| 摘要 |
A winged needle assembly including a cannula 1, a hub 2, a tube 3 and a cylindrical holder 4 provided with wings at the distal end thereof and retaining the hub therein. The hub 2 is slidable along the inner wall of the cylindrical holder 4 from a first position near the distal end of the cylindrical holder 4 up to a second position near the proximal end thereof. Further, between the hub 2 and the cylindrical holder 4, there are provided a first locking arrangement (21,41) for releasably locking the hub 2 at the first position of the cylindrical holder 4 and a second locking arrangement (22,42,23,43) for substantially unreleasably locking the hub 2 at the second position of the cylindrical holder 4. With the above structure, the edge of the needle can be smoothly retracted and protected within the cylindrical holder without any sense of frictional resistance to medical personnel using the needle while the wings are kept fixed to the skin of a patient.
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