| 摘要 |
A flexible catheter for delivering drugs, fluids or occlusive devices to a desired location in a bodily cavity or passageway. The catheter includes inner (20) and outer tubular layers, and has a continuous helical wire coil (14) disposed between the tubular layers along substantially the entire usable length of the catheter. In a first section, the wire coil (14) has a first pitch, and in a second section the wire coil has a second pitch which is larger than the first pitch. The larger pitch in the second portion of the coil provides the second section of the catheter with greater flexibility than the first section.
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