摘要 |
A balloon catheter device (300) of the present invention includes an elongate catheter shaft (301) comprising a helically-cut hypotube having a proximal portion and a distal portion. The proximal portion includes a coating that allows the shaft to provide a patent fluid passage, and a part of the distal portion inside a balloon (304) may be uncoated or otherwise open to the balloon lumen, allowing for passage of fluid through the shaft into the balloon lumen. |