Devices and methods for CPR chest compression with active decompression.

The present disclosure provides a medical stimulation system that includes a plurality of implantable channels each operable to obtain a voltage signal from a designated area of a body tissue. The medical stimulation system includes an impedance measurement device. The impedance measurement device includes a plurality of attenuators each coupled to a respective one of the channels. The attenuators are each operable to attenuate an amplitude of the voltage signal received from its respectively-coupled channel. The impedance measurement device includes a multiplexing component that receives the amplitude-attenuated voltage signals from each of the attenuators. The multiplexing component selectively outputs two of the amplitude-attenuated voltage signals. The impedance measurement device includes a differential amplifier that receives the two amplitude-attenuated voltage signals outputted from the multiplexing component as a differential input signal. The differential amplifier generates an amplifier output signal that includes at least partially an amplified version of the differential input signal.

An automated external defibrillator includes: an operation accepter that accepts an operation input from a user; and a self-test executor that executes a self-test for checking a state of the automated external defibrillator when a first condition or a second condition has been satisfied. The first condition is that a setting time instant set in advance comes. The second condition is that the operation accepter accepts a predetermined operation input.

A defibrillation system for the administration of a dual sequential defibrillation and/or simultaneous defibrillation therapy. A first defibrillation device is inductively coupled to a second defibrillation device. An energy delivery of the first defibrillation device generating, or causing to be generated, an artifact that is received by the second defibrillation device. The artifact causing a sync mode, or sync mode circuitry, of the second defibrillation device to administer a second energy delivery. The second energy delivery can be delayed relative to the energy delivery by the first defibrillation device.

An implantable medical device includes a plurality of electrodes to detect electrical activity, a motion detector to detect mechanical activity, and a controller to determine at least one electromechanical interval based on at least one of electrical activity and mechanical activity. The activity detected may be in response to delivering a pacing pulse according to an atrioventricular (AV) pacing interval using the second electrode. The electromechanical interval may be used to adjust the AV pacing interval. The electromechanical interval may be used to determine whether cardiac therapy is acceptable or whether atrial or ventricular remodeling is successful.

An automated age detection system employing a patient monitoring lead assembly and a patent monitoring device. In operation, the patient monitoring lead assembly conducts electrical activity of a heart of a patient to the patient monitoring device. In response thereto, the patient monitoring device classifying the patient as an adult patient or a pediatric patient as a function of electrocardiogram feature(s) derived from electrocardiogram measurement(s) of the electrical heart activity. The patient monitoring device may further estimate the age as a function of electrocardiogram feature(s). The classification facilitates an appropriate application of an adult analysis or a pediatric analysis of the electrical heart activity.

An implantable medical device configured to be planted within a subject. The medical device comprises: a first unit configured to detect pulses and output a first pulse to perform a first treatment; a second unit configured to output a second pulse to perform a second treatment; and_a control unit electrically connected to the first unit and the second unit. The control unit is configured to monitor activities of the first unit and the second unit. The control unit is also configured to prevent the first unit from mistakenly outputting the first pulses or failing to output the first pulses when a first body part of the subject needs the first pulses for the first treatment.

A circuit with low voltage energy storage for use in generating a defibrillation waveform is described. A charging circuit includes a pulse capacitor that stores defibrillation energy, a high voltage generator circuit that includes a transformer and a rectification circuit through which the pulse capacitor is charged with the defibrillation energy, and a discharge and polarity control circuit electrically connected to the pulse capacitor and switchable to receive the defibrillation energy, which is output as a defibrillation waveform. A low voltage energy supplementing circuit is electrically connected to the pulse capacitor in line with the high voltage generator circuit and stores supplemental defibrillation energy. A microcontroller is adapted to enable the low voltage energy supplementing circuit to modulate the delivery of the stored supplemental energy to the pulse capacitor to augment the defibrillation energy derived from\the initial defibrillation waveform.

Systems and methods related to the field of cardiac resuscitation, and in particular to devices for assisting rescuers in performing cardio-pulmonary resuscitation (CPR).

A lead impedance stimulation architecture and a dual current source and sink methodology to output a biphasic current pulse and measure a resulting induced voltage across the stimulation electrodes to determine lead impedance. A common mode capacitance on the electrode interface may have little impact on the stimulation architecture of this disclosure allowing for fast voltage rise time and consistent and accurate impedance measurement. In addition, the dual source and sink includes a monitor circuit on each of the source and the sink circuitry. In the event of an open circuit indicating a lead breakage, loose connection, lead migration, insulation leak, and so on, the monitor circuit may provide an output to indicate specifically which electrode is unable to reach the correct current stimulation amplitude. In this manner the techniques of this disclosure, may also detect a lead break in a single lead impedance measurement.