US 12,082,840 B2
Surgical instrument with tip for resection of tissue with combined longitudinal and torsional vibration
Cathal Heavey, Midleton (IE)
Assigned to Stryker European Operations Holdings LLC, Kalamazoo, MI (US)
Filed by Stryker European Operations Holdings LLC, Kalamazoo, MI (US)
Filed on May 24, 2021, as Appl. No. 17/328,102.
Application 17/328,102 is a continuation of application No. 15/843,740, filed on Dec. 15, 2017, granted, now 11,109,880.
Application 15/843,740 is a continuation of application No. PCT/US2016/037582, filed on Jun. 15, 2016.
Claims priority of provisional application 62/180,656, filed on Jun. 17, 2015.
Prior Publication US 2021/0275208 A1, Sep. 9, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/32 (2006.01)
CPC A61B 17/320068 (2013.01) [A61B 2017/320078 (2017.08); A61B 2017/320098 (2017.08)] 21 Claims
OG exemplary drawing
 
1. A surgical instrument configured to be coupled to an ultrasonic oscillation mechanism for resection of tissue under suction, said surgical instrument comprising:
a shaft defining a passageway and comprising a vibration conversion mechanism configured to convert vibration transmitted from the ultrasonic oscillation mechanism to a composite motion relative to a longitudinal axis of the shaft; and
a tip extending from said shaft and comprising an inner surface, the inner surface defining a lumen in communication with said passageway of said shaft, an outer surface opposite said inner surface of the lumen, and teeth formed by slots extending from said inner surface of the lumen to said outer surface so that said teeth are circumferentially arranged about said tip, wherein said composite motion of said shaft is configured to move said tip in a combined longitudinal and torsional vibration in a first direction, and in a second direction opposite the first direction,
wherein each of said teeth comprises a planar distal end, a distal cutting edge extending between said inner surface of the lumen and said outer surface at said planar distal end, and a side cutting edge defined between said outer surface and a side surface defining one of said slots, wherein said distal cutting edge and said side cutting edge are configured to slice the tissue with the tip moving in the first direction and pull the tissue with the tip moving in the second direction.