Device and method for in vitro determination of analyte concentrations within body fluids
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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.
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Citations
116 Claims
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1-96. -96. (canceled)
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97. An apparatus for determining the concentration of an analyte in a biological fluid sample drawn from a patient, the apparatus comprising:
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an optical detection system comprising;
a source of electromagnetic radiation;
a detector;
an optical path extending between the source and the detector; and
a filter in the optical path, the filter configured to allow passage of at least one of the following wavelengths emitted by the source;
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 10.4 μ
m, about 12.2 μ
m; and
a removable sample element configured for engagement with the optical detection system, the sample element comprising;
a sample cell configured to hold the biological fluid sample, the sample cell being located in the optical path upon engagement of the sample cell with the optical detection system, the sample cell being defined by at least one window which is transmissive of infrared radiation;
a sample supply passage extending from and in fluid communication with the sample cell;
wherein the apparatus further comprises a sample extractor configured to draw the biological fluid sample from the patient, and the sample supply passage is configured to conduct the biological fluid sample into the sample cell. - View Dependent Claims (98, 99, 100, 101, 102, 103, 104, 105, 106, 107)
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108. A method for determining the concentration of an analyte in a biological fluid sample from a patient, the method comprising:
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emitting infrared electromagnetic radiation along an optical path;
passing the electromagnetic radiation through a filter, wherein the electromagnetic radiation passing through the filter has at least one of the following 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 10.4 μ
m, about 12.2 μ
m;
drawing the biological fluid sample from the patient with a sample extractor;
passing the biological fluid sample from the sample extractor through a sample supply passage of a sample element into a sample cell of the sample element;
holding a biological fluid sample in the sample cell such that the sample cell is located in the optical path; and
passing the infrared electromagnetic radiation through the sample cell and biological fluid sample. - View Dependent Claims (109, 110, 111, 112, 113, 114, 115, 116)
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Specification