摘要:
An implantable medical device having at least one elongated electrical function conductor and an electrode pole connected to the at least one elongated function conductor. The at least one elongated function conductor transmits therapeutic signals or diagnostic signals or both. The electrode pole delivers electrical current or field or sense electrical potentials, or both, in surrounding tissue during use. The implantable medical device includes a sensing device connected to a field-generating electrode pole, a potential-sensing electrode pole, and a reference pole. The sensing device detects generated electrical potentials via the potential-sensing electrode pole in relation to the reference pole, and generates an output signal that represents a detected electrical potential. The implantable medical device includes a control device connected to the sensing device to evaluate an output signal generated by the sensing device, and to control the medical device as a function of the potential detected by the sensing device.
摘要:
A temporarily or permanently implantable medical device having at least one elongated electrical function conductor for transmitting therapeutic signals or diagnostic signals or both. At least one additional conductor is provided which together with the function conductor forms, at least in places, a double line which is separated from the function conductor by a dielectric and which is coupled to the function conductor via a coupling impedance. The coupling impedance is dimensioned so that the value of the line wave impedance of the function conductor for frequency ranges far above a frequency range of the therapeutic or diagnostic signals is much greater than the in the frequency range of the therapeutic or diagnostic signals, so that currents in a frequency range above the frequency range of the therapeutic or diagnostic signals are damped more intensely than the currents which form therapeutic or diagnostic signals.
摘要:
A device for generating opposing fields for shielding an implant in the body of a patient during a magnetic resonance imaging, which device comprises a field generation unit with one or more field generation configured to generate field pulses and a control unit coupled with the field generation unit, and which is configured in such a manner that field pulses can be generated as opposing fields through which, within a spatial zone which contains the implant at least in sections, high-frequency electromagnetic field pulses and/or magnetic gradient field pulses used during the magnetic resonance imaging can be reduced or cancelled out in their intensity through superposition.
摘要:
Device and method for detecting electromagnetic fields occurring in imaging magnetic resonance tomography MRT/MRI tests. Relates to an implantable medical device (IMD) comprising a hermetically sealed housing, control unit(s), detection unit(s) for MRT interference fields connected/connectable to control unit(s) and to electrode(s) and/or to antenna(s) and/or coil(s), wherein the MRT interference detection unit contains at least one electro-optical converter which converts induced voltages from the electrode(s) and/or the antenna(s) and/or the coil(s) to optical signals, which are optically transmitted in a potential-free manner within the detection unit for MRT interference fields to an evaluation unit for the detection unit for MRT interference fields, and when a threshold for the optical signal and/or a predetermined periodic occurrence of the optical signals is exceeded, the evaluation unit triggers switching to an MRI-safe state or transmits a corresponding signal to the control unit(s).
摘要:
An implantable electromedical device, having a detection unit for capturing possible device-impairing effects, a control unit, which is connected to the detection unit, a diagnostic and/or treatment unit, and a test unit, of which the test unit is designed to test the diagnostic-treatment unit, and to output test results for storage, of which the diagnostic and/or treatment unit includes sensor units and/or treatment delivery units as components and is designed to record physiological parameters and/or bring about delivery of a treatment, and of which the control unit is designed to actuate the test unit for testing the diagnostic-treatment unit.
摘要:
A single-chamber heart stimulator has an electrically conductive housing, first and second detection units, and a VT/SVT discrimination unit. The first detection unit is connected to an electrode pair of a ventricular electrode lead for obtaining a first electrocardiogram signal recorded in bipolar fashion, and is designed to sense and classify ventricular heartbeats. The second detection unit is connected on one side to an electrode of the ventricular electrode lead, and on the other side to the electrically conductive housing, for obtaining a second electrocardiogram signal containing signal features characteristic of atrial heartbeats. The VT/SVT discrimination unit is connected to the first and second detection units, and effects discrimination between ventricular and supraventricular tachycardias based on ventricular heartbeats measured through the first detection unit, and on atrial heartbeats measured through the second detection unit to the extent the rate of measured ventricular heartbeats exceeds a threshold value (VT zone threshold).
摘要:
The disclosure relates to a device and a method for detecting electromagnetic fields, in particular fields occurring in imaging magnetic resonance tomography.
摘要:
An implantable electrode lead including an elongated electrode lead body having a proximal end and a distal end, at least one electrical supply lead which is enclosed in an electrically insulating material to electrically insulate the supply leads against the surroundings of the electrode lead, at least one electrically active surface which is disposed on the distal end, or in the vicinity thereof, and is connected to the at least one electrical supply lead, by way of which therapeutic signals can be output and/or diagnostic signals can be received, a plug disposed on the proximal end, which is electrically connected to the at least one electrical supply lead and can be connected to an electro-medical implant, and at least one preformed and/or stiffened section of the electrode lead body, which has an additional preformation and/or stiffening structure, by way of which the section is preformed and/or stiffened.
摘要:
A battery-powered electrical device is disclosed, which may be implemented as an implantable medical device, wherein the device contains at least one battery voltage monitoring unit which is designed to monitor a voltage profile at a battery during the charging of a capacitor, via a transformer in a charging circuit, and which on the basis of the voltage characteristic is able to specify a magnetic presaturation of the transformer, and one control unit which terminates the charging process whenever a predefined threshold value for the magnetic presaturation of the transformer is exceeded.
摘要:
A combination cardiac stimulator for CRT stimulation and CCM stimulation, which is connected to a rhythm evaluation unit which can either detect a sinus rhythm that is present, or classify an atrial arrhythmia, and which comprises an additional therapy selection unit, wherein the therapy selection unit selects the delivery of either CRT therapy or CCM therapy on the basis of the classification of the atrial rhythm such that CRT therapy is preferred in the case of sinus rhythm, and CCM therapy is delivered in the case of atrial arrhythmia.