The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 1992
Filed:
Mar. 21, 1990
Erbe Elektromedizin GmbH, Tubingen, DE;
Abstract
At least one neutral electrodes insulated from each other is separately connected to the current return terminal of a high frequency electro-surgical equipment are applied in electrical contact with the skin of a patient while surgery is performed with the active electrode of the equipment. A low frequency alternating current is passed through the patient's flesh from one neutral electrode to the other to monitor the quality of contact between the neutral electrodes and the patient. The intensity of the intermeittent high frequency current or a corresponding setting of the high frequency surgery equipment is compared with a signal representative of the monitoring current so that warning signals and/or automatic shut-off of the high frequency equipment will occur when and only when the high frequency current for surgical cutting or coagulation is greater than that which is permissible for the electrical transition conductivity present at the time between the respective neutral electrodes and the skin of the patient without risk of thermal damage to the skin at the place the neutral electrode is applied.