Cardiac defibrillator

Details Cardiac defibrillator Cardiac defibrillator

A - Human Necessities

61

N

A61N 1/39 (2006.01)

Patent

CA 2063902

CARDIAC DEFIBRILLATOR ABSTRACT OF THE DISCLOSURE Disclosed is a cardiac defibrillator for providing a cardiac defibrillation pulse to a patient. The defibrillator comprises a switch contact (14) mounted on a movable switch (10) that moves between a charge position and a discharge position. In the charge position, the switch contact is coupled to a high-voltage battery (22) in order to provide a charge to an energy storage capacitor (30). When the movable switch is released from the charge position, the switch contactengages an electrode contact (32) and a defibrillation pulse flows into a patient (40). The duration of the cardiac defibrillation pulse can be varied by changing the length of time that the switch contact remains engaged with electrode contact. Also disposed within the switch contact path is a discharge contact (42), which is connected to a discharge resistor (48). When the movable switch is in a discharge position, the switch contact is engaged with the discharge contact thereby allowing the discharge resistor to dissipate charge from the energy storage capacitor. A spring (16) is connected to the movable switch in order to rotate it between the charge and discharge positions. RCT:klp 1/PHYS-5414

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