WO2013063634A1 - Measurement device for measuring glucose - Google Patents

Measurement device for measuring glucose Download PDF

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Publication number
WO2013063634A1
WO2013063634A1 PCT/AT2012/050170 AT2012050170W WO2013063634A1 WO 2013063634 A1 WO2013063634 A1 WO 2013063634A1 AT 2012050170 W AT2012050170 W AT 2012050170W WO 2013063634 A1 WO2013063634 A1 WO 2013063634A1
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WO
WIPO (PCT)
Prior art keywords
nfc antenna
measuring device
unit
data
energy
Prior art date
Application number
PCT/AT2012/050170
Other languages
German (de)
French (fr)
Inventor
Manfred Bammer
Stefan CECIL
Original Assignee
Ait Austrian Institute Of Technology Gmbh
Seibersdorf Labor Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to AT16032011A priority Critical patent/AT512101A2/en
Priority to ATA1603/2011 priority
Application filed by Ait Austrian Institute Of Technology Gmbh, Seibersdorf Labor Gmbh filed Critical Ait Austrian Institute Of Technology Gmbh
Publication of WO2013063634A1 publication Critical patent/WO2013063634A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/145Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/14532Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring glucose, e.g. by tissue impedance measurement
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/0002Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0015Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/02Operational features
    • A61B2560/0204Operational features of power management
    • A61B2560/0214Operational features of power management of power generation or supply
    • A61B2560/0219Operational features of power management of power generation or supply of externally powered implanted units

Abstract

The invention relates to a measurement device for measuring glucose, comprising: a glucose sensor (1) for determining the glucose content in a solution or fluid, in particular in blood, and for reproducing the measured glucose content in the form of an electrical signal with measurement data presented in encoded form; an NFC antenna (2); an energy withdrawal unit (3) downstream of the NFC antenna (2), which controls the NFC antenna (2) in such a way that the NFC antenna (2) withdraws energy from the field surrounding the NFC antenna (2) if electromagnetic waves in a predetermined frequency range are present, and wherein the NFC antenna (2) is upstream of the glucose sensor (1) and supplies it with electrical energy; the invention also relates to a communication unit (4), which is supplied with energy by the energy withdrawal unit (3), wherein the communication unit (4) receives the measurement data acquired by the glucose sensor (1) and the communication unit (4) applies a signal containing measurement data to the NFC antenna (2).

Description

 Measuring device for glucose measurement

The invention relates to a measuring device for measuring glucose according to the preamble of patent claim 1 and to a method for determining the glucose content in a solution according to the preamble of patent claim 11.

 The invention is advantageously used in the field of determination of glucose in the blood of a human or an animal.

Background of the invention is to facilitate the performance of a regular determination of the glucose content of the blood of diabetics. Worldwide, about 6% of all people are diabetics, in the industrialized countries, the proportion of diabetics is about 8%. Per day, up to ten measurements must be taken in a type 1 diabetic to be able to determine the blood sugar level sufficiently. The required blood glucose measurements should influence the daily routine of the patient as little as possible. This can be achieved primarily by the fact that the measurement of blood sugar can be performed as quickly as possible, uncomplicated and with little effort. The equipment needed was to be small and easily stowed, in order to be able to carry out the measurements mobile at various locations.

For older people with diabetes, who are mostly type 2 diabetics, a simple, easy-to-understand and readable representation of readings is extremely important. In the case of diabetics of type 1, an intuitive graphical representation of the measured values, for example in the form of individual readings as well as daily, weekly or monthly profiles, is necessary in order to learn how to deal with diabetes as well as ongoing self-management. Also, linking to other information relevant to diabetes, such as blood pressure, activity, and food intake, as measured in bread units, is specifically required in Type 1 diabetics to adequately determine the insulin dose.

Glucose meters, as used in the prior art today for the determination of blood sugar content, are a few inches tall and have a digital display, a battery or accumulator, a measured value memory and a measuring unit, wherein in the measuring unit gauges are introduced. Complete equipment of a diabetic thus consists of a lancing device with the associated disposable needles, a container with the test measuring strip, the measuring device itself and the associated insulin injections. The measurement is made by inserting the test strip into the device, a small drop of blood on the measuring strip is applied and then the measurement is started automatically. The glucose meters have a built-in clock, whereby the measured value is stored together with a timestamp delivered by the built-in clock and can be recalled by this device.

