公开(公告)号：EP2254472A2

公开(公告)日：2010-12-01

申请号：EP08731700.4

申请日：2008-03-07

申请人： Becton, Dickinson & Company

发明人： TAN, Chee Leong Alvin ,  MOH, Jon ,  SIM, Stanley

IPC分类号： A61B5/153

CPC分类号： A61B5/150488 ,  A61B5/15003 ,  A61B5/150213 ,  A61B5/150389 ,  A61B5/150496 ,  A61B5/150572 ,  A61B5/150633 ,  A61B5/150732 ,  A61B5/1535 ,  A61B5/1545 ,  A61M25/0693 ,  A61M2005/1588

摘要： A needle assembly includes a transparent or translucent housing with a fluid inlet end, a fluid outlet end, a flashback chamber, and a venting mechanism therebetween. Substantially axially aligned inlet and outlet cannulas extend from the housing and communicate with the chamber. A sealable sleeve covers the external end of the outlet cannula. Relative volumes of the cannulas, the chamber, and the sleeve are selected to provide rapid reliable flashback indicative of venous entry with an internal vent positioned within the housing so as to divide the interior into first and second chambers, with the second chamber being adapted to maintain a negative pressure therein relative to the external environment so as to inhibit leakage of blood from the needle on withdrawal from the patient.