| 摘要 |
<p>A shielded safety syringe (1) comprising a cylindrical, outer protective sleeve (2), an inner needle carrier (14) movable axially through the sleeve, and a double-ended hypodermic needle (8) supported by the needle carrier and aligned coaxially with the outer sleeve and needle carrier. The needle communicates with an evacuated blood collection tube (40) at the interior of the outer sleeve. A position control button (20) is connected to the needle carrier and slidable through an axial guide channel (9) formed in the outer sleeve for moving the needle carrier between proximal and distal positions within the sleeve. Accordingly, the needle is also moved through the outer sleeve to be relocated from an axially extended position, at which to make a veni puncture (44) through a targeted tissue area, to a retracted position, at which the needle is completely surrounded and shielded by the outer sleeve to permit a safe handling and disposal of the syringe while avoiding an accidental needle strike.</p> |
