Blood gas monitoring sensors
First Claim
Patent Images
1. Colorimetric sensor for measurement of the amount of a chemical constituent dissolved in a fluid, comprising:
- a chamber containing a colorimetric dye means for changing light absorption characteristics in response to changes in the amount of said chemical constituent, for indicating the amount of said chemical constituent;
fiber optic means having a proximal end and a distal end for delivering light from the light source to said chamber and for carrying light reflected from said chamber to a means for monitoring light intensity, the distal end of said fiber optic means coupled to said chamber and exposed to said colorimetric dye means; and
reflective means distal to said dye means for reflecting light delivered to said chamber by said fiber optic means, said reflective means comprising a white reflective surface, perpendicular to the axis of said fiber optic means and spaced no more than about 0.004" from the distal end of said fiber optic means.
1 Assignment
0 Petitions
Accused Products
Abstract
Colorimetric, fiber optic sensors for measuring pH, PCO2 and/or other chemical parameters of the blood. The sensors are fabricated using a single optical fiber, which is provided with a chamber at its distal end containing a pH sensitive dye. Located distal to the chamber is a white reflective surface located within 0.04" from the end of the optical fiber, which enhances the performance of the sensor.
-
Citations
14 Claims
-
1. Colorimetric sensor for measurement of the amount of a chemical constituent dissolved in a fluid, comprising:
-
a chamber containing a colorimetric dye means for changing light absorption characteristics in response to changes in the amount of said chemical constituent, for indicating the amount of said chemical constituent; fiber optic means having a proximal end and a distal end for delivering light from the light source to said chamber and for carrying light reflected from said chamber to a means for monitoring light intensity, the distal end of said fiber optic means coupled to said chamber and exposed to said colorimetric dye means; and reflective means distal to said dye means for reflecting light delivered to said chamber by said fiber optic means, said reflective means comprising a white reflective surface, perpendicular to the axis of said fiber optic means and spaced no more than about 0.004" from the distal end of said fiber optic means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. Colorimetric sensor for measurement of the amount of a chemical constituent dissolved in a fluid, comprising:
-
a chamber containing a colorimetric dye means for changing light absorption characteristics in response to changes in the amount of said chemical constituent, said chamber comprising a tubular semipermeable membrane having a proximal end and a distal end and containing said colorimetric dye means; fiber optic means having a proximal end and a distal end for delivering light from the light source to said chamber and for carrying light reflected from said chamber to a means for monitoring light intensity, the distal end of said fiber optic means located within said tubular membrane and sealed to said tubular membrane, the distal end of said fiber optic means exposed to said colorimetric dye means; and a plug of reflective adhesive, located within the distal end of said tubular membrane and sealing to the distal end of said tubular membrane, and located distal to said colorimetric dye means. - View Dependent Claims (13, 14)
-
Specification