Methods and apparatus for measuring valve annuluses during...

A - Human Necessities – 61 – F

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A61F 2/24 (2006.01) A61B 5/107 (2006.01)

Patent

CA 2381820

A sizer measures a valve annulus to determine a size of an artificial heart valve to be sewn in the valve annulus during heart-valve replacement surgery. The sizer includes a support member and a resilient member. The support member has a size corresponding to the size of one of a plurality of artificial heart valves. The resilient member is disposed about the support member and has a resiliency substantially equal to the resiliency of a sewing ring of the artificial heart valve. Accordingly, when a surgeon inserts the sizer into a valve annulus, the resilient member conforms to the shape of the valve annulus much like the sewing ring will conform when positioned in the annulus and sewn in place. The surgeon is therefore able to determine more accurately the size of the annulus and, thereafter, to select a properly sized artificial valve.

La présente invention concerne une calibreuse qui mesure l'annulus valvulaire de façon à déterminer le calibre d'une valvule artificielle à suturer dans l'annulus valvulaire en chirurgie de remplacement valvulaire. La calibreuse est constituée d'un élément support et d'un élément résilient. La taille de l'élément support correspond la taille de l'une des différentes valvules artificielles. L'élément résilient, qui est vient autour de l'élément support, présente une résilience sensiblement égale à celle de la bague de suture de la valvule artificielle. Ainsi, lorsque le chirurgien insère la calibreuse dans l'annulus valvulaire, l'élément résilient épouse la forme de l'annulus valvulaire, de la même façon que la bague de suture le fera lorsqu'elle sera mise en place et suturée dans l'annulus. Cela permet au chirurgien de déterminer avec encore plus de précision la taille de l'annulus, et, à la suite, de choisir la valvule artificielle de la taille voulue.

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