System for determining the concentration of an analyte
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0 Petitions
Accused Products
Abstract
A system for determining the concentration of an analyte in at least one body fluid in body tissue comprises an infrared light source, a body tissue interface, a detector, and a central processing unit. The body tissue interface is adapted to contact body tissue and to deliver light from the infrared light source to the contacted body tissue. The detector is adapted to receive spectral information corresponding to infrared light transmitted through the portion of body tissue being analyzed and to convert the received spectral information into an electrical signal indicative of the received spectral information. The central processing unit is adapted to compare the electrical signal to an algorithm built upon correlation with the analyte in body fluid, the algorithm adapted to convert the received spectral information into the concentration of the analyte in at least one body fluid.
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Citations
137 Claims
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1-112. -112. (canceled)
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113. A system for determining the concentration of an analyte in at least one body fluid in body tissue, the system comprising:
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an infrared light source;
a body tissue interface to deliver light from the infrared light source to the body tissue;
a load cell for measuring an amount of pressure applied to the body tissue;
a detector adapted to receive spectral information corresponding to the infrared light reflected from the at least one body fluid and to convert the received spectral information into a signal indicative of the spectral information; and
a central processing unit adapted to use the signal indicative of the spectral information and the measured pressure from the load cell in an algorithm built upon correlation with the analyte in body fluid, the algorithm adapted to convert the received spectral information into the concentration of the analyte in at least one body fluid. - View Dependent Claims (114, 115, 116, 117, 118, 119, 120)
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121. A method for determining the concentration of an analyte in at least one body fluid in body tissue, the method comprising the acts of:
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contacting body tissue to be analyzed;
compressing the contacted body tissue;
measuring an amount of pressure applied to the body tissue being analyzed;
controlling the temperature of the body tissue such that the body tissue is maintained at a substantially uniform temperature;
directing infrared light into the body tissue;
detecting infrared light reflected from the body tissue;
analyzing the detected spectral information corresponding to the infrared light using an algorithm built upon correlation with the analyte in the at least one body fluid, the algorithm being adapted to use the detected spectral information corresponding to the infrared light to convert into the concentration of the analyte in at least one body fluid; and
determining the concentration of the analyte in at least one body fluid using the measured pressure to correct for spectral information. - View Dependent Claims (122, 123, 124, 125, 126, 127, 128, 129, 130)
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131. A method for determining the concentration of an analyte in at least one body fluid in body tissue, the method comprising the acts of:
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contacting body tissue to be analyzed;
compressing the contacted body tissue;
directing infrared light into the body tissue;
detecting infrared light reflected from the body tissue;
measuring pressure applied to the body tissue;
measuring temperature of the body tissue;
analyzing the detected spectral information corresponding to the infrared light using an algorithm built upon correlation with the analyte in the at least one body fluid, the algorithm being adapted to use the detected spectral information corresponding to the infrared light into the concentration of the analyte in at least one body fluid; and
determining the concentration of the analyte in at least one body fluid using the measured pressure and temperature to correct for spectral information. - View Dependent Claims (132, 133, 134, 135, 136)
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137. A method for determining the concentration of an analyte in at least one body fluid in body tissue, the method comprising the acts of:
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disposing an index matching medium on a surface of body tissue;
contacting body tissue to be analyzed;
compressing the contacted body tissue;
directing infrared light into the body tissue;
detecting infrared light reflected from the body tissue after passing through the index matching medium;
measuring pressure applied to the body tissue being analyzed;
analyzing the detected reflected light using an algorithm built upon correlation with the analyte in the body fluid, the algorithm being adapted to convert the detected reflected light into the concentration of the analyte in at least one body fluid; and
determining the concentration of the analyte in at least one body fluid using the measured pressure to correct for spectral information.
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Specification