Device for determining thoracic impedance

An electromedical implant comprising at least

• a measuring signal generator;
• an impedance measuring unit to determine the impedance of human or animal tissue;
• a control unit which, for controlling the measuring signal generator and the impedance measuring unit, is at least indirectly connected to the measuring signal generator ad the impedance measuring unit;
• as well as an electrode arrangement comprising at least two electrodes which can be directly or indirectly connected or at least temporarily connected to the measuring signal generator and to the impedance measuring unit, or to a connection for such an electrode arrangement;
• wherein:
• the measuring signal generator is designed to generate and emit current pulses of variable pulse duration;
• and wherein the control unit is designed at least at two different points in time to cause the measuring signal generator to generate and emit a current pulse, so that emission of the first current pulse is finished before emission of the second current pulse starts, and to differentiate between the pulse durations of the emitted current pulses;
• and to cause the impedance measuring unit to measure the voltage that is present between the electrodes connected to the measuring signal generator and the impedance measuring unit at the beginning of a specific period of time that ends when emitting the respective current ends, and to issue it as a voltage value which represents the measured voltage.

An electromedical implant comprising:

• a measuring signal generator;
• an impedance measuring unit to determine the impedance of human or animal tissue;
• a control unit which, for controlling the measuring signal generator and the impedance measuring unit, is at least indirectly connected to the measuring signal generator and the impedance measuring unit;
• as well as an electrode arrangement comprising at least two electrodes which are adjusted to be directly or indirectly connected, or at least temporarily connected, to the measuring signal generator and to the impedance measuring unit, or to a connection for such an electrode arrangement;
• wherein:
• the measuring signal generator is designed to generate and emit sinusoidal currents of at least two different frequencies;
• and wherein the impedance measuring unit is designed to measure the amplitude of at least one sinusoidal voltage and/or the phase relationship between two sinusoidal voltages and to issue the value as a voltage value which represents the measured amplitude or the measured phase relationship or both.