US 11,672,588 B2
Phase angle measurement techniques in electrosurgical systems
Kester Julian Batchelor, Mound, MN (US); and Wayne Williams, Penarth (GB)
Assigned to Gyrus ACMI, Inc., Westborough, MA (US)
Filed by GYRUS ACMI, INC., Westborough, MA (US)
Filed on May 14, 2020, as Appl. No. 16/874,466.
Application 16/874,466 is a continuation of application No. PCT/US2020/031857, filed on May 7, 2020.
Claims priority of provisional application 62/905,345, filed on Sep. 24, 2019.
Claims priority of provisional application 62/905,337, filed on Sep. 24, 2019.
Claims priority of provisional application 62/905,366, filed on Sep. 24, 2019.
Claims priority of provisional application 62/905,318, filed on Sep. 24, 2019.
Claims priority of provisional application 62/905,360, filed on Sep. 24, 2019.
Claims priority of provisional application 62/845,647, filed on May 9, 2019.
Prior Publication US 2020/0352631 A1, Nov. 12, 2020
Int. Cl. A61B 18/12 (2006.01); A61B 18/14 (2006.01); A61B 18/00 (2006.01); A61B 17/00 (2006.01)
CPC A61B 18/1206 (2013.01) [A61B 18/00 (2013.01); A61B 18/1233 (2013.01); A61B 18/14 (2013.01); A61B 18/1442 (2013.01); A61B 18/1445 (2013.01); A61B 2017/00017 (2013.01); A61B 2017/00115 (2013.01); A61B 2017/00132 (2013.01); A61B 2017/00154 (2013.01); A61B 2017/00194 (2013.01); A61B 2018/0063 (2013.01); A61B 2018/0072 (2013.01); A61B 2018/0075 (2013.01); A61B 2018/00589 (2013.01); A61B 2018/00595 (2013.01); A61B 2018/00642 (2013.01); A61B 2018/00648 (2013.01); A61B 2018/00654 (2013.01); A61B 2018/00666 (2013.01); A61B 2018/00678 (2013.01); A61B 2018/00684 (2013.01); A61B 2018/00702 (2013.01); A61B 2018/00708 (2013.01); A61B 2018/00714 (2013.01); A61B 2018/00755 (2013.01); A61B 2018/00761 (2013.01); A61B 2018/00767 (2013.01); A61B 2018/00779 (2013.01); A61B 2018/00791 (2013.01); A61B 2018/00827 (2013.01); A61B 2018/00875 (2013.01); A61B 2018/00886 (2013.01); A61B 2018/00898 (2013.01); A61B 2018/00928 (2013.01); A61B 2018/00994 (2013.01); A61B 2018/1455 (2013.01); A61B 2018/1467 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An electrosurgical generator configured to generate and provide a therapeutic signal to biological tissue in electrical communication with a surgical instrument, the surgical generator comprising:
a measurement circuit coupled to a control circuit and configured to measure a reference impedance angle of the biological tissue during an interrogation phase; and
the control circuit in communication with an electrical-energy source, the electrical-energy source electrically coupled to the instrument and configured to generate the therapeutic signal, the control circuit configured to:
control delivery of the therapeutic signal provided to the biological tissue;
compare the measured reference impedance angle with an angle threshold; and
in response to the measured reference impedance angle being greater than the angle threshold;
terminate the delivery of the therapeutic signal; and
generate an error notification signal, wherein the error notification indicates a presence of a conductive foreign body in the biological tissue.