Tissue welding and cutting apparatus

A - Human Necessities – 61 – B

Patent

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Details

A61B 18/08 (2006.01) A61B 18/14 (2006.01)

Patent

CA 2602015

A surgical apparatus and methods for severing and welding tissue, in particular blood vessels, including an elongated shaft (36) having a pair of relatively movable jaws (40, 42) at a distal end thereof. A first heating element (46) on one of the jaws heats up to a first temperature and forms a welded region within the tissue, while a second heating element (48) on one of the jaws heats up to a second temperature and severs the tissue within the welded region. A control handle (38) includes controls for opening and closing the jaws, and may include an actuator for sending current through the first and second heating elements. The first and second heating elements may be electrically connected in series, and the first heating element may be bifurcated such that it conducts about one half of the current as the second heating element.

La présente invention concerne un appareil chirurgical et des procédés permettant de découper et de souder des tissus en particulier des vaisseaux sanguins, comprenant un axe allongé (36) possédant une paire de mâchoires relativement mobiles (40,42) à une extrémité distale de cet axe. Un premier élément chauffant (46) sur une des mâchoires réchauffe jusqu'à une première température et forme une région soudée dans les tissus, tandis qu'un second élément chauffant (48) sur une des mâchoires réchauffe jusqu'à une seconde température et coupe le tissu dans la région soudée. Une poignée de commande (38) comprend des commandes permettant d'ouvrir et de fermer les mâchoires et peut comprendre un dispositif de commande permettant d'envoyer du courant à travers le premier et le second élément chauffant. Le premier et de second élément chauffant peuvent être connectés électriquement en série et, le premier élément chauffant peut-être bifurqué de sorte qu'il conduise environ la moitié du courant du second élément chauffant.

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