US 12,446,912 B2
Device and method for treating tissue
Jörg Mayer, Niederlenz (CH); Andrè Schwery, Biberist (CH); Loïc Sottas, Lausanne (CH); and Dominique Neuhaus, Zürich (CH)
Assigned to BOSONIC AG, Bern (CH)
Appl. No. 17/436,401
Filed by BOSONIC AG, Bern (CH)
PCT Filed Mar. 9, 2020, PCT No. PCT/EP2020/056276
§ 371(c)(1), (2) Date Sep. 3, 2021,
PCT Pub. No. WO2020/182775, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 00282/19 (CH), filed on Mar. 8, 2019.
Prior Publication US 2022/0142666 A1, May 12, 2022
Int. Cl. A61B 17/32 (2006.01); A61B 17/16 (2006.01); A61B 17/00 (2006.01); B06B 1/06 (2006.01); B22F 10/28 (2021.01); B22F 10/62 (2021.01)
CPC A61B 17/320068 (2013.01) [A61B 17/1604 (2013.01); A61B 17/1633 (2013.01); A61B 17/1659 (2013.01); A61B 2017/00526 (2013.01); A61B 2017/320069 (2017.08); A61B 2017/32007 (2017.08); A61B 2017/320074 (2017.08); A61B 2017/320078 (2017.08); A61B 2017/320084 (2013.01); A61B 2217/005 (2013.01); B06B 1/0611 (2013.01); B22F 10/28 (2021.01); B22F 10/62 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A sonotrode for an ultrasonic surgical instrument, the sonotrode comprising a stem extending along a longitudinal axis and a cap configured to carry out an ablative process on tissue using mechanical oscillation, wherein the cap comprises at least one portion that protrudes further in a radial direction than the stem, wherein the at least one portion comprises at least one sharp rim, wherein the cap has a surface arranged between a distal end of the stem and the sharp rim of the at least one portion, wherein the surface is concave and/or runs at an opening angle with respect to the stem that is equal to or smaller than 90 degrees, wherein the cap comprises a convex surface, wherein the convex surface provides a soft and/or smooth surface, and wherein each of the at least one portion protruding further in the radial direction than the stem has over a range of radial angles larger than 160 degrees a radial extension that is larger than a maximal radial extension of the stem with respect to the longitudinal axis.