Reagent-less whole-blood glucose meter
First Claim
Patent Images
1. A reagentless glucose detection system sized and configured to be portably carried by a patient, comprising:
- a modulated source capable of emitting a beam of radiation;
a detector in an optical path of the beam;
a synchronous demodulator in communication with the detector;
a housing sized and configured to be portable and used by the patient, and to house the source and the detector;
a receptacle formed in said housing for manually receiving a sample element, the receptacle being sized and configured such that at least a portion of the sample element is situated in the optical path when the sample element is situated in the receptacle; and
a disposable sample element removably situated in the receptacle of the housing and constructed at least in part from a material through which the radiation can pass, the sample element comprising;
a sample cell wall having a non-negligible absorption of the radiation in a spectral band; and
a sample cell configured to be at least partially filled by the patient with a sample from the patient;
further comprising a filtering system in the optical path of the beam, the filtering system configured to transmit the spectral band of radiation;
wherein the filtering system is configured to transmit radiation at at least one of the following center wavelengths;
about 5.25 μ
m, about 6.12 μ
m, about 7.4 μ
m, about 8.0 μ
m, about 8.45 μ
m, about 9.25 μ
m, about 9.65 μ
m, about 10.4 μ
m, about 12.2 μ
m.
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Abstract
A reagentless whole-blood analyte detection system that is capable of being deployed near a patient has a source capable of emitting a beam of radiation that includes a spectral band. The whole-blood system also has a detector in an optical path of the beam. The whole-blood system also has a housing that is configured to house the source and the detector. The whole-blood system also has a sample element that is situated in the optical path of the beam. The sample element has a sample cell and a sample cell wall that does not eliminate transmittance of the beam of radiation in the spectral band.
133 Citations
17 Claims
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1. A reagentless glucose detection system sized and configured to be portably carried by a patient, comprising:
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a modulated source capable of emitting a beam of radiation; a detector in an optical path of the beam; a synchronous demodulator in communication with the detector; a housing sized and configured to be portable and used by the patient, and to house the source and the detector; a receptacle formed in said housing for manually receiving a sample element, the receptacle being sized and configured such that at least a portion of the sample element is situated in the optical path when the sample element is situated in the receptacle; and a disposable sample element removably situated in the receptacle of the housing and constructed at least in part from a material through which the radiation can pass, the sample element comprising; a sample cell wall having a non-negligible absorption of the radiation in a spectral band; and a sample cell configured to be at least partially filled by the patient with a sample from the patient; further comprising a filtering system in the optical path of the beam, the filtering system configured to transmit the spectral band of radiation; wherein the filtering system is configured to transmit radiation at at least one of the following center wavelengths;
about 5.25 μ
m, about 6.12 μ
m, about 7.4 μ
m, about 8.0 μ
m, about 8.45 μ
m, about 9.25 μ
m, about 9.65 μ
m, about 10.4 μ
m, about 12.2 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A reagentless analyte detection system capable of being deployed near a patient comprising:
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a modulated source capable of emitting (i) an analyte beam of radiation comprising a spectral band having a center wavelength, and (ii) a calibration beam of radiation; a detector in an optical path of the analyte beam; a synchronous demodulator in communication with the detector; a processor in communication with the detector, the processor configured to compare signals corresponding to the analyte beam and the calibration beam; a housing configured to house the source and the detector; a disposable sample element situated in the optical path of the analyte beam and in an optical path of the calibration beam, the sample element configured to be filled with a sample, the sample element comprising; a sample cell wall having a non-negligible absorption of the radiation in a spectral band; and a sample cell; and a filtering system in the optical path of the analyte beam, the filtering system configured to transmit radiation at at least one of the following center wavelengths;
about 5.25 μ
μ
m, about 6.12 μ
m, about 7.4 μ
m, about 8.0 μ
m, about 8.45 μ
m, about 9.25 μ
m, about 9.65 μ
m, about 10.4 μ
m, about 12.2 μ
m. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification