Method and arrangement for measuring the concentration of gases
First Claim
2. β
- -methyl-umbelliferon..]. 6. The arrangement of claim .[.2.]. .Iadd.33.Iaddend., wherein the indicating substance is Pyrene-butyric
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Accused Products
Abstract
A method and an arrangement for measuring the concentration of gases in a sample includes the generation of a monochromatic light beam having predetermined color characteristic. An indicator generates light signals indicative of the concentration of the gases in a sample to be measured and includes a light-transmissive surface positioned to be impinged by the monochromatic light beam, a diffusion membrane adapted to be placed in the proximity of a sample and being permeable to a selected gas component thereof, and an indicating substance positioned to be impinged by the monochromatic light beam penetrating the light-transmissive surface and by the gas component penetrating the diffusion membrane. The indicating substance reacts when illuminated by the incident monochromatic light by emitting a resultant light beam having an emitted component which has a color characteristic different from the predetermined color characteristic of the monochromatic light beam. The resultant light beam is conducted away from the indicating substance through the light-transmissive surface. Finally, the emitted component is discriminated from the resultant light beam so that the change in the color characteristic of the indicating substance can be measured and correlated with the concentration of gases in the sample.
148 Citations
29 Claims
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2. β
- -methyl-umbelliferon..]. 6. The arrangement of claim .[.2.]. .Iadd.33.Iaddend., wherein the indicating substance is Pyrene-butyric
- View Dependent Claims (1, 3, 4, 5, 6, 8, 9, 11, 14, 16)
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20. of said emitted light components. .Iadd.28. A method of measuring at least the pH value of a sample comprising the steps of generating a light beam having a predetermined color characteristic;
- generating light signals indicative of the pH value of a sample to be measured by positioning an indicator having a light-transmissive surface positioned to be impinged by said light beam, a diffusion membrane adapted to be placed in the proximity of a sample and being selectively permeable to a component of the sample which will allow a pH measurement of the sample to be made, and a pH indicating substance which is capable of fluorescing positioned to be impinged by the light beam penetrating said light-transmissive surface and by said component penetrating said diffusion membrane, said pH indicating substance responding when illuminated by said incident light beam by emitting a resultant light beam having a fluorescent emitted component which has a color characteristic different from said predetermined color characteristic and is related to the pH value of the sample;
conducting said resultant light beam away from said indicating substance through said light-transmissive surface; and
discriminating said emitted component from said resultant light beam so that the change in the color characteristic of said indicating substance can be measured and correlated with the pH - View Dependent Claims (10, 15)
- generating light signals indicative of the pH value of a sample to be measured by positioning an indicator having a light-transmissive surface positioned to be impinged by said light beam, a diffusion membrane adapted to be placed in the proximity of a sample and being selectively permeable to a component of the sample which will allow a pH measurement of the sample to be made, and a pH indicating substance which is capable of fluorescing positioned to be impinged by the light beam penetrating said light-transmissive surface and by said component penetrating said diffusion membrane, said pH indicating substance responding when illuminated by said incident light beam by emitting a resultant light beam having a fluorescent emitted component which has a color characteristic different from said predetermined color characteristic and is related to the pH value of the sample;
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22. of carbon dioxide in the sample. .Iaddend. .Iadd.32. A method as defined in claim 31 wherein said indicating substance includes a pH indicating substance. .Iaddend. .Iadd.33. In an arrangement for measuring the concentration of gases in a sample, a combination comprising means for generating a monochromatic light beam having a predetermined color characteristic;
- indicating means for generating light signals indicative of the concentration of gases in a sample to be measured, including a light transmissive surface positioned to be impinged by said monochromatic light beam, a diffusion membrane of silicone adapted to be placed in proximity of a sample and being permeable to a selected gas component thereof, and an indicating substance sealingly embedded throughout said diffusion membrane and positioned to be impinged by said monochromatic light beam penetrating said light-transmissive surface and by said gas component penetrating said diffusion membrane, said indicating substance reacting when illuminated by said incident monochromatic light beam by emitting a resultant light beam having an emitted component which has a color characteristic different from said predetermined color characteristic;
means for conducting said resulting light beam away from said indicating substance through said light transmissive surface; and
means for discriminating said emitted component from said resultant light beam so that the change in the color characteristic of said indicating substance can be measured and correlated with the concentration of gases
- indicating means for generating light signals indicative of the concentration of gases in a sample to be measured, including a light transmissive surface positioned to be impinged by said monochromatic light beam, a diffusion membrane of silicone adapted to be placed in proximity of a sample and being permeable to a selected gas component thereof, and an indicating substance sealingly embedded throughout said diffusion membrane and positioned to be impinged by said monochromatic light beam penetrating said light-transmissive surface and by said gas component penetrating said diffusion membrane, said indicating substance reacting when illuminated by said incident monochromatic light beam by emitting a resultant light beam having an emitted component which has a color characteristic different from said predetermined color characteristic;
