| 摘要 |
A shielded safety syringe (1) comprising a cylindrical outer protective sleeve (2), a cylindrical inner needle carrier (18) movable axially through the outer sleeve, and a double-ended hypodermic needle (8) retained at a distal end of the needle carrier and movable with the carrier through the sleeve. A movement of the inner needle carrier through the outer protective sleeve correspondingly causes the needle to be relocated from an axially extended position (FIG. 4), at which to make a veni puncture through a patient's tissue, to a retracted position (FIG. 5), at which the needle is completely surrounded and shielded by the outer sleeve to permit a safe handling and disposal of the syringe. When the needle is located in the retracted position, a portion of the needle carrier (30) may be rotated and the needle thereby canted toward the outer sleeve to prevent both access to the needle and the return of the needle to the axially extended position, whereby to avoid an accidental needle strike and the spread of a contagious and, possibly life threatening, disease. |
