Patent ID: 6110160
Filing Date: 2000-08-29
Classification: A61B

Abstract:
A blood extraction device, comprising:a holder having a chamber formed with an end wall;a hollow cannula fixed in said end wall of said holder and having a sharpened pointed end externally of said chamber and adapted to pierce a blood vessel and another end extending into said chamber, said cannula having an outer surface of constant diameter between said ends;a closed-end flexible rubber valve tube surrounding said other end of said hollow cannula and defining an air-filled space between said valve tube and said other end of said cannula; andmeans on said holder engaging said valve tube from an outer side thereof and including an axially inwardly extending deformable tubular member unitary with said end wall of said holder plastically and permanently deformed conically inwardly into radial engagement with said valve tube to press said valve tube against said surface of said cannula at least at a mouth of said tubular member to retain said valve tube in position in said chamber and on said holder.