Patent ID: 8190254

Claim:
A defibrillator for an external administration to a patient, comprising an energy storage unit for emitting a defibrillation shock and having a capacitor unit with at least one capacitor (C 1 , C 2 , C 3 ), the defibrillator further comprising: a plurality of capacitor units with capacitances matched to various patient impedances adapted to be interchangeably coupled to the defibrillator; a plurality of receiving modules ( 1 ), wherein each of the capacitor units are contained in a respective one of the plurality of receiving modules ( 1 ) and adapted to be interchangeably coupled to the defibrillator; wherein the defibrillator has a measuring device ( 11 ) for detecting a patient impedance and a data output ( 9 ) is assigned to one of the capacitor unit, which is matched to the impedance; and wherein the defibrillator is formed as a device to be permanently worn by a patient and the measuring device continuously monitors the patient impedance and has an evaluation device and the evaluation device issues a warning signal if a predetermined limit is exceeded or undershot with an occurrence of a change in the patient impedance.