Surgical system and method

Details Surgical system and method Surgical system and method

2006-05-30

2006-05-30

Rollns, Rosiland (Department: 3739)

Surgery

Instruments

Electrical application

C606S048000, C606S049000, C606S050000

Reexamination Certificate

active

07052494

ABSTRACT:
A surgical instrument comprises at least two elongate hollow tubes (14, 15), each having an aperture (18) at the distal end portion. The inner tube (14) is disposed within the other tube (15), and is mounted for rotation about its longitudinal axis. A cutting tool (4) is located at the distal end of the tube (14), and is positioned adjacent to the apertures (18). A motor (5) is provided for rotating the inner tube (14), and the inner tube (14) has a central lumen (21) through which tissue cut by the cutting tool (4) is removed under the action of a source of suction (12). Heat is supplied to the tissue, prior to, or simultaneously with, the cutting thereof, such that the tissue being cut by the cutting tool (4) is coagulated tissue. In one embodiment, there is a third tube (16), and saline is fed to the apertures (18) via a channel (19) between the tubes (15) and (16). The outer tube (16) constitutes an active electrode, and the inner tube (14) constitutes the return electrode of an electrosurgical device. A radio frequency signal, supplied to the electrosurgical device, causes tissue to be coagulated prior to being cut by the cutting tool (4), resulting in smaller pieces of cut tissue which are easier to remove through the lumen (21).

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