| 摘要 |
A hyperechogenie needle includes a rigid shaft, which can be a hollow metal cannula, having a hyperechogenic particulate material affixed on an outer surface of the shaft that provides for enhanced visualization of the needle in two-dimensional (2D) ultrasound, particularly when the needle is in a position forming a non-90° angle between the longitudinal axis and the direction of the ultrasound waves in the two-dimensional ultrasound plane. The hyperechogenic particulate material can be covered by a polymeric coating or embedded in a polymeric material to provide a hyperechogenic layer. The polymeric coating and polymeric material can be electrically non-conductive or electrically conductive The enhanced visualization improves the accuracy with which the needle tip is placed in a target position, thereby enhancing the effectiveness of a procedure that relics upon accurate placement of the needle tip and reducing pain and tissue trauma.
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