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ENDOSCOPE WITH BUILT-IN OXIMETER

  • US 3,690,769 A
  • Filed: 12/07/1970
  • Issued: 09/12/1972
  • Est. Priority Date: 12/12/1969
  • Status: Expired due to Term
First Claim
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1. An oximeter comprising, in combination:

  • a. an elongated flexible tube having an open front end and a rear end;

    b. two light conducting optical systems extending longitudinally in said tube and having respective front and rear end portions adjacent the corresponding ends of said tube;

    c. a light source communicating with the rear end portion of one of said systems, whereby light from said source may be radiated from the front end portion of said one system through said open front end;

    d. an objective in said front end in optical alignment with the front end portion of the other system;

    e. an eyepiece in said rear end in optical alignment with the rear end portion of said other system;

    f. a bag of pliable, transparent material secured to said front end;

    g. inflating means on said rear end communicating with said bag for inflating the same to a position in which said objective is enclosed by the inflated bag;

    h. detecting means for detecting light received by said rear end portion of said other system and for generating a signal indicative of the intensity of the detected light; and

    i. filter means for limiting the detected light to selected wave lengths in the red and infrared parts of the spectrum.

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