主权项 |
1. A needle for viewing under ultrasound imaging whereby an ultrasound wave is directed to the needle from an ultrasound transducer so that a reflection image of the needle may be received by the transducer, comprising:
a shaft extending along a longitudinal axis having a proximal end and a distal end including a sharp tip, one and other grooves spirally formed clockwise and counterclockwise, respectively, from at least adjacent the sharp tip along a distal portion of the shaft so that the one and other grooves crisscross each other a predetermined distance along the distal portion, the one and other grooves each being at a neutral position relative to the longitudinal axis of the shaft, each of the one and other grooves has an increased pitch density that enhances the reflection of the ultrasound wave directed to the shaft as an improved reflection image back to the transducer. |