Jeremy J. Albrecht,Charles C. Hart,Eric Nguyen,Haruyasu Yawata,Nabil Hilal
申请号：
US15056056
公开号：
US20160174960A1
申请日:
2016.02.29
申请国别(地区):
US
年份:
2016
代理人:
摘要：
A retraction device that optionally includes a sheath that traverses from outside the body to a body cavity inside the body. The retraction device may include an outer retention ring and a plurality of shapeable extending elements coupled to the retention ring and extending distally therefrom, the extending elements being configured to transition from a first, low-profile, insertion condition to a second, expanded, high-profile retention condition in which distal ends of the extending elements extend radially outwardly. Alternatively, the retraction device may include an outer ring having a substantially annular shape with an adjustable circumference, the outer ring being divided into a plurality of curved ring segments, with a substantially tubular structure extending distally from the outer ring, wherein the diameter of the outer ring is increased by moving the curved ring segments further apart and the diameter is decreased by moving the curved ring segments closer together.
