Patent ID: 6923788

Claim:
A catheter for insertion into a body lumen over a guidewire, comprising: a catheter shaft having a proximal end and a distal end and an interior surface and an exterior surface, said interior surface defining a non-circular guidewire lumen, said non-circular guidewire lumen defined by a plurality of alternating arms and nodes; said catheter shaft comprises a first material and a crown portion comprises a second material that is different from said first material; a cut extending between said interior surface and said exterior surface of said catheter shaft, said cut being disposed at an apex of one of said guidewire lumen arms, said apex positioned where a distance between said interior surface and said exterior surface of said catheter shaft is at a minimum; and a guide member, wherein said guide member opens and closes said cut such that when the catheter is tracked of a guidewire, the guidewire is removable from said guidewire lumen of said catheter shaft via said guide member.