Patent ID: 7963961

Claim:
An apparatus for use in treating a hollow anatomical structure (HAS), the apparatus comprising: an elongate member having a distal section and a proximal section, the elongate member being sized for insertion into a HAS; a heating element located on the elongate member and having a first length; wherein the heating element has a distal section and a proximal section and is configured to apply energy along a length of the HAS in consecutive treatment segments of the HAS; a plurality of index markings marked on the elongate member; wherein the index markings are configured to be movably indexed in a distal to proximal direction via movement of the elongate member in the distal to proximal direction to sequentially position the heating element axially along the length of the HAS; at least one final marking distinct from the index markings and marked on the elongate member that indicates a final distance from said final marking to the proximal section of the heating element; and a warning section marked on the elongate member, the warning section comprising a distinct marking different from the plurality of index markings and the at least one final marking; wherein consecutive index markings are spaced apart by a second length, the second length being less than the first length to ensure overlap of consecutive treated segments of the HAS when the heating element is moved in the distal to proximal direction along the HAS.