Device for acquiring physiological variables measured in a body
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 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. A system comprising:
a receiver configured to receive both (i) a signal representing a measured aortic blood pressure value measured by an aortic pressure sensor, and (ii) a signal representing a measured distal blood pressure value measured by a distal pressure sensor of a sensor guide wire, the receiver comprising a processor configured to calculate a metric indicating an extent of a stenosis in a blood vessel, the metric being based on at least the measured aortic blood pressure value and the measured distal blood pressure value, and a display configured to display said metric;
a communication interface configured to (i) receive a signal representing the measured aortic blood pressure value from the aortic pressure sensor via a wired connection between the aortic pressure sensor and the communication interface, and (ii) provide a signal representing the measured aortic blood pressure value to the receiver via a wireless connection between the communication interface and the receiver; and
a sensor guide wire connector configured to (i) receive a signal representing the measured distal blood pressure value via a connection between the distal pressure sensor and the sensor guide wire connector, and (ii) send a signal representing the measured distal blood pressure value to the receiver via a wired connection between the sensor guide wire connector and the receiver.
2. The system of claim 1 , wherein the communication interface is configured to eavesdrop on the signal representing the measured aortic blood pressure value by electrically tapping into a conductor of a wired aortic channel at a location between the aortic pressure sensor and a monitoring device without affecting the measured aortic blood pressure value.
3. The system of claim 2 , wherein the wired aortic channel comprises a standard communication cable for connecting the aortic pressure sensor to the monitoring device, and the communication interface is pre-mounted on the standard communication cable.
4. The system of claim 2 , wherein the wired aortic channel comprises a standard communication cable for connecting the aortic pressure sensor to the monitoring device, and the communication interface is connectable to the standard communication cable such that connectors of the wired aortic channel to the monitoring device can be disconnected and reconnected via the communication interface.
5. The system of claim 1 , wherein the communication interface is configured to eavesdrop on the signal representing the measured aortic blood pressure value by sensing at least one of a magnetic field or an electric field in the vicinity of a wired aortic channel at a location between the aortic pressure sensor and a monitoring device without affecting the measured aortic blood pressure value.
6. The system of claim 5 , wherein the wired aortic channel comprises a standard communication cable for connecting the aortic pressure sensor to the monitoring device, and the communication interface is pre-mounted on the standard communication cable.
7. The system of claim 5 , wherein the wired aortic channel comprises a standard communication cable for connecting the aortic pressure sensor to the monitoring device, and the communication interface is connectable to the standard communication cable such that connectors of the wired aortic channel to the monitoring device can be disconnected and reconnected via the communication interface.
8. The system of claim 1 , wherein the communication interface includes at least one battery for supply of power.
9. The system of claim 8 , wherein the communication interface is configured such that the at least one battery is chargeable via a monitoring device.
10. The system of claim 1 wherein the communication interface is configured to be supplied with power from a monitoring device.
11. The system of claim 1 , wherein the sensor guide wire connector is further configured to send a signal representing the measured distal blood pressure value to a monitoring device.
12. The system of claim 11 , wherein the sensor guide wire connector is configured to send a signal representing the measured distal blood pressure value to the monitoring device via a wired connection between the sensor guide wire connector and the monitoring device.
13. The system of claim 1 , wherein the metric indicating an extent of a stenosis in a blood vessel is Fractional Flow Reserve (FFR).