David A. Mire,Paula A. Nichter,Kelli N. Sebastian,Bryant Lee
申请号：
US13280010
公开号：
US20130103103A1
申请日:
2011.10.24
申请国别(地区):
US
年份:
2013
代理人:
摘要：
A dilator includes a first portion and a second portion movable between a first position and a second position. The first portion includes a first wall that defines a first cross section and a first cavity. The second portion includes a second wall that defines a second cross section, which is less than the first cross section, and a second cavity. The second portion dilates and/or dissects tissue adjacent a surgical site. In the first position, the second cavity provides direct visualization of the surgical site and the first cavity supports an instrument. In the second position, the second cavity is expandable such that the instrument is movable along the longitudinal axis in the second cavity. Methods of use are disclosed.
