Cardiac pacemaker with combined defibrillation and electrosurger

Details Cardiac pacemaker with combined defibrillation and electrosurger Cardiac pacemaker with combined defibrillation and electrosurger

1987-03-23

1989-01-10

Jaworski, Francis

Surgery

Truss

Pad

128419D, 128908, A61N 100, H05G 0000

Patent

active

047966300

ABSTRACT:
A cardiac pacemaker is provided which has combined defibrillation and electrosurgery protection. The pacemaker includes an implantable housing with a pacing circuit located within the housing and means for attaching a lead to the housing. A protection circuit is located between the pacing circuit and the attaching means. The protection circuit comprises a zener diode and a capacitor connected across the zener diode. The capacitor has a value to provide a relatively low impedance with respect to electrosurgery frequencies and a relatively high impedance with respect to cardiac myopotential frequencies.

REFERENCES:
patent: 3518986 (1967-11-01), Woods et al.
patent: 3968802 (1976-07-01), Ballis
patent: 4147162 (1979-04-01), Gatzke
patent: 4153049 (1979-05-01), Gatzke et al.
patent: 4165749 (1979-08-01), Cansell
patent: 4168711 (1979-09-01), Cannon, III et al.
patent: 4202340 (1980-05-01), Langer et al.
patent: 4263919 (1981-04-01), Levin
patent: 4301801 (1981-11-01), Schneiderman
patent: 4440172 (1984-04-01), Langer
patent: 4595009 (1986-06-01), Leinders

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