| 摘要 |
Disclosed are devices and methods for accessing and channeling through biological tissue One embodiment is a bone access tool including a handle assembly and speculum assembly coupled to the handle assembly The handle assembly has First and second portions that are movable relative to one another The speculum assembly has first and second speculum members movably positioned relative to one another The speculum members define an internal shaft arranged about a central axis and a tapered shape when positioned adjacent one another The tapered shape gradually reduces in size from a proximal pm to a distal edge of the speculum assembly The speculum assembly also has at least one nb extending outwardly from each of the first and second speculum members, the pb having an upper surface and an inclined lower surface.
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