A first, second and third electrode, an electrode contact detection means configured to detect and output a state in which all of the electrodes are in contact with a surface of a measurement target, and control means configured to execute a measurement process of biological information, wherein the electrode contact detection means includes a bias power source configured to apply a voltage to each of the first electrode and the second electrode, a first comparator and a second comparator, and a contact state determination unit configured to determine whether all of the electrodes are in contact with the surface of the measurement target based on outputs of the first comparator and the second comparator, and the control means is configured to execute a process for opening the bias power source and executes the measurement process only when all electrodes are in contact with the surface of the measurement target.

A first, second and third electrode, an electrode contact detection means configured to detect and output a state in which all of the electrodes are in contact with a surface of a measurement target, and control means configured to execute a measurement process of biological information, wherein the electrode contact detection means includes a bias power source configured to apply a voltage to each of the first electrode and the second electrode, a first comparator and a second comparator, and a contact state determination unit configured to determine whether all of the electrodes are in contact with the surface of the measurement target based on outputs of the first comparator and the second comparator, and the control means is configured to execute a process for opening the bias power source and executes the measurement process only when all electrodes are in contact with the surface of the measurement target.

The electrocardiogram measurement apparatus includes: two amplifiers for receiving electrocardiogram signals from a first electrode and a second electrode; one electrode driving unit; a third electrode for receiving an output of the electrode driving unit; an A/D converter connected to an output terminal of each of the two amplifiers and converting analog signals into digital signals; a microcontroller for receiving the digital signals from the A/D converter; and a communication means for transmitting the digital signal, wherein: the microcontroller is supplied with power from a battery; the microcontroller controls the A/D converter and the communication means; and each of the two amplifiers amplifies one electrocardiogram signal so as to simultaneously measure two electrocardiogram signals.

A signal measurement method and a signal measurement apparatus (1000) are provided. A mode selection switch (11) may be used to enable a multi-lead measurement mode, to obtain signals of a plurality of leads and a status of a user. When quality of the signals of the plurality of leads is good or the user is in a static state, extracted features of the signals of the plurality of leads are output. When the signals of the plurality of leads are poor and the user is in a moving state, the mode selection switch (11) is used to switch to a single-lead mode with right leg drive, to obtain a signal of a single lead. A common-mode signal is eliminated from the signal of the single lead by using a negative feedback of a right leg drive electrode, and a feature of the signal of the single lead is output.

A signal measurement method and a signal measurement apparatus (1000) are provided. A mode selection switch (11) may be used to enable a multi-lead measurement mode, to obtain signals of a plurality of leads and a status of a user. When quality of the signals of the plurality of leads is good or the user is in a static state, extracted features of the signals of the plurality of leads are output. When the signals of the plurality of leads are poor and the user is in a moving state, the mode selection switch (11) is used to switch to a single-lead mode with right leg drive, to obtain a signal of a single lead. A common-mode signal is eliminated from the signal of the single lead by using a negative feedback of a right leg drive electrode, and a feature of the signal of the single lead is output.

A device for accurately recording and presenting an electrocardiograph (ECG) signal collected by the non-optimal dry metal electrodes of wearable devices includes a first collecting module, a filtering module, a second collecting module, and a controlling module. The first collecting module collects a first ECG signal which is filtered to obtain a high frequency ECG signal and a low frequency ECG signal. The second collecting module collects the high frequency ECG signal and the low frequency ECG signal. The controlling module performs combination processing on the high frequency ECG signal and the low frequency ECG signal, then outputting an effective and accurate ECG signal. The present disclosure also provides a method for detecting and presenting an accurate electrocardiograph signal obtained by a wearable device.

A device for accurately recording and presenting an electrocardiograph (ECG) signal collected by the non-optimal dry metal electrodes of wearable devices includes a first collecting module, a filtering module, a second collecting module, and a controlling module. The first collecting module collects a first ECG signal which is filtered to obtain a high frequency ECG signal and a low frequency ECG signal. The second collecting module collects the high frequency ECG signal and the low frequency ECG signal. The controlling module performs combination processing on the high frequency ECG signal and the low frequency ECG signal, then outputting an effective and accurate ECG signal. The present disclosure also provides a method for detecting and presenting an accurate electrocardiograph signal obtained by a wearable device.

Systems, devices, and methods for electroporation ablation therapy are disclosed, with a protection device for isolating electronic circuitry, devices, and/or other components from a set of electrodes during a cardiac ablation procedure. A system can include a first set of electrodes disposable near cardiac tissue of a heart and a second set of electrodes disposable in contact with patient anatomy. The system can further include a signal generator configured to generate a pulse waveform, where the signal generator coupled to the first set of electrodes and configured to repeatedly deliver the pulse waveform to the first set of electrodes. The system can further include a protection device configured to selectively couple and decouple an electronic device to the second set of electrodes.

A pacemaker system includes a drive-sense circuit (DSC) operably coupled to a pacemaker lead. The DSC generates a pace signal including electrical impulses based on a reference signal. The DSC provides the pace signal via the pacemaker lead to an electrically responsive portion of a cardiac conductive system of a subject to facilitate cardiac operation of a cardiovascular system of the subject. The DSC senses, via the pacemaker lead, cardiac electrical activity of the cardiovascular system of the subject that is generated in response to the pace signal and electrically coupled into the pacemaker lead and generates a digital signal that is representative of the cardiac electrical activity of the cardiovascular system of the subject that is sensed via the pacemaker lead. The DSC provides digital information to one or more processing modules that includes and/or is coupled to memory and that provide the reference signal to the DSC.

A system and method directed to detecting placement of a medical device within a patient body, the system including a medical device including an optical fiber having core fibers. Each of the one or more core fibers can include a plurality of sensors each configured to reflect a light signal having an altered characteristic due to strain experienced by the optical fiber. The system can further include logic configured to determine a 3D shape of the medical device in accordance with the strain of the optical fiber. The logic can be configured to define a reference plane for the 3D shape and render an image of the 3D shape on a display of the system in accordance with the reference plane.