A disadvantage of conventional glucose meters is that the data of the measurements are only stored on the glucose meter. The disclosure of this data, e.g. To a treating physician must either be performed by the physician himself, who must view or read the data stored on the device, or be made by the patient himself, who must read the data and then either copy it to paper or enter it into a computer. Some glucose meters also have a serial, USB or Bluetooth interface that allows data to be electronically transferred to a computer. The glucose meters are all powered by a battery or a rechargeable battery.

All measuring instruments have the disadvantage that the glucose meter, which has to be carried along at all times, has a certain minimum size in order to enable readout or evaluation and the determination of the dose of insulin injection dependent thereon. In general, there is also the problem of transferring the data and the fact that the battery of the glucose meter must be charged frequently and in the event that the patient forgets charging, the glucose value can not be determined.

The object of the invention is thus to provide a glucose meter that has a small design and that does not need to be charged at regular intervals.

The invention solves this problem in a measuring device of the type mentioned above with the features of claim 1.

 Furthermore, the invention solves the problem in a method of the type mentioned above with the characterizing part of claim 1 1.

 According to the invention, a measuring device is provided which comprises the following units:

a glucose sensor for determining the glucose content in a solution, in particular in blood, and for reproducing the measured glucose content in the form of an electrical signal with coded measurement data, an NFC antenna,

 - An NFC antenna downstream energy extraction unit that controls the NFC antenna such that the NFC antenna in the presence of electromagnetic waves in a predetermined frequency range energy from the NFC antenna surrounding field takes, and wherein the NFC antenna to the glucose sensor is upstream and this supplied with electrical energy as well

 a communication unit which is supplied with energy by the energy extraction unit, to which the measurement data determined by the glucose sensor are supplied and which impresses a signal containing the measurement data to the antenna.

The invention enables an extremely small version of a measuring device, since no display, but only a small energy storage, a small data storage and next to the NFC antenna no other interfaces and only a small processing unit to the measuring device are required.

An essential advantage of such a measuring device is that the glucose measurement can be carried out without its own battery and the results of the glucose measurement can be determined directly from a mobile phone also stored on this. It is also possible to transfer the data over the Internet to various databases. As a result, the glucose meter can be made substantially smaller, since no display, no battery, and no data storage unit are needed on the meter itself. For this purpose, the corresponding facilities of the mobile phone are advantageously used.

Another advantage is that in the present invention, only the measuring device as a medical device is subject to the regulatory requirements, while the control unit in the form of a mobile phone is available and possibly the specific software application for operation in accordance with the regulatory requirements to submit. The software is used for data acquisition, storage, calculation of the current measured value as well as of time courses, trends and mean values as well as for the visualization of the data values.

Due to the physical separation of the application part measuring device and the control unit, the measuring device and the software running in the control unit in the form of, for example, a software application (app) can be admitted separately as a medical device. If the glucose measuring unit were integrated in the control unit, the entire control unit would have to be certified as a medical device Me cost would mean, and at the speed with which new phones are brought to market, would be economically feasible.

The immediate presence of the glucose measurement data in an NFC-enabled control unit, in particular in a smartphone, allows, in addition to the abovementioned possibilities for data processing and measured value representation, a multiplicity of further functions supporting the patient in the form of software applications, such as e.g. Therapy suggestions (insulin dose calculation), suggestions for food intake (bread unit calculator, "bread unit dictionary" of food), possibly taking into account the anticipated physical activity (office work, hiking, sports, etc.).

The present invention, when coupled to a control unit configured as a mobile telephone, enables mobile measurement. The proliferation of mobile phones and smart phones is very large nowadays, whereby the invention described above will quickly find wide application. The likelihood that the mobile phone will be forgotten at home is now typically relatively low and is usually noticed quickly. The battery of the mobile phone can be loaded today usually standardized via mini-USB power supplies. Compatibility by means of shaping of the NFC-Glocumeter application part and appropriate app to different NFC smartphones enables widespread distribution and easy software updating, and corresponding telemedical applications; Billing etc.

