Laser diode optical transducer assembly for non-invasive spectrophotometric blood oxygenation

Abstract

An infrared spectrometric monitoring transducer includes a shielded cable, a fiber optic light guide, a transducer housing, a light source, and at least one light detector. The light source is mounted in the transducer housing and is operable to produce a light signal along a plurality of discrete wavelengths. The at least one light detector is mounted in the housing and is operable to receive light energy corresponding to the light signal. The at least one light detector is mounted in the transducer housing spaced a distance apart from the light source along a straight line extending the light source and the at least one light detector. The shielded cable and the fiber optic light guide are disposed adjacent the light source and the transducer has an “L” shape formed by the shielded cable and the fiber optic light guide extending outwardly from the transducer housing in a direction substantially perpendicular to the line between the extending the light source and the at least one light detector.

1 . An infrared spectrometric monitoring transducer, comprising: 
 a shielded cable;    a fiber optic light guide;    a transducer housing;    a light source operable to produce a light signal along a plurality of discrete wavelengths, mounted in the transducer housing;    at least one light detector operable to receive light energy corresponding to the light signal, mounted in the transducer housing spaced a distance apart from the light source along a straight line extending the light source and the at least one light detector;    wherein the shielded cable and the fiber optic light guide are disposed adjacent the light source and the transducer has an “L” shape formed by the shielded cable and the fiber optic light guide extending outwardly from the transducer housing in a direction substantially perpendicular to the line between the extending the light source and the at least one light detector.    
     
     
         2 . The transducer of  claim 1 , wherein the housing includes one or more recessed cutouts disposed between the light source and the at least one light detector.  
     
     
         3 . The transducer of  claim 1  further comprising an adhesive pad attached to the housing.  
     
     
         4 . The transducer of  claim 3 , wherein the adhesive pad includes openings for the light source and the at least one light detector.  
     
     
         5 . The transducer of  claim 1  wherein the housing includes an adhesive applied to one surface.