A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 17/00 (2006.01) A61M 25/04 (2006.01) A61B 17/02 (2006.01) A61B 17/30 (2006.01) A61B 17/34 (2006.01) A61B 19/00 (2006.01)
Patent
CA 2197608
The invention is devices and techniques which use a negative (suction) pressure or vacuum, applied through a surgical instrument, to fix the position of a portion of the surface of a beating heart so that a surgical procedure can be more easily performed. The devices apply a negative pressure at several points on the outer surface of the heart such that a portion of the heart is fixed in place by the suction imposed through the surgical instrument. Because the instrument fixes the position of the tissue, and because the instruments remain at a constant distance from the particular portion of the heart where the surgery is being performed, the device may also serve as a support or platform so that other surgical instruments or devices can be advantageously used at the site. In certain preferred embodiments, the devices described herein have structures to facilitate the use of additional surgical instruments such that the placement of negative pressure device permit the surgeon to advantageously manipulate the other instruments during surgery. The negative pressure is preferably imposed through a plurality of ports which may be disposed in a substantially planar surface of the instrument which contacts the cardiac tissue.
L'invention a trait à des instruments et à des techniques utilisant une pression d'aspiration (succion) ou un vide obtenus au moyen d'un instrument chirurgical, pour maintenir en place une partie de la surface d'un coeur qui bat, de manière à faciliter la réalisation d'une intervention chirurgicale. Les instruments appliquent une pression d'aspiration à plusieurs points du coeur, de sorte qu'une partie du coeur est maintenue en place par la succion appliquée au moyen de l'instrument chirurgical. Parce que l'instrument maintient en place le tissu et que les instruments demeurent toujours à la même distance de la partie du coeur faisant l'objet de l'intervention chirurgicale, l'instrument peut également servir de support ou de plate-forme pour faciliter l'utilisation d'autres instruments au site. Dans certaines applications, les instruments décrits sont structurés de manière à faciliter l'utilisation d'instruments chirurgicaux supplémentaires de sorte que l'emplacement du dispositif de succion permet au chirurgien de manipuler facilement d'autres instruments pendant l'intervention chirurgicale. La pression d'aspiration est préférablement appliquée par plusieurs éléments pouvant se trouver sur une surface presque plane de l'instrument qui est en contact avec les tissus cardiaques.
Benetti Federico J.
Matheny Robert G.
Taylor Charles S.
Cardiothoracic Systems Inc.
Mccarthy Tetrault Llp
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