| 摘要 |
A novel dilation system for providing access to a surgical site of interest is provided. The dilator includes a body, an arm, and a plurality of articulating dilation members pivotally connected to the body. The body includes a cavity, and the arm is configured to be accepted by the cavity of the body. The arm includes a distal portion and a proximal portion. The plurality of articulating dilation members are operably connected to the distal portion of the arm, and are movable between a closed position and an open position. The dilator may define a distally tapering generally conical volume in the closed position, and a generally cylindrical volume in the open position. The articulating dilation members are moved from the closed position toward the open position by the arm when the arm is articulated distally, and moved from the open position to the closed position by the arm when the arm is articulated proximally. The arm and the plurality of articulating dilation members include cooperating surfaces that maintain the articulating dilation members in the closed position when the arm is held in place during insertion of the dilator.
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