US 10,376,152 B2
Measuring device for measuring a bodily function and method for operating such a measuring device
Jochim Koch, Ratzeburg (DE); and Thomas Grassl, Lübeck (DE)
Assigned to DRÄGERWERK AG & CO. KGAA, Lübeck (DE)
Appl. No. 14/901,821
Filed by Drägerwerk AG & Co. KGaA, Lübeck (DE)
PCT Filed Jun. 27, 2014, PCT No. PCT/EP2014/001764
§ 371(c)(1), (2) Date Dec. 29, 2015,
PCT Pub. No. WO2015/000570, PCT Pub. Date Jan. 8, 2015.
Claims priority of application No. 10 2013 011 141 (DE), filed on Jul. 3, 2013.
Prior Publication US 2016/0367150 A1, Dec. 22, 2016
Int. Cl. A61B 5/00 (2006.01); A61B 5/01 (2006.01); G01K 13/00 (2006.01); G01K 15/00 (2006.01)
CPC A61B 5/01 (2013.01) [A61B 5/6843 (2013.01); G01K 13/002 (2013.01); G01K 15/007 (2013.01); A61B 2562/14 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A measuring device comprising:
at least one sensor, wherein the measuring device is positionable on skin surface of a patient for the at least one sensor to detect a measured value;
at least one first contact surface on an underside of the measuring device;
at least one second contact surface on the underside of the measuring device, which said underside is intended for being in electrical contact with the skin surface of the patient, the at least one first contact surface and the at least one second contact surface being arranged to have a resistance between the at least one first contact surface and the at least one second contact surface that is a function of electrical contact of the at least one first contact surface and the at least one second contact surface with the skin surface of the patient;
a detecting means for detecting a measuring current resulting from a particular effective electric resistance between the at least one first contact surface and second contact surface, wherein the detected measuring current is a function of electrical contact of the at least one first contact surface and the at least one second contact surface with the skin, wherein the sensor and the at least one first and second contact surfaces are connected electrically in parallel and wherein a power cut-off element is located either in a current path to the sensor or in a current path to the at least one first and second contact surfaces; and
a feed circuit to feed current to the measuring device alternatingly via a first feed line and a second feed line, the sensor and the at least one first and second contact surfaces being connected electrically in parallel to the first feed line and a second feed line and the measuring current comprises a sum signal comprising a contact signal, which is a function of electrical contact of the at least one first contact surface and the at least one second contact surface with the skin and a sensor signal provided by the sensor.