If required and desired by the user, it is possible to forward the blood glucose values to a telemonitoring center. The last measured values can be stored in the mobile phone or possibly also in the NFC glucometer (NFC chip) and read out again later.

A further advantage of the invention is that no separate battery and separate display are required to communicate the measured values to the user.

This approach requires less energy and is therefore more environmentally friendly than current blood glucose monitoring technologies.

In order to obtain sufficient energy for the glucose measurement and the data transmission, it can be provided that the energy extraction unit has a tuning unit connected in parallel to the NFC antenna, in particular a capacitor with a capacity tunable or adjustable to a predetermined frequency, so that the NFC antenna takes a maximum power from the surrounding field in the presence of a given capacity.

 In order to be able to take advantage of a DC voltage that is advantageous for the further measurement, it can be provided that the energy extraction unit has one of the NFC antenna and / or the rectifier connected downstream of the tuning unit, which provides a DC voltage at its output, with which the glucose sensor uses energy is supplied.

 In order to provide larger amounts of energy for more complex measurements, it can be provided that an energy store, in particular a capacitor or an accumulator cell or a button cell, is arranged parallel to the outputs of the rectifier.

 The coupling between the external magnetic field and the NFC antenna can also cause the resulting DC voltage of the energy extraction to be too large for carrying out the measurement. For this case it can be provided that between the rectifier and the glucose sensor, a voltage limiting unit, in particular a Zener diode is arranged, which limits the voltage supplied to the glucose sensor to a predetermined value, in particular to the rated voltage of the glucose sensor.

 The limitation of the voltage can also be carried out by means of a light-emitting diode. The emitted light of the light emitting diode can be used at the same time as confirmation of the operational readiness of the entire measuring device.

This ensures that the output voltage of the energy extraction is limited in order to avoid damage to the glucose sensor or a termination of the measurement due to excessive voltage.

In the event that the resulting voltage of the energy extraction unit for performing the measurement is too low, but in principle enough energy is present and can be transmitted, it can be provided that between the rectifier and the glucose sensor, a voltage conversion unit, in particular a DC / DC Transducer, is arranged, which transforms or reduces the voltage applied to the output of the rectifier or the voltage limiting unit voltage to the nominal voltage of the glucose sensor.

This is done above all with a converter or a suitable voltage conversion unit and the voltage is made available to the glucose sensor. Advantageously, it can be provided that the communication unit is designed for the encrypted transmission of the measured values. Parallel to the NFC antenna in this case, an NFC chip is switched as a communication unit, which transmits the result of the measurement to the receiver. The NFC standard enables sufficiently secure encrypted transmission.

 A particularly simple and energy-saving possibility of data transmission provides that the communication unit controls the NFC antenna and is designed to transmit the measured data supplied thereto by means of load modulation. The NFC antenna is used in addition to the energy transfer for data transmission. This is done with the NFC communication unit and the NFC antenna.

Furthermore, a preferred aspect of the invention relates to an arrangement comprising a measuring device according to the invention and a control device comprising an NFC antenna and a data processing unit and a display, wherein the data processing unit controls the NFC antenna for emitting energy to the measuring device and for bidirectional transmission of data between the control device and the measuring device is formed, and wherein the display is designed to display the measured values determined by the measuring device and transmitted to the control device. Such an arrangement allows a particularly simple handling in the measured value determination with a measuring device according to the invention

In this case, it can be provided that the control device has an antenna or an interface for transmitting the measured values, which have been determined and transmitted to the control device, to a processing unit. With such an arrangement, the determined measurement data can be transmitted particularly easily to interested persons, such as doctors.

