| 摘要 |
A catheter apparatus (42) includes an arterial catheter (46) and venous catheter (44) insertable into an artery (30) and an adjacent vein (36), respectively, to a position for crating a fistula (54). The venous catheter (44) includes an expandable structure (48) to expand a portion of the vein (36) adjacent the venous fistula site (54) towards contact with the wall (32 ) of the artery. The expandable structure (48) of the venous catheter (44) may include one or more balloons (48), a wire basket (120), or the vein (36) can be expanded by injecting a fluid through an injection port (128) into an isolated area (130) of the vein (36). The apparatus (42) includes a tool (78 ) for crating an opening (80, 82) through the wall (32) of the artery (30) adjacent the arterial fistula site (54), which may include a needle (78) switchable between an inactive and active configuration. The fistula (54) ma y be completed with the aid of a stent (100), and the proximal portion of the vein (36) blocked with an embolization device (114).
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