Resources Contact Us Home
Surgical system

Image Number 9 for United States Patent #7211084.

An electrosurgical cutting blade (1) comprises a first electrode (2), a second electrode (3), and an electrical insulator (4) separating the first and second electrodes. The first and second electrodes have dissimilar characteristics (cross-sectional area, thermal conductivity etc.) such that the first electrode (2) is encouraged to become an active electrode and the second electrode (3) is encouraged to become a return electrode. The spacing between the first and second electrodes (between 0.25 mm and 3.0 mm) and the peak voltage supplied to the electrodes (2 and 3) are both selected such that arcing does not occur directly between the electrodes, but between the first electrode and the tissue at the target site. The arrangement is such that, in use, a thermal differential of at least C. is established between the first and second electrodes (2 and 3), such that the second electrode is maintained below a temperature of C. This is achieved either by thermally insulating the second electrode from the first electrode, and/or by transferring heat away from the second electrode, e.g. by conduction, forced cooling, or by means of a heat pipe (27).

  Recently Added Patents
Systems and methods for automated institutional processing of payments
Apparatus and method for phase synchronization in radio frequency transmitters
Varying latency timers in a wireless communication system
Verification of computer-executable code generated from a model
Tomlinson Harashima precoding with additional receiver processing in a multi-user multiple-input multiple-output wireless transmission system
Semiconductor device having trapezoidal shaped trenches
Autobrake and decel control built-in test equipment
  Randomly Featured Patents
Method of stacking flat bags or sacks which are folded about at least two transverse fold lines
Structure of a test key for monitoring salicide residue
Filter exchange device for an extrusion molding machine
Epitaxial growth method
Semiconductor integrated circuit device and method of manufacturing same
Resin wristwatch band having first and second molded resin members
Fiber-optical sensor
Chemical biochemical and biological processing in thin films
Workstation shelf
Carbon monoxide gas detector