Importance

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Abstract

An infusion guidewire that can be used either as a guidewire or an infusion catheter having an integral, tapered core wire within an infusion lumen formed of the aligned lumens of the conduit of a proximal connector housing, a proximal inner sheath in a proximal guidewire portion and a distal coil wire in a distal guidewire portion. The core wire proximal end is attached to the connector housing, and the core wire distal end is connected to the distal end of the distal wire coil. An outer sheath is attached to the connector housing and formed over the proximal inner sheath and the distal wire coil. A plurality of infusion side holes are formed in a distal infusion segment of the outer sheath in fluid communication with the infusion lumen. At the junction of the proximal inner sheath and the distal wire coil, a radiopaque wire coil of a material having a higher radiopacity than the distal wire coil is formed into a plurality of radiopaque wire coil turns of substantially the same pitch, inner lumen diameter and outer diameter as the distal wire coil. The radiopaque wire coil turns are wound into spacings between adjacent turns of the proximal wire coil such that the wire coils and the inner coil lumens are substantially co-axially aligned and maintained in alignment by the inner and outer sheathes.

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First Claim