Coaptive tissue fusion method and apparatus with current derivative precursive energy termination control
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United States of America Patent
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Jul 5, 2011
Grant Date -
Apr 16, 2009
app pub date -
Oct 16, 2007
filing date -
Oct 16, 2007
priority date (Note) -
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Abstract
Biological tissue is sealed or fused to occlude an opening by compressing apposite sidewall portions of the tissue and applying sufficient energy to cause the fibers of the compressed apposed sidewall portions to intertwine and fuse with one another to form a permanent seal. The energy application is controlled by detecting a precursor fusion condition while applying the energy and before sufficient energy has been applied to achieve a permanent seal. The application of energy is terminated in a time-delayed relationship to the detection of the precursor fusion condition. The precursor fusion condition is detected from derivative values of an envelope established by peak values of cycles of high-frequency current conducted through the tissue.
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