US 12,336,811 B2
Measuring device for determining the blood sugar content
Monika Gericke Estermann, Zürich (CH); and Ivan Ivanowitsch Turkovski, Zollikon (CH)
Appl. No. 17/430,418
Filed by Monika Gericke Estermann, Zürich (CH); and Ivan Ivanowitsch Turkovski, Zollikon (CH)
PCT Filed Feb. 13, 2020, PCT No. PCT/EP2020/053760
§ 371(c)(1), (2) Date Aug. 12, 2021,
PCT Pub. No. WO2020/165344, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 10 2019 103 641.0 (DE), filed on Feb. 13, 2019.
Prior Publication US 2022/0151520 A1, May 19, 2022
Int. Cl. A61B 5/145 (2006.01); A61B 5/00 (2006.01); A61B 5/053 (2021.01); A61B 5/263 (2021.01)
CPC A61B 5/14532 (2013.01) [A61B 5/053 (2013.01); A61B 5/263 (2021.01); A61B 5/681 (2013.01); A61B 2562/066 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A measuring device for determining an estimated value for blood sugar content of a person by using a non-invasive impedance measurement, wherein the measuring device comprises:
a measurement transducer configured to determine the blood sugar content from a measured value; and
a sensor unit configured to detect the measured value,
wherein the sensor unit comprises at least two tetrapolar electrode assemblies, each of the at least two tetrapolar electrode assemblies having at least first and second electrode pairs arranged along a respective first linear axis,
wherein the respective first linear axes of the two tetrapolar electrode assemblies are aligned perpendicularly to one another,
wherein the first electrode pair of each of the at least two tetrapolar electrode assemblies is configured to emit and receive a current signal, and wherein the second electrode pair of each of the at least two tetrapolar electrode assemblies is configured to tap a potential upon contact with skin of the person,
wherein each of the electrodes of the electrodes pairs has a contact surface for contacting the skin, wherein the contact surface of each of the electrodes consists of a metal with a conductivity of more than 1*107 S/m or the contact surface of each of the electrodes consists of a metal alloy with a conductivity of more than 1*107 S/m, and
wherein each of the electrodes comprises an inner electrode consisting of a noble metal and comprises a support sleeve having a channel that is closed off by the inner electrode, wherein the inner electrode extends beyond the support sleeve, wherein the support sleeve is made of
a material with a Vickers hardness of more than 40 according to DIN EN 6507-1:2018-07, or
a silicon compound with a Vickers hardness of more than 40 according to DIN EN 6507-1:2018-07, and with a thermal conductivity of more than 100 W/(m*K),
wherein the sensor unit has a plate or a leather segment on which the at least two tetrapolar electrode assemblies are anchored, wherein the plate or the leather segment has a fatigue bending strength according to DIN EN ISO 5402-1:2017-05 or ISO 4666-2 of 100,000 folds without damage,
wherein each electrode of the first and second electrode pairs is:
arranged in an opening of the plate and the support sleeve of each electrode comprises a radial projection on a surface of the plate and at an edge of the opening of the plate as a stop, or
arranged in an opening of the leather segment and the support sleeve of each electrode comprises a radial projection on a surface of the leather segment and at an edge of the leather segment as a stop.