In preferred aspects, the present invention comprises a self-priming needle-free "Y"-adapter for use with intravenous delivery systems. The "Y"-adapter comprises a "Y"-shaped housing having an inlet passageway, an outlet passageway, and an injection access passageway. Each of the three passageways has...http://www.google.com.tw/patents/US6221065?utm_source=gb-gplus-share專利 US6221065 - Self-priming needle-free "Y"-adapter
