Single sample needle with vein entry indicator

摘要: A needle assembly (10) suitable for single sample blood collection and determining vein entry when collecting a from patient into vacuum device includes housing (12) with an interior chamber (40) inlet (14) on one side of the outlet (15) other. The extends interiorly (40), is closed at end pair holes (48, 49) each spaced preferably along axial line. slidable plug (26) operatively positioned in to prevent liquid flowing while allowing gas flow (49) first position whereby prevented may be viewed by user through transparent portion (12). operative movable second allow that ofthe collected assembly.