Patent ID: 8167851

Claim:
A safety transfusion needle catheter, comprising: a metal guiding needle having a wedge-shaped needle tip, a flexible retention tube encircling said metal guiding needle, wherein an angle between an end surface of a first end of said flexible retention tube and a longitudinal tube wall of said flexible retention tube is less than 90-degree; and a needle handle connected with a second end of said flexible retention tube, wherein in a cross section of said needle handle, an outer contour line thereof is a closed curve formed with a curve intersecting a beeline, wherein, a first end surface of said first end of said flexible retention tube at one side of said metal guiding needle is parallel to a wedge surface of said wedge-shaped needle tip, an angle between a second end surface of said first end of said flexible retention tube at another side of said metal guiding needle and said longitudinal tube wall of said flexible retention tube is more than 90-degree forming a chamfer angle at said another side of said metal guiding needle, said first end surface and said second end surface of said first end of said flexible retention tube smoothly extend to two longitudinal tube walls of said flexible retention tube, respectively for forming a smooth curve connection between said end surface and said longitudinal tube wall of said flexible retention tube.