Furthermore, the invention provides a method for determining the glucose content in a solution, in particular in the blood before. This method is carried out with a control unit, in particular an NFC-enabled mobile telephone, and a measuring device, in particular a measuring device according to the invention, wherein the control unit has a further NFC antenna. The measuring device has a glucose sensor and the solution is fed to the glucose sensor. According to the invention, energy is transmitted from the control unit to the measuring device via the further NFC antenna, - That the measuring device transmits the received energy to the glucose sensor and the glucose sensor determines a reading regarding the glucose content contained in the solution,

 - That the measured value is transmitted via the NFC antenna and the other NFC antenna to the control unit.

 To prevent the disclosure of confidential medical information, it may be provided that the measured values are transmitted in encrypted form between the NFC antenna and the further NFC antenna and the control unit.

 On the one hand, an encrypted transmission takes place on the other hand, monitoring of the information is only possible if the intercepting antenna is in the immediate vicinity of the respective measuring device. Overall, this enables secure transmission of medical data.

In order to reduce the energy required for the transmission, it can be provided that the transmission of the measured values between the NFC antenna and the further NFC antenna takes place via load modulation, wherein the load of the NFC antenna of the measuring device is modulated.

In order to enable the respective patient to obtain as quickly as possible information about his blood sugar content, provision may be made for the measured values determined and transmitted to the control unit to be displayed on the control unit, in particular on a display. By using the display of a mobile phone, the individual values can be displayed large and colored.

 When using modern smartphones with a large display is also a better readability of the readings and / or blood sugar levels, or for the blind and visually impaired people is also a voice output possible.

For the collection and linking of all relevant measured data determined and the respective measuring time can be provided that the determined and transmitted to the control unit measured values are provided by the control unit with other data, the measured value and the other data stored in a common record on a memory or In particular, the further data include one or more of the following values:

 - a time value or timestamp that corresponds to the time of the measurement

- data concerning the person or the identity of the person who carried out the measurement or who had been removed from the solution or the blood whose glucose level had been determined, - the fact that the reading is a glucose reading.

 , As a result, all relevant data is collected in a single data package and the evaluation is greatly simplified.

To enable the analysis of the collected glucose measurement data by a physician or other authorized person or by the patient himself, it may be provided that the data is forwarded by the control unit to another central storage and processing unit, in particular by means of mobile radio. The analyzes for the data can in particular be transmitted via the Internet to certain persons authorized by the patient.

The invention is illustrated in more detail below with reference to a drawing figure. The Fig. Shows a particularly advantageous embodiment of the invention schematically.

The FIGURE schematically shows an arrangement for glucose measurement with a measuring device 10, a control unit 5 and a processing unit 6. The control unit 5 used in the present exemplary embodiment is a mobile telephone, a smartphone with an NFC / RFID interface. The specific measurement of the glucose content takes place by means of the measuring device 10, which determines a measured value and then transmits it to the control unit 5 on. The ascertained measured values can be visualized and temporarily stored with the control unit 5 and, if appropriate, forwarded to a processing unit 6.

By using a mobile phone or smartphone as a control unit 5, a simplification of the measurements, an improvement of the data visualization and a significant reduction in the necessary costs for the equipment required for measurement can be achieved for a diabetic because a mobile phone or smartphone is usually available or can be purchased inexpensively. The transmission of the measured values from the measuring unit to the mobile phone can be carried out via an NFC / RFID antenna.

The measuring device 10 for glucose measurement is available as a separate and separate from the control unit 5 unit. In contrast to known measuring devices, however, the measuring device 10 in the present embodiment of the invention does not require its own display. Furthermore, in the present embodiment, the communication unit 4 requires much less memory, computing power and consequently also less energy, so that the required energy storage and other resources can be made much smaller and cheaper.

The measuring device 10 has a suitable wireless interface to the control unit 5 for data transmission and energy input. In the present exemplary embodiment, this interface is implemented by RFID / NFC technology.

By forming the wireless interface by two NFC antennas 2, 51, energy can also be transmitted in a simple manner between the measuring device 10 and the control unit 5. The NFC standard ensures not only a data transmission over a few cm by inductive coupling but also the possibility of energy transfer to the power supply of the measuring device 10.

