Rotatable catheter assembly

摘要

A catheter assembly comprises a catheter shaft, a balloon and a pair of collars engaged to the catheter shaft. Each collar has a body portion and at least one lip portion extending radially outward from the body portion. Each collar has a nonactivated state and an activated state, wherein in the nonactivated state the balloon is rotatable about the collars and each lip portion is constructed and arranged to abut a portion of the balloon to prevent the balloon from moving longitudinally relative thereto. In the activated state the body portion of each collar is sealingly engaged to at least a portion of the balloon.