| 摘要 |
A rapid exchange catheter is disclosed having a single lumen proximal shaft portion with a helical coil or helically cut hypotube component extending within a lumen thereof. The helical coil or helically cut hypotube component provides stiffness and pushability to the catheter. A proximal end of helical coil or helically cut hypotube component is attached within a luer fitting at a proximal end of the proximal shaft portion, such that the helical coil or helically cut hypotube component extends within the proximal shaft lumen in a somewhat cantilevered arrangement unsupported and unattached at any point along its length with the proximal shaft portion. As such, the helical coil or helically cut hypotube component moves independent of the proximal shaft portion to adjust to the twists and turns of the vasculature independent of the proximal shaft portion.
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