Multiple sample needle assembly

摘要: A multiple sample needle assembly (10) for determining fluid access when collecting samples from a source of into vacuum collection devide (16). The includes housing (12) with chamber (50) therein having first and second openings (30, 42) in communication the (50). is preferably translucent to provide viewing contents cannula (14) associated opening (30), while (42) adapted device (10). An operable, resilient valve member (26) positioned normally closed against gas permeable, liquid impermeable plug (27) mounted (26). open away pressure at less than (30). When makes entry source, enters by forcing any through porous (22) being viewable user. This remains until opens under differential.