Patent ID: 7022110
Filing Date: 2006-04-04
Classification: A61M

Abstract:
1. A medical needle, comprising: an inner needle to be inserted into living tissue, and a hollow cylindrical outer tube needle to be inserted into the living tissue together with the inner needle, with the inner needle being inserted thereinto, and to be retained in the living tissue after the inner needle is removed, wherein said inner needle includes a tip portion extending out of a front end bore of said outer tube needle and having a spherical crown portion capable of being inserted along a punctured hole previously formed in the living tissue so as not to damage lumen of the punctured hole, and said inner needle further includes: a main body portion having an outside diameter approximately equal to an inside diameter of said outer tube needle; a tapered portion integrally connected to a front end portion of the main body portion, extending along an axis of the main body portion, and having a diameter gradually decreasing to protrude from the front end bore of said outer tube needle; and a small-diameter portion extending by a prescribed length from a front end portion of the tapered portion along said axis, and having a diameter approximately equal to a smallest diameter of a front end portion of the tapered portion, and the spherical crown portion.