Measuring device for measuring a bodily function and method for operating such a measuring device
First Claim
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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.
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Abstract
A measuring device (10) has at least one sensor (16, 18), which can be applied to the skin surface (12) of a patient for detecting a measured value with the sensor (16, 18). The device (10) has two contact surfaces (20, 22) on an underside (24), which is intended for being in contact with the skin surface (12) of the patient. A current detecting (32, 34), detects a measuring current (30) resulting from a particular effective electric resistance between the contact surfaces (20, 22). A method for operating such a measuring device (10) and a system with such a measuring device (10) are also provided.
79 Citations
19 Claims
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1. A measuring device comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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a medical device; and at least one measuring device connected to the medical device by means of a first feed line and a second feed line, the measuring device comprising; at least one sensor connected to the first feed line and the second feed line, wherein the measuring device is positionable on skin surface of a patient for the at least one sensor to detect a measured value and provide a sensor signal; at least one first contact surface connected to the first feed line and the second feed line, the at least one first contact surface being provided on an underside of the measuring device; at least one second contact surface connected to the first feed line and the second feed line, the at least one second contact surface being provided 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 with the skin; and 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, the detected measuring current comprises the contact signal 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, wherein a feed current is fed to the measuring device, by means of the medical device, alternatingly via the first and second feed lines, and the measuring current comprises a sum signal comprised of the contact signal and the sensor signal, which sum signal can be analyzed by means of the medical device during operation, which sum signal is fed to the medical device by the measuring device via a respective complementary feed line. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A measuring device method comprising:
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providing a medical device with at least one measuring device connected to the medical device by a feed circuit feeding current to the measuring device alternatingly via a first feed line and a second feed line, wherein the measuring device comprises; at least one sensor connected to the first feed line and the second feed line, 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 connected to the first feed line and the second feed line, the at least one first contact surface being provided on an underside of the measuring device; at least one second contact surface connected to the first feed line and the second feed line, the at least one second contact surface being provided 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 with the skin; and 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, the detected measuring current comprising a contact signal and being 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 to the first feed line and the second feed line 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 feeding current to the measuring device by means of the medical device alternatingly via the first and second feed lines, and the measuring current comprising the contact signal and a sensor signal as a sum signal, which sum signal can be analyzed by means of the medical device during operation, is fed to the medical device by the measuring device via a respective complementary feed line. - View Dependent Claims (19)
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Specification