Endovascular system for arresting the heart

A - Human Necessities – 61 – M

Patent

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Details

A61M 37/00 (2006.01) A61F 2/24 (2006.01) A61M 1/36 (2006.01) A61M 25/00 (2006.01) A61M 25/06 (2006.01) A61M 25/10 (2006.01) A61M 25/01 (2006.01) A61M 29/02 (2006.01)

Patent

CA 2171097

The invention provides an endovascular device (20) for parti- tioning the ascending aorta and a system for arresting the heart to facilitate the performance of precedures such as heart valve replace- ment or coronary artery bypass grafting without the need for a thora- cotomy. According to the invention, an endovascular device (20) for partitioning a patient's ascending aorta comprises a flexible shaft (22) having a distal end (24), a proximal end (26), and a first inner lumen (29) therebetween with an opening (31) at the distal end (24). The shaft (22) may have a preshaped distal portion (32) with a curvature generally corresponding to the curvature of the patient's aortic arch Expandable means (28) are disposed near the distal end (24) of the shaft (22) proximal to the opening (31) in the first inner lumen (29) for occluding the ascending aorta so as to block substantially all blood flow therethrough for a plurality of cardiac cycles. Means (90) for de- livering cardioplegic fluid may be connected to the proximal end (26) of the device to infuse cardioplegic fluid into the coronary arteries for arresting the heart. The endovascular device of the invention is read- ily positionable in the ascending aorta, resists displacement caused by systolic blood flow, and maintains axial alignment with the center of the ascending aorta and aortic valve.

Dispositif endovasculaire (20) servant à obturer l'aorte ascendante et système servant à arrêter le coeur pour permettre des opérations telles que le remplacement des valvules cardiaques ou la greffe de pontages coronariens sans avoir à recourir à la thoracotomie. Ledit dispositif (20) comporte un tube souple (22) présentant une extrémité distale (24) et une extrémité proximale (26) et une première lumière intérieure (29) les reliant et s'ouvrant sur l'extrémité distale (24). Le tube (22) peut comporter une partie préformée dont la courbure correspond sensiblement à celle de l'arc aortique du patient. Des moyens dilatables (28) disposés à proximité de l'extrémité distale (24) du tube près de l'ouverture pratiquée dans la première lumière (29) servent à obturer l'aorte ascendante et à bloquer presque totalement toute circulation de sang pendant une suite de cycles cardiaques. Des moyens (90) de distribution d'un fluide cardioplégique en vue de son injection dans les artères coronaires afin de provoquer l'arrêt du coeur peuvent être raccordés à l'extrémité proximale (26) du dispositif. Ce dispositif endovasculaire, facile à mettre en place dans l'aorte ascendante, s'oppose aux déplacements dus au flux de sang systolique et reste centré sur l'axe de l'aorte ascendante et de la valvule sigmoïde.

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