DEFIBRILLATOR APPARATUS AND METHOD

摘要

An apparatus and method for delivering an electrical defibrillation signal to a heart (36) transcutaneously. The apparatus (1 ) includes an external transmitter part (5) and implantable receiver part (3) arranged so that an RF pulse (22, 24) can be wirelessly transmitted through a barrier (29) and received internally to apply a defibrillating pulse to a heart (36). The oscillator (22) and the keying unit (24) are powered via a power source (2). The external transmitter (5) comprises a capacitor arrangement (8) connected to the power source (2) and a high voltage DC to DC converter (6), The capacitor (8) is connected through a resonant circuit (10) to circuitry (16, 18) operable to discharge the capacitor (8) through the resonant circuitry (10) and excite the primary coil (12) and cause RF pulse transmission. The primary coil (12) is inductively coupled to the secondary coil (30) of the implantable receiver (3), to enable instant wireless transmission of the RF pulse across the barrier (29). The receiver (3) further comprises a resonant circuit, rectification circuitry (32) and filtering circuitry (34).