Abstract: A heater (100) for thawing/warming a perishable dielectric load (130) contains: a heating chamber (140) for holding the perishable dielectric load (130) during thawing/warming thereof, a transmitter unit (110) generating electromagnetic energy (RFs) having predefined spectral properties, an emitting element (150) producing an electromagnetic field in the perishable dielectric load (130) based on the electromagnetic energy (RFs) from the transmitter unit (110), a tuning circuit (115) adjusting an overall impedance (Z) of the emitting element (150), the tuning circuit (115) and the heating chamber (140) so that the overall impedance (Z) matches an output impedance of the transmitter unit (110), and a control unit (120) measuring the overall impedance (Z) during thawing/warming of the perishable dielectric load (130) and repeatedly generating at least one control signal (Tn) causing the tuning circuit (115) to adjust the overall impedance (Z) to match the output impedance of the transmitter unit (110).

Abstract: A cartridge holds a perishable dielectric load, e.g. blood plasma, during heating n a heating chamber by means of an electromagnetic field from an emitting element. A conducting container of the cartridge is arranged between the emitting element and the perishable dielectric load. The conducting container holds dielectric matter and is arranged in contact with a load container for the perishable dielectric load, so that energy from the electromagnetic field is bridged into the perishable dielectric load. A first surface of the cartridge faces the emitting element and contains a recess for receiving any fluid having leaked out from the conducting container and/or the load container. A transmitter module for generating the electromagnetic energy repeatedly measures an impedance of the perishable dielectric load and the conducting container. If, due to any fluid being located in the recess, the impedance deviates substantially from a previous measurement, an alarm signal is generated.

Abstract: A heater (100) for thawing/warming a perishable dielectric load (130) contains: a heating chamber (140) for holding the perishable dielectric load (130) during thawing/warming thereof, a transmitter unit (110) generating electromagnetic energy (RFs) having predefined spectral properties, an emitting element (150) producing an electromagnetic field in the perishable dielectric load (130) based on the electromagnetic energy (RFs) from the transmitter unit (110), a tuning circuit (115) adjusting an overall impedance (Z) of the emitting element (150), the tuning circuit (115) and the heating chamber (140) so that the overall impedance (Z) matches an output impedance of the transmitter unit (110), and a control unit (120) measuring the overall impedance (Z) during thawing/warming of the perishable dielectric load (130) and repeatedly generating at least one control signal (Tn) causing the tuning circuit (115) to adjust the overall impedance (Z) to match the output impedance of the transmitter unit (110).

Abstract: A cartridge holds a perishable dielectric load, e.g. blood plasma, during heating n a heating chamber by means of an electromagnetic field from an emitting element. A conducting container of the cartridge is arranged between the emitting element and the perishable dielectric load. The conducting container holds dielectric matter and is arranged in contact with a load container for the perishable dielectric load, so that energy from the electromagnetic field is bridged into the perishable dielectric load. A first surface of the cartridge faces the emitting element and contains a recess for receiving any fluid having leaked out from the conducting container and/or the load container. A transmitter module for generating the electromagnetic energy repeatedly measures an impedance of the perishable dielectric load and the conducting container. If, due to any fluid being located in the recess, the impedance deviates substantially from a previous measurement, an alarm signal is generated.

Abstract: This invention is about a method and a device for equalizing warming processes in dielectric loads using electric/electromagnetic fields at frequencies below 900 MHz. Characteristic for the invention is that the load is surrounded by a field equalizing material and that the load and the electric/electromagnetic field is moved relative to each other.

Abstract: This invention is about a method and a device for equalizing warming processes in dielectric loads using electric/electromagnetic fields at frequencies below 900 MHz. Characteristic for the invention is that the load is surrounded by a field equalizing material and that the load and the electric/electromagnetic field is moved relative to each other.

Abstract: A pressure and heart movement sensor for a heart stimulator, includes an electrode system for implantation with an electrode cable containing at least two electrical conductors leading to electrode poles. A measurement device is arranged to measure an electrical quantity between the electrical conductors, which quantity varying according to the pressure applied to the electrode cable. Alternately, the electrode cable contains at least one electrical conductor, and the measurement device is arranged to measure the impedance between the conductor and ambient medium and to deliver an output signal, which varies according to the impedance measured, when the electrode cable is subjected to pressure.