Surgery – Instruments – Electrical application
Patent
1995-09-19
1998-07-07
Bahr, Jennifer
Surgery
Instruments
Electrical application
606 50, 606 51, A61B 1736
Patent
active
057761302
ABSTRACT:
A clamping force mechanism for use with electrosurgery allow a user to seal and/or join patient's particular vascular tissue; the mechanism is elongate with user and patient ends. An actuator is at the user end and the effectors are at the patient end. Each effector has a face of an area to contact the particular vascular tissue. A lost motion connection transfers user actuation to the effectors to hold a predetermined clamping force during electrosurgical tissue sealing. A yielding member in the loss motion connection clamps the particular tissue between the faces with a predetermined force. The yielding member is a spring, slip clutch or hydraulic coupling possibly near the actuator. An active electrode is carried on one end effector and a return electrode contacts the tissue so an electrosurgical energy supply connected thereacross delivers energy therebetween. A feedback circuit responds to parameters of energy delivered to tissue. A temperature sensor on one face and an impedance monitor respond to energy delivered. A control applies energy to held tissue to seal and/or join it.
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Buysse Steven P.
Kennedy Jenifer S.
Lands Michael J.
Loeffler Donald R.
Lukianow S. Wade
Bahr Jennifer
Kearney Rosiland
Valleylab Inc.
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