Patent ID: 9078707
Filing Date: 2015-07-14
Classification: A61B

Abstract:
1. A system, comprising: a handle; a dilator coupled to the handle; a tubular cannula removably coupled to the handle; a selector having a first pin coupled to the dilator; and a second pin coupled to the dilator, said second pin adapted to provide rotational and axial motion constraints for the system; wherein the system is transformable between a first setting and a second setting by rotating the first pin into or out of engagement with a groove of the dilator; wherein, in the first setting, the dilator is fixed to the handle in an extended position in which a first length of the dilator protrudes from the handle and the cannula is fixed to the handle so that a length of the cannula protrudes from the handle and the dilator extends through the cannula less than the first length of the dilator; wherein, in the second setting, the dilator is slidable relative to the handle between the extended position and a retracted position in which a second length of the dilator protrudes from the handle, the second length being less than the first length and the cannula being removable from the handle, wherein the dilator is biased toward the extended position to temporarily overcome the retracted position, wherein the dilator comprises the groove and a flat; wherein, in the first setting, the first pin engages the groove to fix the dilator to the handle; wherein, in the second setting, the first pin engages the flat to permit the dilator to slide relative to the handle between the extended position and the retracted position, wherein the dilator is rotationally fixed to the handle in the extended and retracted positions.