Radiofrequency medical instrument and methods for vessel welding
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United States of America Patent
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-
Oct 3, 2000
Grant Date -
N/A
app pub date -
Feb 17, 1999
filing date -
Feb 19, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods and apparatus are provided for welding or sealing vessels or organs by collapsing a vessel with a jaw-like structure, applying an RF current between first and second bi-polar electrodes, and directing path of the RF current using a channeling electrode disposed intermediate the first and second bi-polar electrodes. The jaw-structure may be configured to progressively collapse the section of tissue to may squeeze fluids out of the lumen of the vessel. In addition, the jaw-structure may be configured to elongated the collapsed section of vessel to alter its impedance characteristics prior to application of RF energy. The device also may include one or more sensors providing signals to a power controller that modulates application of RF energy to the vessel.
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