US 11,051,849 B2
Cannula assembly with collapsible fixation device
Oksana Buyda, East Haven, CT (US); and Amanda Adinolfi, Wallingford, CT (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Feb. 19, 2019, as Appl. No. 16/279,169.
Claims priority of provisional application 62/653,859, filed on Apr. 6, 2018.
Prior Publication US 2019/0307486 A1, Oct. 10, 2019
Int. Cl. A61B 17/34 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/3423 (2013.01) [A61B 17/3421 (2013.01); A61B 17/3462 (2013.01); A61B 17/3498 (2013.01); A61B 17/3474 (2013.01); A61B 2017/0042 (2013.01); A61B 2017/00907 (2013.01); A61B 2017/00951 (2013.01); A61B 2017/3484 (2013.01); A61B 2017/3488 (2013.01); A61B 2017/3492 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A cannula assembly comprising:
a housing defining a receptacle;
a seal assembly positioned within the receptacle, the seal assembly being adapted to form a seal about a surgical instrument inserted through the housing;
a cannula shaft extending from the housing and defining a channel, the channel defining a longitudinal axis and having a proximal portion that communicates with the receptacle and an open distal end; and
a sleeve having a proximal portion movably positioned about the cannula shaft and a distal portion axially fixed to a distal portion of the cannula shaft, the sleeve including a deformable mesh material having a deployable anchor member and a thin cover that extends from the proximal portion of the sleeve to a lower portion of the sleeve, leaving the deployable anchor member unrestrained by the cover;
a frustoconical end cap attached to the cannula shaft at the distal end thereof so as to cover the distal portion of the sleeve, the end cap including one or more holes for receiving an adhesive material;
wherein movement of the proximal portion of the sleeve towards the distal portion of the sleeve causes the anchor member of the sleeve to move radially outward away from the longitudinal axis of the cannula shaft, the anchor member being formed of a material that is configured collapse against the cannula shaft when a force is applied to the cannula assembly to facilitate removal of the cannula assembly from within a body cavity of a patient.