| 摘要 |
A tissue penetrating instrument (10) of the type used in the medical field, wherein the instrument includes an elongated shaft (26) having a penetrating tip (22) mounted on one end thereof. The penetrating tip (22) includes a bas e longitudinally outward from the base and formed into an apex (32), which may be defined by a point, or other configuration specifically structured to facilitate penetration or puncturing of bodily tissue. The apex (32) may be substantially aligned with a linear extension of the central longitudinal ax is or alternatively, may be spaced laterally outward or off-set from the centra l longitudinal axis of the shaft. The penetrating tip (22) further includes an exterior surface extending continuously between the apex and the base and configured to facilitate puncturing and enlargement of the tissue, in a mann er which facilitates separation of the tissue and minimizes cutting, severing o r otherwise damaging the contiguous bodily tissue surrounding the access openi ng.
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