Electrosurgical trocar assembly

Details Electrosurgical trocar assembly Electrosurgical trocar assembly

1994-01-27

1997-02-04

Pellegrino, Stephen C.

Surgery

Instruments

Electrical application

606 41, 606 42, 604 21, 604164, A61B 1732

Patent

active

055993486

ABSTRACT:
A trocar assembly includes an elongate trocar device and a surrounding cannula. The trocar device incorporates an electrosurgical cutting element which is used to make a guide hole for the cannula and thus enables the remainder of the trocar assembly to enlarge the puncture. An electronic control circuit senses the current flow to the cutting element and, when the trocar device breaks through the wall of the organ being cut, this circuit cuts off the connection to the associated electrosurgical generator. Further control circuitry prevents a surgeon from resuming electrosurgery until a predetermined time period has elapsed. Multiple trocars of different diameters are provided for the same assembly.

REFERENCES:
patent: 3359982 (1967-12-01), Guiorguien
patent: 3595239 (1971-07-01), Petersen
patent: 3812858 (1974-05-01), Oringer
patent: 4170234 (1979-10-01), Graham
patent: 4788977 (1988-12-01), Farin et al.
patent: 4986814 (1991-01-01), Burney et al.
patent: 5071419 (1991-12-01), Rydell et al.
patent: 5088997 (1992-02-01), Delahuerga et al.
patent: 5100402 (1992-03-01), Fan
patent: 5300070 (1994-04-01), Gentelia et al.
patent: 5344420 (1994-09-01), Hilal et al.

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