| 摘要 |
A double lumen introducing needle includes a hub having diametrically opposing mounting and distal ends connected by an at least substantially straight axial passageway. A side passageway branches from a junction between the ends and extends away from the junction and the distal end of the hub at an acute angle to the reminder of the axial passageway and terminates in a separate side port. A first, inner lumen extends continuously and unbrokenly from the side passageway through the junction along the axial passageway and projects outwardly from the distal end of the hub. The open end of the inner lumen in the side port is fluidly isolated by a seal from the axial passageway. An outer tube is mounted to the hub at the distal end. The outer tube projects outwardly from the distal end around the first lumen and defines at least part of a second, outer lumen surrounding the first, inner lumen. The outer lumen is fluidly coupled with a syringe at the mounting end of the hub through the axial passageway. The hub can be provided with a releasable coupling at the mounting end to releasably engage a conventional syringe, or at the distal end to releasably engage a conventional releasable needle, at both ends, or at neither end in the case of a disposable needle and syringe. The needle can be used to insert flexible wire members like guidewires or electrodes into blood vessels.
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