Cannula retractable medical collection device

摘要

A cannula retractable medical collection device includes a cannula mount (3) inserted into and axially slidable relative to a rear larger-diameter wall portion (229) of a barrel (2), a double-ended needle cannula (41) including a rear needle segment (411) extending into an accommodation chamber (31) in the cannula mount (3) for pricking a stopper (51) of a collection vial (5), and a front needle segment (413) secured to the cannula mount (3) by a needle hub (40). The front needle segment (413) extends outwardly of the barrel (2) in a position of use, and retreats inwardly and rearwardly of the barrel (2) in a disposal position when the cannula mount (3) is in the front and rear positions, respectively. A releasably retaining member includes a retaining hole (231) formed in the larger-diameter wall portion (229), and a radially extending engaging peg (33,632) engageable in the hole (231). An actuator (34,6) is operable to disengage the peg (33,632) from the hole (231) so as to permit axial movement of the cannula mount (3).