| 摘要 |
An infusion catheter is provided having a main body including a continuous generally round cross-section about a longitudinal axis. The body has proximal and distal ends. A tip section has a round cross-section and is smaller in cross-section then the main body and ends in a tip. The tip section is attached to the distal end of the main body at a transition portion which tapers smoothly from the main body to the tip section. The main body and tip section define a primary lumen extending from the proximal end of the body to the tip and, the lumen is continuous and without misalignment where the main body meets the tip section. This lumen has a longitudinal axis offset from that of the main body and the main body further includes a pair of side-by-side secondary lumens terminating at respective side openings in the main body. A first of these openings is adjacent the transition portion and the second is spaced from the transition portion. Plug material is provided in the main body between said second opening and the transition portion. The catheter can have more than two secondary lumens. The catheter is made using a process to align the body and tip section while heat and pressure cause the formation of the transition portion.
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