Patent ID: 8366738

Claim:
A method of treatment of a body lumen, comprising: positioning a catheter inside a body lumen proximate to a region of the body lumen to be treated; positioning a longitudinal member inside the catheter, the longitudinal member including a plurality of longitudinally connected first shape coil elements and a plurality of longitudinally connected second shape coil elements and having a first flexion point disposed along a length of the longitudinal member, the plurality of first shape coil elements being longitudinally connected with the plurality of second shape coil elements, the plurality of first shape coil elements forming a plurality of first shape coil segments, the plurality of second shape coil elements forming a plurality of second shape coil segments, said plurality of first shape coil segments and said plurality of second shape coil segments being alternatingly longitudinally connected together, and the plurality of first shape coil elements and plurality of second shape coil elements having dissimilar cross sectional configurations, and a tether having a distal end portion attached with the longitudinal member, a proximal end portion disposed proximally to a proximal end of the longitudinal member and having a free end adapted to remain outside of a blood vessel for application of a substantially longitudinal proximally directed force on the tether by a clinician, and an intermediate length portion therebetween extending longitudinally inside a lumen of the plurality of first shape coil elements and outside an inner lumen of the plurality of second shape coil elements, wherein a first angle of greater than zero degrees is formed at the first flexion point when the substantially longitudinal proximally directed force is applied to the tether free end; maintaining the free end of the proximal end portion of the tether outside of a proximal end of the catheter throughout the treatment; delivering a portion of the longitudinal member distal to a distal end of the catheter; transforming the portion of the longitudinal member from a generally linear configuration to a secondary generally three dimensional configuration by applying a proximally directed force on the proximal end portion of the tether; and sliding the longitudinal member proximally within the body lumen.