System and method for control of tissue welding

Details System and method for control of tissue welding System and method for control of tissue welding

A - Human Necessities

61

B

A61B 18/18 (2006.01) A61B 18/12 (2006.01) A61B 18/14 (2006.01)

Patent

CA 2476615

A system and method for welding of biological tissue by applying an RF voltage during a first stage to electrodes (310) of a tissue welding tool (300); monitoring tissue impedance, and determining a minimum tissue impedance value during the first stage; determining relative tissue impedance; detecting when the relative tissue impedance reaches a predetermined relative tissue impedance value and starting a second stage; calculating the duration of the second stage as a function of the duration of the first stage; and applying the RF voltage during the second stage to the electrodes (310) of the tissue welding tool (300).

L'invention concerne un système et un procédé permettant de souder un tissu biologique. Ce procédé consiste à appliquer une tension RF durant une première étape à des électrodes d'un appareil de soudage de tissu, à surveiller l'impédance de tissu et à déterminer une valeur d'impédance de tissu minimale durant cette première étape, à déterminer l'impédance de tissu relative, à détecter le moment où l'impédance de tissu relative atteint une valeur d'impédance de tissu relative prédéterminée et à initier une seconde étape, à calculer la durée de cette seconde étape en fonction de la durée de la première étape, et à appliquer la tension RF durant la seconde étape aux électrodes de l'appareil de soudage de tissu.

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