The disclosure describes various aspects of an automated external defibrillator (AED) system, including shock generating electronics, a battery configured for providing power to the shock generating electronics, power management circuitry configured for managing the shock generating electronics and the battery, at least one environmental sensor configured for monitoring environmental conditions in which the AED system is placed, and a controller configured for controlling the power management circuitry and the at least one environmental sensor. The at least one environmental sensor includes a temperature sensor configured for providing a temperature measurement, and the controller is further configured for adjusting operations of the power management circuitry in accordance with the temperature measurement provided by the temperature sensor. The disclosure further describes associated methods of using the AED system.

An accessory dock is described, the accessory dock for docking wireless accessories that are configured to be used with a medical device. The accessory dock has at least one docking receptacle configured to receive a wireless accessory. In some examples, the wireless accessory receives power from the medical device upon being positioned within a threshold distance of the medical device to charge a battery of the wireless accessory. In some examples, the wireless accessory pairs with the medical device upon being positioned within a threshold distance of the medical device. In some examples, a processor of the medical device causes performance of an accessory health check upon the wireless accessory being docked in the docking receptacle, the accessory health check for determining a readiness of the wireless accessory.

A compact external defibrillator for use in generating a defibrillation waveform is described. The external defibrillator includes a charging circuit enclosed in a housing. The charging circuit includes a pulse capacitor that stores defibrillation energy, a high voltage generator circuit through which the pulse capacitor is charged with the defibrillation energy, and a discharge and polarity control circuit to receive the defibrillation energy. A low voltage energy supplementing circuit stores supplemental defibrillation energy. A microcontroller enables the low voltage energy supplementing circuit to modulate delivery of the stored supplemental defibrillation energy to the pulse capacitor to augment the defibrillation energy and adjusts the supplemental defibrillation energy stored by switching one or more low voltage ultra-capacitors. Each electrode of a pair are housed in a pad having a substantially same size as one surface of the housing and sides of the housing are directly adjacent to each of the pads.

An external defibrillator for use in generating a defibrillation waveform is described. The external defibrillator includes a low voltage energy storage module having one or more low voltage ultra-capacitors that store low voltage energy. A pulse transformer converts the low voltage energy to high voltage defibrillation energy and provides the defibrillation energy to a pair of electrodes configured to be applied to a patient. A modulator receives the low voltage energy from the low voltage energy storage module and transfers the low voltage energy to the pulse transformer. The external defibrillator also includes a battery.

Improved devices, circuits and methods of operation in implantable stimulus systems. An implantable defibrillator may comprise a charging circuit using a transformer to store and build up energy on an HV capacitor or capacitor stack, with the HV capacitor in turn coupled to an H-bridge output circuit having low and high sides for issuing therapy. A current monitoring circuitry is provided on the low side of the H-Bridge and used to form a feedback loop to control current into a transformer that converts battery voltage to a signal that charges the HV capacitor to control current through the H-bridge.

Improved devices, circuits and methods of operation in implantable stimulus systems. An implantable defibrillator may comprise an H-bridge output circuit having low and high sides, with a current controlling circuit coupled to the high side of the H-bridge output circuit and a current monitoring circuit coupled to the low side of the H-bridge output circuit. Alternate current paths to the output of the H-bridge, or to the H-Bridge itself, are used for delivering different therapies to the patient.

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 system to deliver therapeutic energy to a patient, the system including a storage capacitor configured to store and release the therapeutic energy, a boost converter circuit coupled to the storage capacitor, and a current flow control circuit coupled to the boost converter circuit and including a plurality of control circuits configured to control a current output from the current flow control circuit in a therapeutic biphasic voltage waveform upon release of the therapeutic energy from the storage capacitor, wherein the therapeutic biphasic voltage waveform includes a ramped increase in voltage from approximately zero volts to a desired therapeutic voltage level over a time interval greater than 1 millisecond and less than a time associated with a phase switch.

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

Methods and apparatus for a three-stage ventricular cardioversion and defibrillation therapy that treats ventricular tachycardia and fibrillation at low energy levels. An implantable therapy generator adapted to generate and selectively deliver a three-stage ventricular therapy and at least two leads operably each having at least one electrode adapted to be positioned proximate the ventricle of the patient. The device is programmed to deliver a three-stage therapy via both a far-field configuration and a near-field configuration of the electrodes upon detection of a ventricular arrhythmia. The three-stage therapy includes a first stage for unpinning of one or more singularities associated with the ventricular arrhythmia, a second stage for anti-repinning of the one or more singularities, both of which are delivered via the far-field configuration of the electrodes, and a third stage for extinguishing of the one or more singularities associated delivered via the near-field configuration of the electrodes.