Patent ID: 8382771

Claim:
A medical device comprising: an elongate sleeve defining a lumen extending longitudinally within at least a portion of the elongate sleeve, the sleeve comprising a first portion and a second portion more rigid than the first portion, wherein the sleeve is a unitary one-piece structure; and an elongate core slidably disposable within the lumen, the core including a section that changes shape when disposed in the first portion to increase an outer diameter of the sleeve, the section being retained in a substantially linear configuration when disposed in the second portion, wherein, when the section changes shape, the first portion of the sleeve is configured to transition from an unexpanded state to an expanded state, wherein in the unexpanded state, the first portion has a first outer diameter that is equal to an outer diameter of the second portion of the sleeve, and wherein in the expanded state, the first portion has a second outer diameter that is greater than the first outer diameter.