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23. in the sample. .Iaddend. .Iadd.34. In an arrangement for measuring the concentration of carbon dioxide in a sample, a combination comprising means for generating a light beam having a predetermined color characteristic;
- indicating means for generating light signals from which the concentration of carbon dioxide in a sample to be measured can be determined, including a light transmissive surface positioned to be impinged by said light beam, a diffusion membrane adapted to be placed in proximity of a sample and being permeable to at least a carbon dioxide component thereof, and an indicating substance which is capable of fluorescing positioned to be impinged by said light beam penetrating said light-transmissive surface and by said carbon dioxide component penetrating said diffusion membrane, said indicating substance responding when illuminated by said incident light beam by emitting a resultant light beam having a fluorescent emitted component which has a color characteristic different from said predetermined color characteristic and is related to the concentration of carbon dioxide in the sample;
means for conducting said resulting light beam away from said indicating substance through said light transmissive surface;
means for discriminating said emitted component from said resultant light beam so that the change in the color characteristic of said indicating substance can be ascertained and means for correlating the change in the color characteristic with the concentration of carbon dioxide in the sample. .Iaddend. .Iadd.35. A method as defined in claim 34 wherein said indicating substance includes a
- indicating means for generating light signals from which the concentration of carbon dioxide in a sample to be measured can be determined, including a light transmissive surface positioned to be impinged by said light beam, a diffusion membrane adapted to be placed in proximity of a sample and being permeable to at least a carbon dioxide component thereof, and an indicating substance which is capable of fluorescing positioned to be impinged by said light beam penetrating said light-transmissive surface and by said carbon dioxide component penetrating said diffusion membrane, said indicating substance responding when illuminated by said incident light beam by emitting a resultant light beam having a fluorescent emitted component which has a color characteristic different from said predetermined color characteristic and is related to the concentration of carbon dioxide in the sample;
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24. pH indicating substance. .Iaddend. .Iadd.36. In an arrangement for measuring at least one of the characteristics of a sample wherein the sample characteristics consist essentially of the pH value and the concentration of gases in the sample, a combination comprising means for generating a light beam having a predetermined color characteristic;
- indicating means for generating light signals indicative of the sample characteristic to be measured, including a light transmissive surface positioned to be impinged by said light beam, a selectively permeable diffusion membrane of silicone adapted to be placed in proximity of a sample and being permeable to a component thereof, and an indicating substance in said diffusion membrane and positioned to be impinged by said light beam penetrating said light-transmissive surface and by said component penetrating said diffusion membrane, said indicating substance being capable of fluorescing and reacting when illuminated by said incident light beam by emitting a resultant light beam having a fluorescent emitted component which has a color characteristic different from said predetermined color characteristic;
means for conducting said resultant light beam away from said indicating substance through said light transmissive surface; and
means for discriminating said emitted component from said resultant light beam so that the change in the color characteristic of said indicating substance can be measured and correlated - View Dependent Claims (7, 12, 13, 17, 18)
- indicating means for generating light signals indicative of the sample characteristic to be measured, including a light transmissive surface positioned to be impinged by said light beam, a selectively permeable diffusion membrane of silicone adapted to be placed in proximity of a sample and being permeable to a component thereof, and an indicating substance in said diffusion membrane and positioned to be impinged by said light beam penetrating said light-transmissive surface and by said component penetrating said diffusion membrane, said indicating substance being capable of fluorescing and reacting when illuminated by said incident light beam by emitting a resultant light beam having a fluorescent emitted component which has a color characteristic different from said predetermined color characteristic;
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25. with the sample characteristic to be measured. .Iaddend. .Iadd.37. An arrangement as defined in claim 36 wherein the indicating substance is mixed with the membrane. .Iaddend. .Iadd.38. An arrangement as defined in claim 36 including an absorption surface facing said indicating substance and being between the indicating substance and the sample. .Iaddend. .Iadd.39. An arrangement as defined in claim 36 including a reflective surface facing said indicating substance and being between the indicating substance and the sample. .Iaddend. .Iadd.40. An arrangement as defined in claim 36 wherein said indicating substance is sealingly embedded throughout said diffusion membrane. .Iaddend. .Iadd.41. An arrangement as defined in claim 40 wherein the membrane includes a polymer and said polymer is mixed with the indicating substance. .Iaddend. .Iadd.42. An arrangement as defined in claim 36 wherein said membrane is permeable to a component of the sample which will allow a pH measurement of the blood to be made and said indicating substance is a pH indicating substance.
