US 12,268,414 B2
Retention anchor for surgical access devices
Christopher A. Tokarz, Torrington, CT (US); Kevin Desjardin, Prospect, CT (US); Oksana Buyda, East Haven, CT (US); Douglas M. Pattison, East Hartford, CT (US); Amanda M. Adinolfi, Wallingford, CT (US); and Astley C. Lobo, West Haven, CT (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Feb. 26, 2020, as Appl. No. 16/802,077.
Prior Publication US 2021/0259731 A1, Aug. 26, 2021
Int. Cl. A61B 17/34 (2006.01)
CPC A61B 17/3423 (2013.01) [A61B 2017/3484 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A surgical access assembly comprising:
a cannula including an elongated shaft; and
a retention anchor movably positioned along the elongated shaft, the retention anchor comprising:
an annular body including a proximally-facing surface disposed at a proximal end of the annular body, a distally-facing surface disposed at a distal end of the annular body, an outer side surface, and an inner side surface, the inner side surface defining a channel for reception and passage of the elongated shaft therethrough, the proximally-facing surface defining a proximal opening into the channel at the proximal end of the annular body;
a plurality of ridges extending radially inward from the inner side surface, each ridge of the plurality of ridges having a flat surface and an angled surface, the angled surface defining an acute angle with respect to the flat surface; and
a wiper disposed at the distal end of the annular body, the wiper extending radially inward, the wiper having a flat distal-facing surface aligned with the distally-facing surface of the annular body to define a distal opening into the channel for establishing a sealed relation about the elongated shaft, the distal opening having a smaller diameter than the proximal opening.