| 摘要 |
A catheter that allows to introduce contrast material fluid into the blood vessel for visualizing vascular anatomy and shape without the need to retract a guide wire is disclosed. In the first embodiment of this invention, a single lumen is used for both guide wire insertion and as a path for contrast material fluid introduced through a conduit tube which is in fluid communication with the lumen. In the second embodiment of this invention, a first lumen is used for guide wire insertion, whereas a second lumen is used as a path for contrast material fluid introduced through a conduit tube which is in fluid communication with the second lumen. In both these embodiments, contrast material fluid can be introduced into the blood vessel without the need to retract the guide wire.
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