- 26. Iaddend. .Iadd.43. An arrangement as defined in claim 42 wherein said indicating substance is sealingly embedded throughout said diffusion membrane and said membrane includes a polymer and said polymer is mixed with the indicating substance. .Iaddend. .Iadd.44. An arrangement as defined in claim 36 wherein said membrane is permeable to at least a carbon dioxide component of the sample and said predetermined color characteristic is related to the concentration of carbon dioxide in the sample. .Iaddend. .Iadd.45. An arrangement as defined in claim 44 wherein said indicating substance is sealingly embedded throughout said diffusion membrane and said membrane includes a polymer and said polymer is mixed
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27. with the indicating substance. .Iaddend. .Iadd.46. In an arrangement for measuring the concentration of gases in a sample, a combination comprising means for generating a monochromatic light beam having a predetermined color characteristic;
- indicating means for generating light signals indicative of the concentration of gases in a sample to be measured, including a light transmissive surface positioned to be impinged by said monochromatic light beam, a diffusion membrane adapted to be placed in proximity of a sample and being permeable to a selected gas component thereof, and an indicating substance sealingly embedded throughout said diffusion membrane and positioned to be impinged by said monochromatic light beam penetrating said light-transmissive surface and by said gas component penetrating said diffusion membrane, said indicating substance reacting when illuminated by said incident monochromatic light beam by emitting a resultant light beam having an emitted component which has a color characteristic different from said predetermined color characteristic;
means for conducting said resulting light beam away from said indicating substance through said light transmissive surface; and
means for discriminating said emitted component from said resultant light beam so that the change in the color characteristic of said indicating substance can be measured and correlated with the concentration of gases in the sample, said indicating substance being betamethyl-umbelliferone.
- indicating means for generating light signals indicative of the concentration of gases in a sample to be measured, including a light transmissive surface positioned to be impinged by said monochromatic light beam, a diffusion membrane adapted to be placed in proximity of a sample and being permeable to a selected gas component thereof, and an indicating substance sealingly embedded throughout said diffusion membrane and positioned to be impinged by said monochromatic light beam penetrating said light-transmissive surface and by said gas component penetrating said diffusion membrane, said indicating substance reacting when illuminated by said incident monochromatic light beam by emitting a resultant light beam having an emitted component which has a color characteristic different from said predetermined color characteristic;
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28. Iaddend. .Iadd.47. In an apparatus for measuring at least one of the characteristics of blood within a body wherein the sample characteristics consist essentially of the pH value and the concentration of gases in the blood, a combination comprising:
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means for generating a light beam having a predetermined color characteristic; a catheter receivable in a vein or artery and having a distal end, said catheter including indicating means for generating light signals indicative of the sample characteristic to be measured and a light-conductive cable means having an input end for conducting the light beam from the input end to the indicating means; said indicating means including a light-transmissive surface positioned to be impinged by said light beam, a diffusion membrane permeable to a selected component of the blood, and an indicating substance which fluoresces positioned to be impinged by said light beam penetrating said light-transmissive surface and by said component penetrating said diffusion membrane, each of said light-transmissive surface, diffusion membrane and indicating substance being near said distal end of said catheter, said indicating substance being in said diffusion membrane and responding when illuminated by said incident light beam by emitting a resultant light beam having a fluorescent emitted component which has a predetermined color characteristic different from said predetermined color characteristic, said catheter including light conductive cable means for conducting said resulting light beam away from said indicating substance; and means for discriminating said emitted component from said resultant light beam received from said last-mentioned light conductive cable means so that the change in the predetermined color characteristic of said indicating substance can be measured and correlated with the sample characteristic to be measured. .Iaddend. .Iadd.48. An apparatus as defined in claim 47 wherein the membrane includes a polymer and said polymer is - View Dependent Claims (21)
