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Feucht et al. . Abraham et al. . Carrier et al. . Subrmaniam et al.
FOREIGN PATENT DOCUMENTS
1480736 7/1977 United Kingdom .
Wald et al, "Accidental Burns Associated With Electrocautery", JAMA, Aug. 16, 1971, vol. 217, No. 7, 916-921.
Primary Examiner—Lee Cohen
Attorney, Agent, or Firm—-Workman, Nydegger & Seeley
A reusable electrosurgical return electrode pad for use with electrosurgery. In one embodiment it includes a presentation or working surface area lying in the range ol from about 11 to about 1,500 square inches. In another the working surface is at least as large as that ol a projection ol about hall ol the profile ol the trunk ol a patient. In yet another, it includes a working surface area at least as large as that ol a projection ol the profile ol both the trunk and legs ol a patient. It is adapted for disposition on the working surface ol an operating table or dentist's chair immediately underlying a patient during electrosurgery. By presenting a very large surface area, the need for direct contact or contact through conducting jells is eliminated; through employment ol washable surface areas, it is made readily cleanable and reusable; and through the inclusion ol capacitive coupling and selection ol impedance characteristics lor the materials and geometries, it is made sell-limiting as to current density and temperature rise so as to prevent patient trauma. An optional sleeve is provided for cooperative use with the electrode.
12 Claims, 6 Drawing Sheets