US 9,808,269 B2
Adjustable medical retrieval devices and related methods of use
Tantra S. Budiman, Newton, MA (US); and Michael S. H. Chu, Brookline, MA (US)
Assigned to Boston Scientific Scimed, Inc., Maple Grove, MN (US)
Filed by Boston Scientific Scimed, Inc., Maple Grove, MN (US)
Filed on Dec. 10, 2014, as Appl. No. 14/565,859.
Claims priority of provisional application 61/915,352, filed on Dec. 12, 2013.
Prior Publication US 2015/0164522 A1, Jun. 18, 2015
Int. Cl. A61B 17/221 (2006.01)
CPC A61B 17/221 (2013.01) [A61B 2017/2212 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A medical device, comprising:
a distal end including an expandable grasping portion having a plurality of movable branch members having a lumen, and a continuous filament member connected to and slidably movable within at least a portion of the plurality movable branch members;
a proximal end including a handle having at least two actuation guides and at least two actuation selectors each connected to and movable along one of the at least two actuation guides, wherein the at least two actuation selectors are connected to ends of the continuous filament member in the proximal end of the medical device, and wherein the at least two actuation selectors are movable to vary the size of the grasping portion between a plurality of pre-selected, discrete configurations of the grasping portion; and
a sheath member extending from the distal end toward the proximal end, wherein proximal ends of the plurality of movable branch members are disposed within the sheath member,
wherein the plurality of movable branch members includes at least a first branch member, a second branch member, a third branch member, and a fourth branch member, with each of the branch members having a distal aperture and a proximal aperture,
wherein one end of the one continuous filament member passes through the proximal aperture of a first branch member, out of the distal aperture of the first branch member, into the distal aperture of the third branch member, and out of the proximal aperture of the third branch member, and
wherein a second end of the continuous filament member passes through the proximal aperture of the second branch member, out of the distal aperture of the second branch member, into the distal aperture of the fourth branch member, and out of the proximal aperture of the fourth branch member.