Patent ID: 7927362

Claim:
A catheter assembly comprising: a catheter, the catheter having a proximal portion and a distal portion; a medical balloon coaxially mounted on the distal portion of the catheter, the medical balloon comprising a proximal waist, a proximal cone, a distal waist, a distal cone and a body portion, wherein the body portion is positioned between the proximal and distal cones, the balloon having a reduced diameter state and an expanded diameter state; a sheath, the sheath being tubular and being coaxially mounted about at least a portion of the body portion of the medical balloon, wherein the sheath comprises a tubular body and is elastic, such that it stretches with the medical balloon as the balloon is expanded from its reduced diameter state to its expanded diameter state, the sheath having an inner surface and an outer surface and comprising a plurality of ribs radially extending from the outer surface, each rib extending in a circumferential direction completely around the sheath; and a medical device mounted about the sheath, the medical device having a reduced diameter configuration and an expanded diameter configuration.