| 摘要 |
PROBLEM TO BE SOLVED: To create a positive displacement of fluid out of a syringe (and therefore into any attached catheter, for example) after a stopper has been bottomed in a syringe barrel and force is released from a plunger rod so as to effectively and consistently reduce and/or eliminate reflux of fluid back into the syringe upon the release of pressure on the plunger rod.SOLUTION: A stopper (12) adapted for attachment with a plunger rod (14) for use within a syringe barrel (16) is disclosed. The stopper includes a main body (26) defining an open rearward end (28) and a closed front end (30). The open rearward end is adapted to receive a front forward end attachment portion (31) of the plunger rod. The stopper also includes a core member (32) integrally formed with the main body adjacently to the closed front end. The core member includes a nose portion (34) having a profile adapted to create a positive seal with an outlet opening of this syringe barrel. |
