| 摘要 |
A syringe includes a hollow barrel including a proximal end with an openi ng and a distal end configured to receive a syringe needle, where a portion between the proximal and distal ends of the barrel defines a fluid cavity to receive and expel fluid from the barrel distal end, a plunger extending int o the proximal end opening of the barrel and axially movable within the barr el toward and away from the barrel distal end, where the plunger includes a proximal end and a distal end that extends within the barrel and is movable toward and away from the barrel distal end to facilitate drawing fluid into and forcing fluid from the fluid cavity within the barrel. The plunger furth er includes a thumb pad with a flange that extends transversely from a longi tudinal orientation of the plunger and includes a dimension that is greater than the proximal end opening of the barrel, and at least a portion of the f lange is resiliently flexible and bendable to permit insertion of the flange within the plunger so as to lock the plunger within the barrel after a sing le use of the syringe.
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