Patent ID: 7833201

Claim:
A medical infusion device for vascular access with enhanced flashback visualization, comprising: a hub assembly having a proximal portion, a distal portion, a substantially transparent window section, the window section being disposed between the proximal portion and the distal portion; a needle hub mounted on the hub assembly, the needle hub defining a flashback chamber therein, wherein the flashback chamber is received within the hub assembly; a needle having a proximal end, a distal end and a lumen therethrough, the lumen being fluidly coupled to the flashback chamber to allow fluid to flow through the lumen into the flashback chamber; and a contrasting member disposed on at least a portion of an outer surface of the hub assembly, the contrasting member being a patterned member and having a color that provides an effective background to fluid in the flashback chamber, the contrasting member including a portion opposite from the window section such that fluid in the flashback chamber can be viewed through the substantially transparent window section against the contrasting member.