US 12,256,954 B2
System and method for controlling an ultrasonic tool
Adam Darwin Downey, Kalamazoo, MI (US)
Assigned to Stryker Corporation, Portage, MI (US)
Filed by Stryker Corporation, Kalamazoo, MI (US)
Filed on Aug. 11, 2023, as Appl. No. 18/232,872.
Application 18/232,872 is a continuation of application No. 17/750,692, filed on May 23, 2022, granted, now 11,723,683.
Application 17/750,692 is a continuation of application No. 17/154,324, filed on Jan. 21, 2021, granted, now 11,337,718, issued on May 24, 2022.
Application 17/154,324 is a continuation of application No. 15/742,361, granted, now 10,945,753, issued on Mar. 16, 2021, previously published as PCT/US2016/042193, filed on Jul. 14, 2016.
Claims priority of provisional application 62/192,838, filed on Jul. 15, 2015.
Prior Publication US 2023/0380855 A1, Nov. 30, 2023
Int. Cl. A61B 17/32 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/320068 (2013.01) [A61B 2017/00017 (2013.01); A61B 2017/0015 (2013.01); A61B 2017/00154 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of controlling an ultrasonic surgical tool to reduce presence of a harmonic signal, the ultrasonic surgical tool including a handpiece and a tip coupled to the handpiece, the handpiece including a transducer for vibrating the tip upon receive of a drive signal, the method comprising:
obtaining a value of a capacitance of the handpiece;
driving the ultrasonic surgical tool with a first drive signal;
acquiring at least one characteristics of the harmonic signal resulting from driving the ultrasonic surgical tool with the first drive signal based on the obtained capacitance value;
generating a cancellation signal based on the at least one acquired characteristic of the harmonic signal;
combining the first drive signal and the cancellation signal to produce a second drive signal; and
driving the ultrasonic surgical tool with the second drive signal such that presence of the harmonic signal resulting from driving the ultrasonic surgical tool with the second drive signal is reduced relative to presence of the harmonic signal resulting from driving the ultrasonic surgical tool with the first drive signal.