Device for determining thoracic impedance
First Claim
1. 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 and 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 first and second current pulses of variable pulse duration;
and wherein the control unit is programmed at least at first and second different points in time to cause the measuring signal generator to generate and emit the first current pulse and the second current pulse, so that emission of the first current pulse is finished before emission of the second current pulse starts, and the pulse duration of the emitted first and second current pulses are different;
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 unitby measuring a first voltage at the beginning of a specific period of time that ends when emitting the first current pulse ends, and to issue the first voltage as a voltage value which represents the measured first voltage; and
by measuring a second voltage at the beginning of said specific period of time that ends when emitting the second current pulse ends, and to issue the second voltage as a voltage value which represents the measured second voltage.
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Accused Products
Abstract
An electromedical implant includes 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 to 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. The measuring signal generator is designed to generate and emit a current pulse or a series of current pulses, and the control unit is designed at a specific point in time to cause the measuring signal generator (to generate and emit a current pulse, 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 after the passing of at least two time periods of different length that start with commencement of the current pulse being emitted and end before the end of emitting the current pulse, and to issue a voltage value which in each case represents the measured voltage.
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Citations
21 Claims
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1. An electromedical implant comprising at least a measuring signal generator;
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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 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 first and second current pulses of variable pulse duration; and wherein the control unit is programmed at least at first and second different points in time to cause the measuring signal generator to generate and emit the first current pulse and the second current pulse, so that emission of the first current pulse is finished before emission of the second current pulse starts, and the pulse duration of the emitted first and second current pulses are different; 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 by measuring a first voltage at the beginning of a specific period of time that ends when emitting the first current pulse ends, and to issue the first voltage as a voltage value which represents the measured first voltage; and by measuring a second voltage at the beginning of said specific period of time that ends when emitting the second current pulse ends, and to issue the second voltage as a voltage value which represents the measured second voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification