Layered spectroscopic sample element with microporous membrane
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Abstract
A spectroscopic sample holder comprises a microporous sheet. The microporous sheet has a top surface, a bottom surface substantially parallel to the top surface, and at least one side surface oriented substantially perpendicular to the top and bottom surfaces. The side surface forms an exposed transit opening configured to contact a material sample and distribute the contacted material sample into the microporous sheet. The spectroscopic sample holder further comprises a first planar support member positioned on, and substantially parallel to, the top surface of the microporous sheet. The spectroscopic sample holder further comprises a second planar support member positioned on the bottom surface of the microporous sheet, and oriented substantially parallel to the first planar support member.
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Citations
159 Claims
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1-137. -137. (canceled)
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138. An analyte detection system for determining the concentration of analyte in a biological fluid sample drawn from a patient, the system comprising:
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a near patient optical detection system comprising;
a source configured to emit electromagnetic radiation, and a detector positioned in an optical path of the radiation;
a sample element configured for removable 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 highly transmissive of infrared radiation, and a sample supply passage extending from and in fluid communication with the sample cell; and
a sample extractor comprising a skin-piercing member, the skin piercing member having a passageway that connects a distal portion of the skin-piercing structure with the sample supply passage of the sample element;
whereby the detection system performs optical analysis on the biological fluid sample to assess the concentration of at least one constituent of the biological fluid sample. - View Dependent Claims (139, 140, 141, 142, 143, 144, 145, 146, 147)
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148. An analyte detection system for determining the concentration of analyte in a biological fluid sample drawn from a patient, the system comprising:
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a source configured to emit electromagnetic radiation;
a detector positioned to receive at least a portion of the electromagnetic radiation emitted from the source;
a sample element configured to hold the biological fluid sample in a sample cell that is defined by a window, wherein the window is highly transmissive of infrared radiation;
a sample supply passage extending from a skin-piercing structure to the sample cell; and
a filter positioned in the sample supply passage to filter the biological fluid sample;
wherein the detection system performs optical analysis on the biological fluid sample to assess the concentration of at least one constituent of the biological fluid sample. - View Dependent Claims (149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159)
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Specification