Surgical device for applying radio frequency energy to a portion of a captured vessel

A method for applying radio frequency energy to a portion of a captured vessel, the method comprising:

• providing a first tube having an internal lumen for passage of a viewing device therein, the first tube having a substantially transparent first window at a distal tip thereof and providing a second tube slidingly disposed over the first tube, the second tube having a substantially transparent second window at a distal tip thereof, the second tube further having a slot for capturing a portion of a vessel, at least one electrode being affixed to one of the inner or outer surfaces and facing the other of the inner or outer surfaces;
• viewing the vessel through the first and second windows;
• capturing a portion of the vessel in the slot;
• sliding the second tube relative to the first tube between open and closed positions, wherein in the closed position an inner surface of the second window is aligned with an outer surface of the first window to sandwich the portion of vessel therebetween;
• and
• applying radio frequency energy to the at least one electrode to cauterize the captured portion of vessel.