1step: U.S. patent # 7,025,764 (viz., Bonding of soft biological tissues by passing high frequency electric current therethrough--assigned to Live Tissue Connect, Inc., a subsidiary of CTUM) posits nine claims, which appear to cover the bases, no matter the tissue or organ involved.
The design of the electrical forceps and necessary clamps (q.v.) peculiar to the surgical application is, of course, crucial to success. This is where Ventrex, Inc., CTUM's medical device contract manufacturer, comes into play. If there is additional patent application protection coming out of this collaboration, they might or might not encompass design patents, a separate US. patent category.
(In any case, yours is a good question for CSMG's Frank D'Amelio, recognized patent authority in the medical device arena.)
U.S. patent # 7,025,764 (assigned to Live Tissue Connect, Inc., a subsidiary of CSMG Technologies [CTUM]) Patent Abstract http://tinyurl.com/yqzakp
Technique for bonding soft biological tissue having an incision therein with forceps adapted to grip a portion of tissue on both sides of incision. Electrodes are secured to forceps for contracting the tissue portion. An electrical power source provides a high frequency electrical signal to electrodes to be passed through the tissue portion. The electrical power source is controlled to provide electrodes with one voltage signal during a first of two stages, wherein the voltage rises linearly, and another voltage signal during a second of the two stages, wherein the voltage is stabilized and modulated with a low frequency rectangular signal. A clamping means applies force with the forceps to compress the tissue at one or different levels during two time periods while the high frequency voltage is passed through the electrodes. The tissue impedance is measured as a function of time, with its minimal value being determined and stored.
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