Patent ID: 8177830

Claim:
A catheter assembly, comprising: a catheter shaft; a balloon positioned on the catheter shaft, where the balloon has a first balloon waist; a first lead extending longitudinally through the catheter shaft; a first fixed body affixed to the catheter shaft, where the first fixed body prevents the balloon from moving longitudinally with respect to the catheter shaft, and where the first fixed body is a conductive material and is coupled to the first lead; and a first sealing member adjacent the first balloon waist, where the first sealing member includes a metal that expands in response to a temperature change and the first lead provides electrical current via the first fixed body to reversibly transition the first sealing member from a nonactivated state to an activated state in response to the temperature change in the first sealing member, and where at least a portion of the balloon rotates relative the catheter shaft in the nonactivated state and the first sealing member engages the catheter shaft to form a fluid tight seal and to prevent rotation of the balloon relative the catheter shaft in the activated state.