This small distance, including encrypted transmission between the mobile phone and the NFC glucometer, ensures maximum security in data transmission, which is an important factor in the healthcare sector for sensitive personal data.

With the help of suitable NFC-enabled smartphones, the data visualization, such as large font for persons with poor eyesight or graphs for type 1 diabetics for self-management and thus the usability (usability) can be significantly improved.

The use of NFC-enabled mobile phones as a control unit 5 can also trigger reminder functions, where the diabetics are reminded either of their measurements, insulin doses or drugs. These reminder functions are either part of the software app on the mobile phone, which can be modified at each visit to the doctor, or the reminders are generated via a telemonitoring server and can also be individualized via this route.

The measuring device 10 has an NFC antenna 2, the control unit 5 also has an NFC antenna 51. If these two NFC antennas 2, 51 brought to a distance of a few centimeters, so both data and energy between the measuring device 10 and the control unit 5 can be transmitted. This is ideally achieved by placing the control unit 5 on the measuring device 10. The measuring device 10 is shaped such that a stable position of the control unit 5 on the measuring device 10 is possible. It is easy for the user to see through a so-called N-mark icon how the control unit 5 is positioned on the measuring device 10 in order to ensure sufficient transmission of data and energy between the control unit 5 and the measuring device 10. As support, software may be included in the control unit 5, which indicates the degree of coupling of the two NFC antennas 2, 51, whereby the user reaches the optimal alignment of the control unit 5 and measuring device 10. Both data and energy for the measurements between the control unit 5 and the measuring device 10 are transmitted via the NFC connection. The measuring device 10 can thus be realized without independent power supply and has in the present embodiment, only an energy storage 33 for short-term storage of energy. Alternatively, a smaller battery could also serve as the energy store 33, in which sufficient energy can be stored to carry out 10 measuring operations.

In the measuring device 10, there is installed a communication unit 4 connected to the NFC antenna 2, which is in communication with the NFC antenna 51 and a data processing unit 50 of the control unit 5; Thus, the control unit 5 can identify the measuring device 10 and start the corresponding application program. If the NFC antenna 51 of the control unit 5 has no connection to the measuring device 10, the magnetic field emitted by the NFC antenna 51 is usually only pulsed. This pulsed magnetic field provides the measuring device 10 with sufficient energy for reading out or identifying the measuring device 10. As soon as the control unit 5 has made a connection with the measuring device 10 and a measurement is also to be carried out, the control unit 5 outputs a magnetic field over a specific time interval. in particular an alternating field, in order to also enable the energy supply during the measurement, in the present case a glucose measurement. The release of energy can be initiated by a running on the control unit 5 computer program.

In order to ensure both the NFC data transmission and the power supply, the measuring device 10 is equipped with an NFC antenna 2 with a receiver coil. The power consumption of a commercially available glucose sensor 1 is 3-5mW during the measurement. Parallel to the receiver coil are a tuning unit for the resonance transmission and the above-mentioned communication unit 4. The data transmission from the communication unit 4 of the measuring device 10 to ? ?

Control unit 5 is implemented via an NFC standard compatible transmission protocol (e.g., ISO / IEC 14443). The NFC antenna 2 of the measuring device 1 0 must be dimensioned so that parallel to the communication unit 4, in this embodiment, an NFC chip, and the power supply of the glucose sensor 1 can be done by the induced magnetic field. For this purpose, the coupling between the NFC antenna 51 on the control unit 5 and the NFC antenna 2 on the measuring device 1 0 is very effectively designed by the distance between the NFC antennas 2, 51 is as low as possible and the windings of the NFC antennas 2, 51 have approximately the same size and shape.

The NFC antenna 2 in the measuring device 10 is designed as a coil with an optimally adapted number of turns, in which the energy transfer is maximum. For optimizing the energy transfer, a tuning unit 31 in the form of a capacitor connected in parallel with the receiving coil is generally additionally useful.

Parallel to the communication unit 4, an energy extraction unit 3 is connected, which extracts the transmitted energy of the NFC antenna 2 and the glucose sensor 1 withdrawn. The energy extraction unit 3 comprises, in addition to the tuning unit 31, a rectifier 32 and an energy store 33.

