Sensing device for body tissue properties
First Claim
1. A device for measuring a parameter of living tissue, which parameter affects a response of said tissue to an electric field, said device comprisinga substrate (2),an electrode arrangement (10, 12a, 12b, 13a-13c, 14) comprising at least a first and a second electrode and being mounted on a first side of said substrate (2), wherein said first and second electrodes are separated by a gap (15),a control unit (30) adapted to determine the response of said tissue to the electric field generated by said electrodes,wherein said gap (15) is filled at least partially with a solid (16), andwherein said device further comprises at least one optical reflection sensor (23a-c), and wherein said at least one optical reflection sensor (23a-c) extends into said gap (15).
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Accused Products
Abstract
A device is described for measuring a parameter of living tissue, in particular a glucose level, which parameter affects a response of said tissue to an electric field. The device comprises a substrate (2), which carries a ground electrode (10) as well as a plurality of signal electrodes (12a, 12b, 13a-13c, 14). The gaps (15) between the ground electrode and the signal electrodes are filled with a solid filler material (16) in order to provide an even surface. Optical reflection detectors (23a, 23b, 23c) can also be located in these gaps in order to avoid field distortions and obtain a compact design. The backside of substrate (2) carries electronic high-frequency components for improving signal quality.
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Citations
20 Claims
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1. A device for measuring a parameter of living tissue, which parameter affects a response of said tissue to an electric field, said device comprising
a substrate (2), an electrode arrangement (10, 12a, 12b, 13a-13c, 14) comprising at least a first and a second electrode and being mounted on a first side of said substrate (2), wherein said first and second electrodes are separated by a gap (15), a control unit (30) adapted to determine the response of said tissue to the electric field generated by said electrodes, wherein said gap (15) is filled at least partially with a solid (16), and wherein said device further comprises at least one optical reflection sensor (23a-c), and wherein said at least one optical reflection sensor (23a-c) extends into said gap (15).
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10. A device for measuring a parameter of living tissue, which parameter affects a response of said tissue to an electric field, said device comprising
a substrate (2), an electrode arrangement (10, 12a, 12b, 13a-13c, 14) comprising at least a first and a second electrode and being mounted on a first side of said substrate (2), wherein said first and second electrodes are separated by a gap (15), a control unit (30) adapted to determine the response of said tissue to the electric field generated by said electrodes, wherein said gap (15) is filled at least partially with a solid (16), wherein said electrode arrangement (10, 12a, 12b, 13a-5 13c, 14) comprises a ground electrode (10) and several signal electrodes (12a, 12b, 13a-13c, 14) on said first side of said substrate (2), wherein said signal electrodes (12a, 12b, 13a-13c, 14) are arranged in openings of said ground electrode (10), and wherein said gaps (15) are formed between inner edges of said openings and outer edges of said signal electrodes (12a, 12b, 13a-13c, 14), said device further comprising a first set (12a, 12b) of signal electrodes surrounded by gaps (15) of different widths, a second set (13a-13c) of signal electrodes surrounded by gaps (15) of different widths, a first signal generator (33) connected to said first set (12a, 12b) of signal electrodes and operating at a frequency of at least 1 GHz, and a second signal generator (32) connected to said second set (13a-13c) of signal electrodes and operating at a frequency between 0.1 and 500 MHz.
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16. A device for measuring a parameter of living tissue, which parameter affects a response of said tissue to an electric field, said device comprising
a substrate (2), an electrode arrangement (10, 12a, 12b, 13a-13c, 14) comprising at least a first and a second electrode and being mounted on a first side of said substrate (2), wherein said first and second electrodes are separated by a gap (15), and a control unit (30) adapted to determine the response of said tissue to the electric field generated by said electrodes, wherein said gap (15) is filled at least partially with a solid (16), wherein said electrode arrangement (10, 12a, 12b, 13a-5 13c, 14) comprises a ground electrode (10) and several signal electrodes (12a, 12b, 13a-13c, 14) on said first side of said substrate (2), wherein said signal electrodes (12a, 12b, 13a-13c, 14) are arranged in openings of said ground electrode (10), and wherein said gaps (15) are formed between inner edges of said openings and outer edges of said signal electrodes (12a, 12b, 13a-13c, 14), said device further comprising at least one pair of electrodes designed as interdigital electrodes (22), and wherein said device further comprising a third signal generator (31) connected to said interdigital electrodes (22) and generating a signal at a frequency below 0.2 MHz.
Specification