAID SURFACE.

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