The rectifier 32 is designed as a bridge or two-way rectifier with corresponding high-frequency diodes. When using a bridge or full-wave rectifier thus results in a pulsed at 27, 12MHz DC voltage, this voltage is smoothed after the rectifier 32 with a capacity, for example, between ~ \ 00μ and 500 ^ F. Alternatively, as a rectifier 32, a half-wave rectifier can be used, at the output of which a pulsed with 1 3.56 MHz DC voltage is applied.

As energy storage 33, in addition to the capacity, a 3V button cell can be used, which provides a supply voltage of approximately between 2.3 and 3.7V for a regular measurement with the glucose sensor 1. To charge the battery without damage, the tuning unit 31 and the rectifier 32 are set such that the created rectified voltage is in this voltage range. In order to avoid that the induced voltage comes outside of said voltage range, optionally a voltage limiting unit 34, for example in the form of a Zener diode or LED, may be provided, which is parallel to the output of the rectifier 32 or the energy store 33. Furthermore, an unillustrated DC / DC converter may be provided to transform low voltages applied to the energy storage 33 to a higher value. If the voltage applied to the energy store 33 is too low overall, it is still possible to provide a further storage capacity as an energy store 1 1 between the rectifier 32 and the DC / DC converter, in which enough energy can be temporarily stored for a measurement.

After completion of the measurement, the measurement result is transmitted to the tuning unit 31 and transmitted from there via the NFC antennas 2, 51 to the control unit 5. The measurement result is provided by the control unit 5 with time stamp and stored in a data memory 53. If necessary, an application program can run on the data processing unit 50 of the control unit 5, which processes the determined measured values with algorithms and filters. Subsequently, the measured values are displayed on a display 52 of the control unit 5. The results of the measurements can also be processed by the control unit 5 and / or the data processing unit 50 without the existing connection to the measuring device 10. Alternatively or additionally, it is also possible to transmit the data to a processing unit 6. This transmission can take place in different ways. In the present embodiment, a data transmission via mobile telephony is used. The trained as a mobile control unit 5 has a further antenna 54, the processing unit 6 is in this case a server that is connected via the Internet to a mobile network and ultimately a mobile phone antenna 61.

Alternatively, the communication between the control unit 5 and the processing unit 6 can also take place via wired lines. The data obtained are ultimately transmitted to an authorized person, such as a family doctor, who evaluates the data and causes a corresponding medication.

The present invention works particularly well for the measurement of glucose. Instead of a glucose sensor 1, however, in principle any sensor can be used which determines medical or otherwise relevant data, the advantage always being that a separate display unit on the measuring device 10 is not required.

