US 11,717,439 B2
Rotational cutter
Niccolo Maschio, Winterthur (CH); Niels Alexander Abt, Wintherthur (CH); Reto Grueebler, Greifensee (CH); Philipp Schaller, Stein am Rhein (CH); Timo Jung, Winterthur (CH); and Rodolfo Wolfer, Schaffhausen (CH)
Assigned to Alcon Inc., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on May 27, 2020, as Appl. No. 16/884,335.
Claims priority of provisional application 62/854,582, filed on May 30, 2019.
Prior Publication US 2020/0375797 A1, Dec. 3, 2020
Int. Cl. A61F 9/007 (2006.01)
CPC A61F 9/00763 (2013.01) 5 Claims
OG exemplary drawing
 
1. A rotational cutter for delaminating a membrane from a retina of an eye, comprising:
a first shaft;
a second shaft comprising a blade portion, wherein the second shaft is coupled to a driver that is configured to at least partially rotate the second shaft relative to the first shaft, wherein rotating the second shaft rotates the blade portion for delaminating the membrane; and
a bottom portion configured to interface with a surface of the retina, wherein the bottom portion comprises one or more curved edges;
wherein:
the blade portion comprises upper teeth; and
the first shaft comprises:
an exposed portion configured to interface with the surface of the retina, the exposed portion having a curved back surface extending continuously from a proximal end of the exposed portion to the bottom portion; and
a second blade portion including the bottom portion, wherein the second blade portion comprises lower teeth;
wherein the lower teeth comprise a plurality of teeth between a left-most outer tooth and an opposing right-most outer tooth, wherein the left-most outer tooth has a greater height on a right side of the left-most outer tooth than a left side of the left-most outer tooth and the right-most outer tooth has a greater height on a left side of the rightmost outer tooth than a right side of the right-most outer tooth;
wherein the left-most outer tooth and the right-most outer tooth have a curved bottom edge extending between their respective left and right sides.