Device for acquiring physiological variables measured in a body
View Patent ↗An eavesdropping arrangement for acquiring a measured physiological variable of an individual includes a receiver and a communication interface in a housing separate from the receiver. The communication interface is positioned along a communication link between a first sensor, which is configured to measure aortic blood pressure and to provide a signal representing measured aortic blood pressure, and a central monitoring device configured to monitor the measured aortic blood pressure. The communication interface includes a high impedance connection to the communication link that permits the communication interface to eavesdrop on the signal representing measured aortic blood pressure such that information representing measured aortic blood pressure is sent to the receiver while allowing the central monitoring device to receive and use the signal representing measured aortic blood pressure.
1. An eavesdropping system for acquiring a measured physiological variable of an individual, said eavesdropping system comprising:
an aortic pressure sensor configured to measured aortic blood pressure and provide a signal representing measured aortic blood pressure;
a central monitoring device configured to be located external to said individual and configured to receive the signal representing measured aortic blood pressure;
a wired aortic channel extending from the aortic pressure sensor to the central monitoring device;
a communication interface configured to be arranged along the wired aortic channel; and
a receiver configured to receive a measured aortic blood pressure signal, the receiver being in a housing separate from the communication interface,
wherein the communication interface is configured to perform at least one of:
(i) electrically tapping into a conductor of the wired aortic channel at a location between the aortic pressure sensor and the central monitoring device without affecting the signal carried over the wired aortic channel, and
(ii) sensing at least one of a magnetic field and an electric field in the vicinity of the wired aortic channel that is created by the signal passing through a conductor of the wired aortic channel at a location between the aortic pressure sensor and the central monitoring device without affecting the signal carried over the wired aortic channel,
wherein the communication interface is configured to transmit the measured aortic blood pressure signal to the receiver, via a wireless connection between the communication interface and the receiver.
2. The system of claim 1 , wherein the communication interface includes at least one battery for supply of power.
3. The system of claim 2 , wherein the communication interface is configured such that the at least one battery is chargeable via the central monitoring device.
4. The system of claim 1 , wherein the wired aortic channel comprises a standard communication cable for connecting the aortic pressure sensor to the central monitoring device, and
wherein the communication interface is pre-mounted on the standard communication cable.
5. The system of claim 1 , wherein the wired aortic channel comprises a standard communication cable for connecting the aortic pressure sensor to the central monitoring device, and
wherein the communication interface is connectable to the standard communication cable, such that connectors of the wired aortic channel to the central monitoring device can be disconnected and reconnected via the communication interface.
6. The system of claim 1 , wherein the communication interface is configured to be supplied with power from the central monitoring device.
7. The system of claim 1 , wherein the communication interface is configured to perform said electrically tapping into the conductor of the wired aortic channel at the location between the aortic pressure sensor and the central monitoring device without affecting the signal carried over the wired aortic channel.
8. The system of claim 1 , wherein the communication interface is configured to perform said sensing at least one of the magnetic field and the electric field in the vicinity of the wired aortic channel that is created by the signal passing through the conductor of the wired aortic channel at the location between the aortic pressure sensor and the central monitoring device without affecting the signal carried over the wired aortic channel.
9. An eavesdropping system for acquiring a measured physiological variable of an individual, comprising:
an aortic pressure sensor configured to measure aortic blood pressure of the individual and to provide a signal representing the measured aortic blood pressure;
a distal pressure sensor configured to measure distal blood pressure of the individual and to provide a signal representing the measured distal blood pressure;
a central monitoring device configured to receive the signal representing measured aortic blood pressure;
a communication interface that is arranged along a wired aortic channel, the wired aortic channel extending from the aortic pressure sensor to the central monitoring device;
a control unit configured to receive the signal representing the measured distal blood pressure via a wired connection between the distal pressure sensor and the control unit, the control unit being in a housing separate from the communication interface; and
a receiver configured to receive a measured aortic blood pressure signal, the receiver being in a housing separate from the communication interface and the control unit,
wherein the communication interface is configured to perform at least one of:
(i) electrically tapping into a conductor of the wired aortic channel at a location between the aortic pressure sensor and the central monitoring device without affecting the signal carried over the wired aortic channel, and
(ii) sensing at least one of a magnetic field and an electric field in the vicinity of the wired aortic channel that is created by the signal passing through a conductor of the wired aortic channel at a location between the aortic pressure sensor and the central monitoring device without affecting the signal carried over the wired aortic channel,
wherein the communication interface is configured to transmit the measured aortic blood pressure signal to the receiver, via a wireless connection between the communication interface and the receiver, and
wherein the control unit is configured to send the signal representing the measured distal blood pressure to both the receiver and the central monitoring device.
10. The system of claim 9 , wherein the control unit is configured to send the measured distal blood pressure to the receiver via a wired connection between the control unit and the receiver, and the control unit is configured to send the measured distal blood pressure to the central monitoring device via a wired connection between the control unit and the central monitoring device.
11. The system of claim 9 , wherein the control unit is configured to send the measured distal blood pressure to the receiver via a wireless connection between the control unit and the receiver, and the control unit is configured to send the measured distal blood pressure to the central monitoring device via a wireless connection between the control unit and the central monitoring device.
12. The system of claim 9 ,
wherein the wired aortic channel comprises a standard communication cable for connecting the aortic pressure sensor to the central monitoring device, and
wherein the communication interface is pre-mounted on the standard communication cable.
13. The system of claim 9 ,
wherein the wired aortic channel comprises a standard communication cable for connecting the aortic pressure sensor to the central monitoring device, and
wherein the communication interface is connectable to the standard communication cable, such that connectors of the wired aortic channel to the central monitoring device can be disconnected and reconnected via the communication interface.
14. The system of claim 9 , wherein the communication interface includes at least one battery for supply of power.
15. The system of claim 14 , wherein the communication interface is configured such that the at least one battery is chargeable via the central monitoring device.
16. The system of claim 9 , wherein the communication interface is configured to be supplied with power from the central monitoring device.