US 12,226,116 B2
Ultrasonic tip with protrusion defining a preaspiration hole
Guillaume Gras, Bienne (CH); Cathal Heavey, Midleton (IE); and Conor McCarthy, West Cork (IE)
Assigned to Stryker European Operations Holdings LLC, Portage, MI (US)
Appl. No. 17/278,682
Filed by Stryker European Operations Holdings LLC, Kalamazoo, MI (US)
PCT Filed Sep. 23, 2019, PCT No. PCT/US2019/052451
§ 371(c)(1), (2) Date Mar. 23, 2021,
PCT Pub. No. WO2020/068678, PCT Pub. Date Apr. 2, 2020.
Claims priority of provisional application 62/735,440, filed on Sep. 24, 2018.
Prior Publication US 2021/0393286 A1, Dec. 23, 2021
Int. Cl. A61B 17/32 (2006.01)
CPC A61B 17/320068 (2013.01) [A61B 2017/32007 (2017.08); A61B 2017/320072 (2013.01); A61B 2017/320084 (2013.01); A61B 2017/320098 (2017.08)] 27 Claims
OG exemplary drawing
 
1. An ultrasonic tip for use with a surgical handpiece to produce both longitudinal and torsional motion, the handpiece including an ultrasonic transducer disposed within a housing, said ultrasonic tip comprising:
a shaft having a longitudinal axis extending between a proximal end and a distal end, said proximal end having a first diameter and said distal end having a second diameter,
wherein said first diameter is greater than said second diameter, and
wherein said shaft comprises a vibration conversion mechanism for converting a vibration energy transmitted from the ultrasonic transducer into a composite vibration composed of a longitudinal vibration along the longitudinal axis and a torsional vibration;
a cutting feature coupled to said distal end of said shaft;
an aspiration lumen defined by said shaft, said aspiration lumen configured to extend along said longitudinal axis of said shaft, said aspiration lumen configured to be placed in fluid communication with the handpiece;
a protrusion on said shaft and positioned between said distal end and said proximal end with said protrusion being positioned distal to said vibration conversion mechanism along said longitudinal axis, a portion of said protrusion having a third diameter, wherein said third diameter is less than said first diameter and said third diameter is greater than said second diameter; and
an aperture defined by said protrusion in fluid communication with said aspiration lumen, wherein said protrusion reinforces an area surrounding the aperture,
wherein said protrusion comprises a first taper region, a median region, and a second taper region, with an external surface of said median region being generally parallel to the longitudinal axis and said median region disposed between said first taper region and said second taper region, said first taper region being proximal to said median region and having a positive slope, and said second taper region being distal to said median region and having a negative slope.