Echogenic enhancement for a needle

摘要

A needle includes a surface with a plurality of first ultrasound reflecting depressions formed therein. The first depressions are distributed along at least a portion of a length of the needle separated from one another by intervening sections. Each of the first depressions is extending along a curve between first and second ends adjacent to corresponding ones of the intervening sections with troughs at which surfaces of each of the first depressions most closely approach a longitudinal axis of the needle being offset toward the first ends of each of the first depressions.

主权项

1. A needle, comprising:
a surface with a plurality of first ultrasound reflecting depressions formed therein, the first depressions being distributed along at least a portion of a length of the needle separated from one another by intervening sections, each of the first depressions extending along a longitudinal axis of the needle and including a curve having a longitudinally varying curvature between a steep slope at a first end and a shallow slope at a second end, at each of the first ends the steep slope gradually transitions to extend substantially perpendicular to the longitudinal axis of the needle, and the first and second ends of each of the first depressions are adjacent to corresponding ones of the intervening sections with troughs at which surfaces of each of the first depressions most closely approach the longitudinal axis of the needle being offset toward the first ends of each of the first depressions.