Patent ID: 6375664
Filing Date: 2002-04-23
Classification: A61B,A61M

Abstract:
A medical anesthetic needle which comprisesa hollow outer needle having a front end portion bent in an upward direction, said front end portion terminating in a hollow blade surface opening, an inner needle having a solid blade tip portion containing a blade surface that plugs the hollow blade surface opening of the hollow outer needle, said inner needle having a front end portion bent in an upward direction, a columnar portion having a diameter approximately equal to the inner diameter of the hollow outer needle and a connecting portion connecting the tip portion and the columnar portion together as one piece, said connecting portion having a split-columnar shape, with the circular circumferential surface thereof extended flush to the circumferential surfaces of said blade tip portion and said columnar portion, and having an axial length not less than three times said diameter, said connecting portion having the bottom surface thereof positioned higher than the axis of said columnar portion when said inner needle has an axis thereof laid horizontal with said blade surface positioned facing upward, said connecting portion being bent so that an upper end of said blade surface is located higher than the top surface line of said columnar portion by a predetermined distance and said solid blade tip portion has an axis which is inclined at a predetermined angle, relative to horizontal, when the inner needle has its axis laid horizontal with said blade surface positioned facing upward.