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29. mixed with the indicating substance. .Iaddend. .Iadd.49. An apparatus as defined in claim 47 wherein the membrane includes silicone. .Iaddend. .Iadd.50. In an apparatus for measuring at least one of the characteristics of blood within a body wherein the sample characteristics consist essentially of the pH value and the concentration of gases in the blood, a combination comprising:
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means for generating a light beam having a predetermined color characteristic; a catheter receivable in a vein or artery and having a distal end, said catheter including indicating means for generating light signals indicative of the sample characteristic to be measured and a light-conductive cable means having an input end for conducting the light beam from the input end to the indicating means; said indicating means including a light-transmissive surface positioned to be impinged by said light beam, a diffusion membrane permeable to a selected component of the blood, and an indicating substance which fluoresces positioned to be impinged by said light beam penetrating said light-transmissive surface and by said component penetrating said diffusion membrane, each of said light-transmissive surface, diffusion membrane and indicating substance being near said distal end of said catheter, said indicating substance responding when illuminated by said incident light beam by emitting a resultant light beam having a fluorescent emitted component which has a predetermined color characteristic different from said predetermined color characteristic, said catheter including light conductive cable means for conducting said resulting light beam away from said indicating substance; and means for discriminating said emitted component from said resultant light beam received from said last-mentioned light conductive cable means so that the change in the predetermined color characteristic of said indicating substance can be measured and correlated with the sample characteristic to be measured. .Iaddend. .Iadd.51. An apparatus for measuring at least one of the characteristics of blood within a body wherein the sample characteristics consist essentially of the pH value and the concentration of gases in the blood, the apparatus is adapted to receive a light beam having a predetermined color characteristic and is coupled to provide an optical signal to discriminating means, said apparatus comprising; indicating means for generating light signals indicative of the sample characteristic to be measured; a light-conductive cable means having an input end for receiving the light beam and conducting the light beam to the indicating means; said indicating means including a light-transmissive surface positioned to be impinged by said light beam, a diffusion membrane permeable to a selected component of the blood, an indicating substance which fluoresces positioned to be impinged by said light beam penetrating said light-transmissive surface and by said component penetrating said diffusion membrane, said apparatus being receivable in a vein or artery and having a distal end, each of said light-transmissive surface, diffusion membrane and indicating substance being near said distal end of said apparatus, said indicating substance responding when illuminated by said incident light beam by emitting a resultant light beam having a fluorescent emitted component which has a color characteristic different from said predetermined color characteristic; and 1ight conductive cable means for conducting said resulting light beam away from said indicating substance to the light discriminating means whereby the light discriminating means can discriminate said emitted component from said resultant light beam so that the change in the color characteristic of said indicating substance can be measured and correlated with the sample characteristic to be measured. .Iaddend. .Iadd.52. An apparatus as defined in claim 51 wherein said membrane is permeable to a component of the blood which will allow a pH measurement of the blood to be made and said indicating substance is a pH indicating substance. .Iaddend. .Iadd.53. An apparatus as defined in claim 51 wherein said membrane is permeable to at least a carbon dioxide component of the blood and said predetermined color characteristic is related to the concentration of carbon dioxide in the blood. .Iaddend. .Iadd.54. An apparatus as defined in claim 51 including an absorption surface facing said indicating substance and being between the indicating substance and the blood. .Iaddend. .Iadd.55. An apparatus as defined in claim 51 including a reflective surface facing said indicating substance and being between the indicating substance and the blood. .Iaddend.
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Specification