Steerable guiding sheath with ring electrodes and related method of construction

A method of constructing a shaft of a guiding sheath, comprising:

• providing an inner liner;
• positioning a lumened lead wire tubing longitudinally alongside an outer surface of the inner liner;
• positioning a lumened puller wire tubing in contact with the outer surface of the inner liner;
• forming a braided member with fibers, wherein for a first portion of the shaft, braiding the fibers over the outer surface of the inner liner, the lumened puller wire tubing, and a first portion of the lumened lead wire tubing, and wherein for a second portion of the shaft, braiding the fibers over the outer surface of the inner liner and the lumened puller wire tubing but under a second portion of the lumened lead wire tubing such that the first portion of the lumened lead wire tubing extends beneath the braided member, the second portion of the lumened lead wire tubing extends over the braided member, and the lumened puller wire tubing extends beneath the braided member along an entire length of the shaft;
• applying an outer layer over the inner liner, the braided fibers, the lumened lead wire tubing, and the lumened puller wire tubing;
• extending a lead wire through the lumened lead wire tubing;
• extending a puller wire through the lumened puller wire tubing;
• mounting a ring electrode on the outer layer;
• and
• connecting a distal end of the lead wire to the ring electrode.