Patent ID: 9028522
Filing Date: 2015-05-12
Classification: A61B

Abstract:
1. A dilator system comprising: a first dilator including a wall having an exterior first cross-sectional shape, and the first dilator having a first longitudinal axis extending from a proximal end of the first dilator to a distal end of the first dilator and centrally disposed relative to the exterior first cross-sectional shape; a second dilator including a wall having an interior second cross-sectional shape and an exterior third cross-sectional shape, wherein the interior second cross-sectional shape is configured to mate with the exterior first cross-sectional shape, the periphery of the interior second cross-sectional shape and the exterior third cross-sectional shape being at least partially interrupted by a longitudinal gap extending at least a portion of the length of the second dilator, wherein the second dilator further includes a channel having a longitudinal opening formed by the longitudinal gap, the channel being configured to slidingly receive the first dilator therethrough; wherein the interior second cross-sectional shape of the second dilator wall comprises an interior straight-line segment and the exterior third cross-sectional shape of the second dilator wall comprises an exterior straight-line segment, and the interior straight-line segment and the exterior straight-line segment are parallel to each other; and wherein the exterior straight-line segment is longer than the interior straight-line segment.