US 11,871,962 B2
Device, a system, and a method for access cannula advancement
Ramin N. Tehrani, Marlborough, MA (US); Christopher A. Benning, Hopkinton, MA (US); and Gregory Thomas Hughes, Hanson, MA (US)
Assigned to BOSTON SCIENTIFIC SCIMED, INC., Maple Grove, MN (US)
Filed by BOSTON SCIENTIFIC SCIMED, INC., Maple Grove, MN (US)
Filed on Feb. 18, 2021, as Appl. No. 17/249,057.
Claims priority of provisional application 62/987,740, filed on Mar. 10, 2020.
Prior Publication US 2021/0282807 A1, Sep. 16, 2021
Int. Cl. A61B 17/34 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/3423 (2013.01) [A61B 17/00234 (2013.01); A61B 2017/00296 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A device, comprising:
a flexible access cannula including a lumen extending therethrough, the flexible access cannula being sized and shaped to extend through a flexible endoscopic shaft to a target tissue within a living body;
a puncturing element sized and shaped to extend through the lumen of the access cannula and distally out a distal end of the access cannula;
a handle including a handle body and an advancement mechanism configured to advance the access cannula from a proximal position relative to the puncturing element, where a puncturing tip of the puncturing element is exposed distal to a distal end of the access cannula, to a distal position relative to the puncturing element, where the distal end of the access cannula covers the puncturing tip of the puncturing element;
a rotation hub fixed to the access cannula and coupled to a proximal end of the handle body, the rotation hub being rotatable relative to the handle body and slidable a second predetermined distance relative to the handle body; and
a cap fixed to the puncturing element and couplable to the rotation hub wherein, when the cap and the rotation hub are coupled, the puncturing tip extends a first predetermined distance relative to the distal end of the access cannula,
wherein the proximal end of the handle body includes an end cap into which a distal portion of the rotation hub is inserted to couple the rotation hub to the handle body, the end cap having a seat against which a first spring is positioned, and
wherein the rotation hub includes a first proximal flange and a second distal flange with a shaft extending therebetween, the shaft having a washer and a second spring slidable thereover and constrained between the first and second flanges.