Patent ID: 8845585
Filing Date: 2014-09-30
Classification: A61M

Abstract:
1. An intravenous catheter set comprising: a barrel having a first end and a second end; a needle assembly, disposed at the first end of the barrel, comprising a needle, a needle hub and a needle piston, wherein the needle is rooted on a tip end of the needle hub, and the needle piston is fastened onto a root end of the needle hub; a catheter, axially connected onto the tip end of the needle hub and passed through by the needle; a stopper, operably disposed at the first end of the barrel, and normally stopping the needle hub from moving; and a vacuum generator, axially disposed in the barrel, and comprising a plunger and a vacuum piston mounted on an end of the plunger, wherein the vacuum piston is slidably received in the barrel and normally abuts against the needle piston, and the plunger protrudes from the second end of the barrel; wherein the barrel forms a vacuum when the plunger is pulled outward, the needle assembly will be pulled toward the second end of the barrel by the vacuum and completely retracted in the barrel when the stopper releases the needle hub.