Patent ID: 6533760
Filing Date: 2003-03-18
Classification: A61B,A61M

Abstract:
A needle assembly comprising:a housing having a fluid inlet end and an opposed fluid outlet end in communication therewith, the housing comprising an annular chamber and an annular trench adjacent to and in fluid communication with the chamber, the chamber and the trench providing for external visualization of a fluid present therein; a first cannula in fluid communication with said fluid inlet end and extending outwardly therefrom, said first cannula having a first interior extremity with an opening positioned proximate said trench and a first exterior extremity opposite thereto; and a second cannula in fluid communication with said fluid outlet end and extending outwardly therefrom, said second cannula having a second interior extremity with an opening positioned proximate said first interior extremity, said second cannula further having a second exterior extremity opposed to said second interior extremity, wherein a portion of the outside surface of the second cannula delineates the inner wall of the annular trench.