Cautery override safety systems endoscopic electrosurgical sucti

Details Cautery override safety systems endoscopic electrosurgical sucti Cautery override safety systems endoscopic electrosurgical sucti

1992-10-09

1994-05-17

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Infrared, visible light, ultraviolet, x-ray or electrical...

604 30, 606 37, 606 42, 606 46, A61M 100

Patent

active

053123271

ABSTRACT:
An electrocautery suction/irrigation endoscopic instrument having an electrocautery safety override is provided. The instrument preferably includes a cannula, an irrigation conduit in fluid communication with the cannula, an irrigation valve for regulating fluid flow in the irrigation conduit, an actuator coupled to the valve, an electrocautery probe coupled to a source of current, and an electrical switch coupled to the source of current and to either the irrigation valve or to the actuator. When the actuator is activated to permit fluid flow through the irrigation conduit, the switch is switched and prevents the flow of cautery current from the current source to the electrocautery probe. Preferably, the switch opens a DC circuit which is used to signal the current source to provide an high voltage AC electrocautery current. Alternatively, the switch may be located in the high voltage AC circuit. Both foot and thumb activated cut/coag switches are disclosed for use with the instrument.

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