Claims

claims:
1 . Measuring device for glucose measurement, comprising
 a glucose sensor (1) for determining the glucose content in a solution or liquid, in particular in blood, and for reproducing the measured glucose content in the form of an electrical signal with coded data shown coded,
 an NFC antenna (2),
 - One of the NFC antenna (2) downstream energy extraction unit (3), which controls the NFC antenna (2) such that the NFC antenna (2) in the presence of electromagnetic waves in a predetermined frequency range energy from the NFC antenna (2) surrounding field takes, and wherein the NFC antenna (2) is connected upstream of the glucose sensor (1) and this supplied with electrical energy and
- A communication unit (4), which is powered by the energy extraction unit (3), wherein the communication unit (4) supplied by the glucose sensor (1) measurement data are supplied and the communication unit (4) of the NFC antenna (2) a the Imprinting signal containing measured data.
2. Measuring device according to claim 1, characterized in that the energy extraction unit (3) has a parallel to the NFC antenna (2) connected tuning unit (31), in particular a capacitor with a tunable to a predetermined frequency or adjustable capacity, so that the NFC Antenna (2) in the presence of a predetermined capacity takes a maximum power from the surrounding field.
3. Measuring device according to claim 1 or 2, characterized in that the energy extraction unit (3) has one of the NFC antenna (2) and / or the tuning unit (31) downstream rectifier (32) which provides a DC voltage at its output , with which the glucose sensor (1) is supplied with energy.
4. Measuring device according to claim 3, characterized in that parallel to the outputs of the rectifier (32) an energy store (33), in particular a capacitor or an accumulator cell or a button cell, is arranged.
5. Measuring device according to claim 4, characterized in that between the rectifier (32) and the glucose sensor (1) a voltage limiting unit (34), is provided which the the glucose sensor (1) supplied voltage to a predetermined value, in particular limited to the rated voltage of the glucose sensor (1), wherein as a voltage limiting unit (34) preferably a zener diode is provided or a light emitting diode is provided, wherein the light emitting diode as confirmation of the readiness of the entire measuring device (10) emits light.
6. Measuring device according to one of claims 4 or 5, characterized in that between the rectifier (32) and the glucose sensor (1) a voltage conversion unit (35), in particular a DC / DC converter is arranged, which at the output of the rectifier ( 32) or the voltage limiting unit (34) voltage is transformed or reduced to the nominal voltage of the glucose sensor (1).
7. Measuring device according to one of the preceding claims, characterized in that the communication unit (4) is designed for the encrypted transmission of the measured values.
8. Measuring device according to one of the preceding claims, characterized in that the communication unit (4) controls the NFC antenna (2) and is designed to transmit the measurement data supplied thereto by means of load modulation.
9. Arrangement comprising a measuring device (10) according to one of the preceding claims and a control device (5), in particular a mobile telephone, comprising an NFC antenna (51) and a data processing unit (50) and a display (52), wherein the data processing unit ( 50) drives the NFC antenna (51) for the delivery of energy to the measuring device (10) and is designed for the bidirectional transmission of data between the control device (5) and the measuring device (10), and wherein the display (52) for display the measured values determined by the measuring device (10) and transmitted to the control device (5) are formed.
10. Arrangement according to claim 9, characterized in that the control device (5) has an antenna (54) or an interface for transmitting the measured values transmitted to the control device (5) to a processing unit (6).
1 1. A method for determining the glucose content in a solution, in particular in blood, with a control unit (5), in particular an NFC-enabled mobile telephone, and a measuring device (10), in particular according to one of the preceding claims, wherein the control unit (5) via a further NFC antenna (51), and wherein the Measuring device (10) has a glucose sensor (1), and the solution is supplied to the glucose sensor (1), characterized
 that energy is transmitted from the control unit (5) via the further NFC antenna (51) to the measuring device (10),
 - That the measuring device (10) transmits the received energy to the glucose sensor (1) and the glucose sensor (1) determines a reading regarding the glucose content contained in the solution, and
 - That the measured value via the NFC antenna (2) and the other NFC antenna (51) to the control unit (5) is transmitted.
12. The method of claim 1 1, characterized in that the measured values between the NFC antenna (2) and the further NFC antenna (51) and the control unit (5) are transmitted in encrypted form.
13. The method of claim 1 1 or 12, characterized in that the transmission of the measured values between the NFC antenna (2) and the further NFC antenna (51) takes place via load modulation, wherein the load of the NFC antenna (2) of the Measuring device (10) is modulated.
14. The method according to any one of claims 1 1 to 13, characterized in that the determined and transmitted to the control unit (5) measured values on the control unit, in particular on a display (52) are displayed.
15. The method according to claim 1, characterized in that the measured values transmitted to the control unit (5) are provided by the control unit (5) with further data, wherein the measured value and the further data are stored in a common data record be stored or buffered on a data memory (53), wherein the further data in particular comprise one or more of the following values:
 - a time value or timestamp that corresponds to the time of the measurement
 - data concerning the person or the identity of the person who carried out the measurement or who had been removed from the solution or the blood whose glucose level had been determined,
- the fact that the reading is a glucose reading.
16. The method according to any one of claims 1 1 to 15, characterized in that the data from the control unit (5) to a further central storage and processing unit (6), in particular by means of mobile radio, are forwarded.
PCT/AT2012/050170 2011-10-31 2012-10-30 Measurement device for measuring glucose WO2013063634A1 (en)

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ATA1603/2011 2011-10-31

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