| 摘要 |
The invention is directed to a retractable needle system for use with a medical device, having a substantially cylindrical barrel comprising: a needle support means (1) for mounting a needle at the front end of said cylindrical barrel (3) which comprises a well (12) having a bottom and sides and an exterior surface and an interior surface (14), said exterior surface (13) being conformed so as to reversibly seal said needle support means to the front end of said cylindrical barrel (3), and a retractor (2) which comprises a shank portion, said retractor (2) having a front end (20) which is configured so as to irreversibly engage the interior surface (14) of the well (12) of said needle support means (1) when advanced to the front end of said cylindrical barrel (3), and to thereby retract said needle support means (1) into said cylindrical barrel (3) when the retractor (2) is withdrawn toward the back end of the cylindrical barrel (3). |
