Armband for a detection device for the detection of a blood count parameter

1. An armband suitable to contact an arm of a user, comprising:

a detection device for detecting a blood picture parameter of blood in a blood vessel of the arm, and

a setting device for setting a predetermined contact pressure on the arm,

wherein:

the detection device comprises a transmitter configured to couple at least one radiofrequency electromagnetic wave signal into the blood vessel as a waveguide and a receiver configured to receive the signal after its transmission through the blood vessel,

the detection device comprises an excitation arrangement configured to generate the at least one radiofrequency electromagnetic wave signal, and

the setting device is configured to set the contact pressure of the transmitter and receiver on the arm to the predetermined contact pressure.

2. The armband as claimed in claim 1 , wherein the setting device is configured to set the contact pressure to the predetermined contact pressure at least during detection of the blood picture parameter by the detection device.

3. The armband as claimed in claim 1 , wherein the setting device comprises a sensor apparatus for measuring a current contact pressure on the arm and a control apparatus for setting the predetermined contact pressure depending on the measured current contact pressure.

4. The armband as claimed in claim 3 , wherein the sensor apparatus is arranged to contact the user's arm.

5. The armband as claimed in claim 1 , wherein the armband is inflatable.

6. The armband as claimed in claim 5 , wherein the setting device comprises an air pump configured to inflate the armband to set the predetermined contact pressure.

7. The armband as claimed in claim 5 , wherein the setting device comprises a sensor apparatus for measuring a current contact pressure on the arm, a control apparatus for providing a control signal depending on the measured current contact pressure, and an air pump, controlled by the provided control signal, for inflating the armband.

8. The armband as claimed in claim 1 , wherein the transmitter and receiver comprise electrodes.

9. The armband as claimed in claim 1 , wherein the setting device is configured to distribute contact forces uniformly on the arm during detection of the blood picture parameter by the detection device.

10. The armband as claimed in claim 1 , wherein the setting device is configured to provide uniform contact on the arm during detection of the blood picture parameter by the detection device.

11. The armband as claimed in claim 1 , wherein the setting device is configured to keep the contact pressure constant during detection of the blood picture parameter by the detection device.

12. The armband as claimed in claim 1 , further comprising a storage medium for providing information of the predetermined contact pressure.

13. The armband as claimed in claim 1 , wherein the at least one blood picture parameter comprises a glucose concentration in the blood, a lactate concentration in the blood, a lactate concentration in the blood, or an oxygen concentration in the blood.

14. The armband of claim 1 , wherein the transmitter includes at least one transmission antenna configured to generate the at least one radiofrequency electromagnetic wave signal such that either (i) the electric component or (ii) the magnetic component of the at least one radiofrequency electromagnetic wave signal is aligned with the direction of the blood vessel.

15. The armband of claim 14 , wherein the receiver includes at least one reception antenna configured to receive a field component of the at least one radiofrequency electromagnetic wave signal.

16. The armband of claim 15 , wherein the detection device includes a plurality of transmission antennas and a plurality of reception antennas.

17. A method for operating an armband, the method comprising detecting a blood picture parameter of blood in a blood vessel in the arm by coupling at least one radiofrequency electromagnetic wave signal into the blood vessel as a waveguide using an excitation arrangement including a plurality of electrodes configured to generate the at least one radiofrequency electromagnetic wave signal and receive the signal after its transmission through the blood vessel, and setting a contact pressure of the electrodes on the arm to a predetermined contact pressure on the arm.

18. A blood picture parameter detection apparatus, comprising:

an armband configured to contact an arm of a user, the armband having:

a detection device for detecting a blood picture parameter of blood in a blood vessel of the arm, and

a setting device for setting a predetermined contact pressure of the armband on the arm,

wherein:

the detection device comprises electrodes configured to couple at least one radiofrequency electromagnetic wave signal into the blood vessel as a waveguide and receive the signal after its transmission through the blood vessel,

the detection device comprises an excitation arrangement configured to generate the at least one radiofrequency electromagnetic wave signal, and

the setting device is configured to set the contact pressure of the electrodes on the arm to the predetermined contact pressure.

19. A method for operating a blood picture parameter detection apparatus, the apparatus comprising an armband configured to contact an arm of a user, the armband having a detection device for detecting a blood picture parameter of blood in a blood vessel of the arm and a setting device for setting a predetermined contact pressure of the armband on the arm, the method comprising:

detecting a blood picture parameter of blood in a blood vessel in the arm by coupling at least one radiofrequency electromagnetic wave signal into the blood vessel as a waveguide using a mode excitation arrangement configured to generate the at least one radiofrequency electromagnetic wave signal and receiving the signal after its transmission through the blood vessel, and

setting a predetermined contact pressure of the armband on the arm, wherein the setting device is configured to set the contact pressure of the electrodes on the arm to the predetermined contact pressure.