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US 2007/0179433 A1Published application
Pressure sensing
AssigneeGambro Lundia AB
InventorsLennart Jonsson, Johan Drott, Thomas Hertz
Life of this patent
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Abstract
A biological fluid device (703) comprises a pressure sensor (702), which is arranged on the device. The pressure sensor comprises a compressible container, the compression of which is indicative of the pressure, and is capable of wireless communication.
Claims28
A device for transporting biological fluid in at least a part of an extracorporeal circuit, said at least part of the extracorporeal circuit being disposable and comprising:
- at least one pressure sensor configured to be in fluid communication with the biological fluid, the at least one Pressure sensor comprising an electric circuit that is configured to be energized by an applied alternating first electromagnetic field and configured to communicate information indicative of a pressure from the pressure sensor via a second alternating electromagnetic field, wherein the at least one pressure sensor is configured for sensing a difference between a pressure of the biological fluid and a reference pressure.
A method of pressure sensing in a biological fluid using the system 22, comprising the steps:
- providing at least one alternating electromagnetic field;
- sensing the at least one alternating electromagnetic field as modified by a pressure sensor configured to affect a field in dependence on pressure;
- and
- providing the sensed field as a signal that is indicative of the pressure sensed by the sensor.
1 more element
Dependencies are inferred from the claim text.