Patent ID: 7037290

Claim:
An elongated multi-lumen steerable catheter comprising: a catheter body extending between a catheter body proximal end and a catheter body distal end and having a proximal segment, a bendable intermediate segment and a distal segment, the catheter body further comprising: an outer sheath extending between the catheter body proximal end and the catheter body distal end; a deflection lumen extending within the outer sheath from a deflection lumen proximal end opening to the catheter body distal end; and a delivery lumen extending within the outer sheath between a delivery lumen proximal end opening and a delivery lumen distal end opening at the catheter body distal end, the delivery lumen defined by a delivery lumen liner formed of an elastomer extending through the proximal segment, the bendable intermediate segment, and the distal segment of the catheter body; a hub mounted to the catheter body proximal end; and a deflection mechanism introduced within the deflection lumen selectively operable at the hub inducing a bend in the intermediate segment, wherein the outer sheath comprises a proximal outer sheath segment formed of a first thermoplastic material having a first flexural modulus extending the length of the catheter body proximal segment, an intermediate sheath segment formed of a second thermoplastic material having a second flexural modulus extending the length of the catheter body intermediate segment, and a distal sheath formed of a third thermoplastic material having a third flexural modulus lower than the first flexural modulus and second flexural modulus, the distal sheath extending the length of the catheter body distal segment.