US 11,684,402 B2
Modular battery powered handheld surgical instrument with selective application of energy based on tissue characterization
Frederick E. Shelton, IV, Hillsboro, OH (US); David C. Yates, Morrow, OH (US); Kevin L. Houser, Springboro, OH (US); Jeffrey D. Messerly, Cincinnati, OH (US); Jason L. Harris, Lebanon, OH (US); and Geoffrey S. Strobl, Williamsburg, OH (US)
Assigned to Cilag GmbH International, Zug (CH)
Filed by Cilag GmbH International, Zug (CH)
Filed on Dec. 22, 2020, as Appl. No. 17/131,097.
Application 17/131,097 is a continuation of application No. 15/382,238, filed on Dec. 16, 2016, granted, now 11,229,471.
Claims priority of provisional application 62/330,669, filed on May 2, 2016.
Claims priority of provisional application 62/279,635, filed on Jan. 15, 2016.
Prior Publication US 2021/0212744 A1, Jul. 15, 2021
Int. Cl. A61B 18/14 (2006.01); A61B 18/00 (2006.01); A61B 17/32 (2006.01); A61B 18/12 (2006.01); A61B 17/00 (2006.01); A61B 17/29 (2006.01); A61B 34/00 (2016.01); A61B 90/00 (2016.01)
CPC A61B 18/00 (2013.01) [A61B 18/1445 (2013.01); A61B 2017/003 (2013.01); A61B 2017/00039 (2013.01); A61B 2017/00123 (2013.01); A61B 2017/00314 (2013.01); A61B 2017/00398 (2013.01); A61B 2017/00464 (2013.01); A61B 2017/00734 (2013.01); A61B 2017/2927 (2013.01); A61B 2017/2929 (2013.01); A61B 2017/320078 (2017.08); A61B 2017/320094 (2017.08); A61B 2017/320095 (2017.08); A61B 2018/00297 (2013.01); A61B 2018/00607 (2013.01); A61B 2018/00648 (2013.01); A61B 2018/00666 (2013.01); A61B 2018/00684 (2013.01); A61B 2018/00708 (2013.01); A61B 2018/00767 (2013.01); A61B 2018/00875 (2013.01); A61B 2018/00886 (2013.01); A61B 2018/00898 (2013.01); A61B 2018/00904 (2013.01); A61B 2018/00922 (2013.01); A61B 2018/00946 (2013.01); A61B 2018/00958 (2013.01); A61B 2018/00994 (2013.01); A61B 2018/1226 (2013.01); A61B 2018/1273 (2013.01); A61B 2018/1455 (2013.01); A61B 2034/252 (2016.02); A61B 2034/731 (2016.02); A61B 2090/061 (2016.02); A61B 2560/0209 (2013.01); A61B 2560/0475 (2013.01); A61B 2562/0219 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A surgical system, comprising:
an end effector, comprising:
an ultrasonic blade;
a clamp arm movable relative to the ultrasonic blade to capture tissue therebetween, wherein the clamp arm is movable between a first position, wherein the clamp arm initially contacts the tissue, and a second position, wherein the tissue is compressed between the clamp arm and the ultrasonic blade;
a motor configured to move the clamp arm toward to the ultrasonic blade;
a plurality of impedance sensors positioned on the end effector, wherein the plurality of impedance sensors are configured to:
apply a therapeutic level of RF energy to the tissue;
sense a real time impedance of the tissue;
sense a first tissue impedance based on an initial contact of the plurality of impedance sensors with the tissue, and based on the clamp arm being in the first position;
sense a second tissue impedance of the tissue without applying a therapeutic amount of RF energy to the tissue, and based on the clamp arm being in the second position; and
sense a position of the tissue between the ultrasonic blade and the clamp arm; and
a control circuit operably coupled to the plurality of impedance sensors, wherein the control circuit is configured to:
determine a control parameter of the motor based on the first tissue impedance and the second tissue impedance;
determine a percentage of use of the end effector;
detect a change of the real time impedance of the tissue;
adjust the control parameter of the motor based on the change of the real time impedance of the tissue and the percentage of use of the end effector; and
control delivery of a therapeutic energy application to the tissue, wherein a type of therapeutic energy application delivered to the tissue is selected based on a comparison of the real time impedance of the tissue to a minimum impedance threshold.