Electrosurgical instrument
First Claim
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1. A bi-polar electrosurgical instrument with first and second energy-delivery surface elements coupled in series to an RF source, the first surface element overlying and electrically coupled to a first PTC body, wherein the first surface element and the first PTC body are coupled in parallel to the RF source.
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Accused Products
Abstract
An embodiment of the invention includes an electrosurgical jaw structure that carries cooperating PTC bodies in both series and parallel circuit components for controlled RF energy application to engaged tissue to effectively weld tissue.
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Citations
22 Claims
- 1. A bi-polar electrosurgical instrument with first and second energy-delivery surface elements coupled in series to an RF source, the first surface element overlying and electrically coupled to a first PTC body, wherein the first surface element and the first PTC body are coupled in parallel to the RF source.
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21. An electrosurgical instrument for applying energy to a body structure, the instrument comprising first and second jaws defining first and second energy-application surfaces, the first surface comprising a first polarity electrode portion and an electrically coupled PTC portion within a first circuit portion connected to an RF source, the second surface comprising a second polarity electrode and an electrically coupled PTC portion within a second circuit portion connected to the RF source, wherein the first and second circuit portions are configured as parallel and series circuits respectively.
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22. A bi-polar electrosurgical instrument comprising:
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an RF source; and first and second energy-delivery means coupled in series to the RF source, the first energy-delivery means overlying and electrically coupled to a first PTC component means, wherein the first energy-delivery means and the first PTC component means are coupled in parallel to the RF source.
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Specification