| 摘要 |
Provided is a non-coring needle for venous access implantatable port. In one embodiment the non-coring needle comprises a puncturing assembly comprising two wings having a central sleeve, an L-shaped needle coupled to the sleeve, the needle including an annular groove or enlargement on its bent portion, and a plastic tubing coupled to the sleeve; and a syringe barrel comprising an internal chamber having a forward opening, and an elongate slot formed on the syringe barrel and being in communication with the chamber. The groove or enlargement is located at a first dent of the slot when the needle is concealed in the chamber in a non-use position, the groove or enlargement is located at a forward second dent of the slot when the needle is fully extended from the opening for use, and the groove or enlargement is permanently locked at a rear triangular recess of the slot when the needle is fully retracted into the chamber.
|
