| 摘要 |
Safety needle assemblies (100, 400, 500, 600, 700) that include a needle (140, 440) having a sharp distal tip (145, 445) and a needle tip cover mounted on the needle (140, 440) are disclosed. The needle tip cover includes a proximal wall having an opening for the needle (140, 440) to pass therethrough. The needle tip cover urges against the needle (140, 440) in a ready to use position and shields the sharp distal tip (145, 445) in the secured position. The needle tip cover is moved proximally by a biasing member (180, 480) after the needle (140, 440) has been inserted into a patient a predetermined depth. |
