US Patent 10485956 Guide extension catheter with grooved push member segment

A guide extension catheter includes a push member and a distal shaft. The push member includes a segment having a first surface and a second surface opposite the first surface. The segment includes a groove in the first surface. The second surface is substantially flat. The distal shaft is coupled to the push member and includes a passageway. The segment of the push member including the groove is adjacent to the distal shaft.