Blood glucose measurement for small blood volume
First Claim
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1. A system for detecting at least one analyte in a body fluid, the system comprising:
- at least one test element comprising a test panel configured to detect the at least one analyte;
at least one lancet configured to generate a body fluid sample of less than 1 μ
l;
an actuator configured to incite the at least one lancet;
at least one transfer device configured to transfer a whole or partial volume of the body fluid sample generated by the at least one lancet to the at least one test element in a transfer time of less than 1 second; and
a measurement device configured to detect the at least one analyte, configured to detect an actual sample volume of the body fluid sample generated by the at least one lancet including a volume of the body fluid sample transferred to the at least one test element, configured to correct a measured value of the at least one analyte taking into account the actual sample volume, and configured to at least partially compensate changes in concentration to the measured value of the at least one analyte taking into account evaporation effects dependent on sample volume, wherein the measurement device comprises at least one sensor for detecting the actual sample volume.
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Abstract
A system is proposed for detection of at least one analyte in a body fluid, in particular for detection of blood glucose. The system is designed to generate a sample of the body fluid and to transfer at least some of the sample to at least one test element, in particular a test panel. The system is designed such that a time period between the generation of the sample and the application to the test element is less than 1 second, preferably less than 500 ms.
43 Citations
15 Claims
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1. A system for detecting at least one analyte in a body fluid, the system comprising:
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at least one test element comprising a test panel configured to detect the at least one analyte; at least one lancet configured to generate a body fluid sample of less than 1 μ
l;an actuator configured to incite the at least one lancet; at least one transfer device configured to transfer a whole or partial volume of the body fluid sample generated by the at least one lancet to the at least one test element in a transfer time of less than 1 second; and a measurement device configured to detect the at least one analyte, configured to detect an actual sample volume of the body fluid sample generated by the at least one lancet including a volume of the body fluid sample transferred to the at least one test element, configured to correct a measured value of the at least one analyte taking into account the actual sample volume, and configured to at least partially compensate changes in concentration to the measured value of the at least one analyte taking into account evaporation effects dependent on sample volume, wherein the measurement device comprises at least one sensor for detecting the actual sample volume. - View Dependent Claims (2, 3, 4, 11, 13)
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5. A system for detecting at least one analyte in a body fluid, the system comprising:
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at least one test element comprising a test panel configured to detect the at least one analyte; at least one lancet configured to generate a body fluid sample of less than 1 μ
l;an actuator configured to incite the at least one lancet; at least one capillary configured to transfer a whole or partial volume of the body fluid sample generated by the at least one lancet to the at least one test element in a transfer time of less than 1 second, wherein the at least one capillary has a ratio of fillable capillary length to capillary diameter of less than 100; and a measurement device configured to detect the at least one analyte, configured to detect an actual sample volume of the body fluid sample generated by the at least one lancet including a volume of the body fluid sample transferred to the at least one test element, configured to correct a measured value of the at least one analyte taking into account the actual sample volume, and configured to at least partially compensate changes in concentration to the measured value of the at least one analyte taking into account evaporation effects dependent on the actual sample volume, wherein the measurement device comprises at least one sensor for detecting the actual sample volume. - View Dependent Claims (6, 7, 14)
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8. A system for detecting at least one analyte in a body fluid, the system comprising:
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at least one test element comprising a test panel configured to detect the at least one analyte; at least one lancet configured to generate a body fluid sample of less than 1 μ
l;an actuator configured to incite the at least one lancet; at least one transfer device configured to transfer a whole or partial volume of the body fluid sample generated by the at least one lancet to the at least one test element in a transfer time of less than 1 second; a measurement device configured to detect the at least one analyte and configured to at least partially compensate changes in concentration to a measured value of the at least one analyte taking into account sample evaporation effects on the volume of the body fluid sample, wherein the measurement device comprises at least one sensor for detecting moisture during body fluid sample generating and transferring; and a housing having an interior and at least one opening, wherein the at least one test element, at least one lancet, the actuator, the at least one transfer device and the measurement device are within the interior of the housing, wherein a skin part can be placed wholly or partially in the opening to at least partially close the opening, and wherein the body fluid sample is generated in the skin part placed in the at least one opening. - View Dependent Claims (9, 10, 12, 15)
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Specification