Pleated deployment sheath

Details Pleated deployment sheath Pleated deployment sheath

A - Human Necessities

61

F

A61F 2/84 (2006.01)

Patent

CA 2711507

A deployment sheath (20) for medical devices (38) is provided that includes one or more pleats (34) in its pre-deployment state that are allowed to open during deployment so as to facilitate easier device deployment and sheath removal. Preferably, the sheath is removed by everting it over itself during the delivery process. By orienting the pleats along the length of the sheath, preferably helically around the sheath, the sheath undergoes a predictable enlargement during deployment so as to relieve friction of the everted sheath sliding along itself during deployment. This allows the sheath to be removed with less tension than previous everting sheath constructions and assures more accurate device placement in a patient.

L'invention concerne un fourreau expansible (20) pour dispositifs médicaux (38), qui comprend dans son état pré-expansé un ou plusieurs placages (34) qui peuvent s'ouvrir pendant l'expansion de manière à faciliter l'expansion du dispositif et l'enlèvement du fourreau. Le fourreau est de préférence enlevé en le rabattant sur lui-même pendant l'opération de pose. Grâce à l'orientation des placages suivant la longueur du fourreau, de préférence en hélice autour du fourreau, le fourreau subit un agrandissement prévisible pendant son expansion de manière à diminuer le frottement du fourreau retourné qui coulisse sur lui-même pendant l'expansion. Cela permet d'enlever le fourreau avec moins de traction qu'avec les structures de fourreau rabattables antérieures et garantit un placement plus précis du dispositif dans l'organisme du patient.

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