Patent ID: 7182757

Claim:
A medical guide wire formed by a helical hollow wire body which is arranged to retractably move against a needle tip of a puncture needle; said helical hollow wire body being formed into a wire-stranded helical hollow tube by stranding a multitude of wire coil elements; said wire coil elements of said wire-stranded helical hollow tube having a stranding angle of 55 degrees or less against an axial direction of said wire-stranded helical hollow tube, and further having an angle more than plus 2 degrees upward inclusive or an angle less than minus 2 degrees downward inclusive against a knife edge angle of said needle tip as an angular range; said needle tip forming a rake surface sharpened by cutting said puncture needle with two-step angles against an axial direction of said puncture needle, said knife edge angle being one which has a close-sliding relationship with said wire-stranded helical hollow tube; and said puncture needle being combined with said helical hollow wire tube.