| 摘要 |
An echogenic medical device includes a shaft having a proximal portion, a distal portion, first and second opposing longitudinal sides, and a passageway extending therethrough. The distal end includes a beveled opening communicating with the passageway, and extending between a distal tip portion disposed along the first longitudinal side and a heel portion disposed along the second longitudinal side. A first echogenic region extends circumferentially around the shaft at the distal portion. The first echogenic region is structured for providing a signal visible along the circumference of the shaft under ultrasound visualization. A second echogenic region extends along a length of the second longitudinal side and is substantially aligned with the heel portion. The second echogenic region is structured and arranged for providing a generally linear signal visible under ultrasound examination along the second longitudinal side, and substantially not visible along the first longitudinal side.
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