US 12,232,801 B2
System and method for mitigating rising impedance via a pump assembly during use of cooled radiofrequency probes
Ruoya Wang, Decatur, GA (US); Jennifer J. Barrett, Alpharetta, GA (US); Joseph DiPietro, Ponte Vedra, FL (US); Rasagnya M. Viswanadha, Cumming, GA (US); and Tyler W. Crone, Atlanta, GA (US)
Assigned to Avent, Inc., Alpharetta, GA (US)
Appl. No. 17/058,718
Filed by Avent, Inc., Alpharetta, GA (US)
PCT Filed May 28, 2019, PCT No. PCT/US2019/034164
§ 371(c)(1), (2) Date Nov. 25, 2020,
PCT Pub. No. WO2019/231907, PCT Pub. Date Dec. 5, 2019.
Claims priority of provisional application 62/677,714, filed on May 30, 2018.
Prior Publication US 2021/0169556 A1, Jun. 10, 2021
Int. Cl. A61B 18/12 (2006.01); A61B 18/14 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/148 (2013.01) [A61B 2018/00023 (2013.01); A61B 2018/00077 (2013.01); A61B 2018/00083 (2013.01); A61B 2018/00095 (2013.01); A61B 2018/00339 (2013.01); A61B 2018/00434 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00589 (2013.01); A61B 2018/00678 (2013.01); A61B 2018/00797 (2013.01); A61B 2018/00875 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of treating tissue of a patient's body, the method comprising:
providing a power source coupled to at least one probe assembly, the at least one probe assembly comprising an elongate member with a distal region and a proximal region, the distal region having an electrically and thermally-conductive energy delivery device for delivering one of electrical and radiofrequency energy to the patient's body, the electrically and thermally-conductive energy delivery device having one or more internal lumens for circulating a cooling fluid therethrough and an electrically and thermally-conductive protrusion having a temperature sensing element, the temperature sensing element extending from a distal end of the energy delivery device;
inserting the energy delivery device of the at least one probe assembly into the patient's body;
routing the energy delivery device of the at least one probe assembly to the tissue of the patient's body;
simultaneously circulating the cooling fluid through the one or more internal lumens via at least one pump assembly and delivering energy from the power source to the tissue through the energy delivery device;
monitoring one or more procedure parameters while delivering the energy from the power source to the tissue through the energy delivery device;
determining, in real-time, whether a rising impedance event is likely to occur in a predetermined time period based on the one or more procedure parameters including at least one of a temperature of the tissue, an impedance of the tissue, and a power demand of the energy delivery device;
responsive to determining that the rising impedance event is likely to occur in the predetermined time period, decreasing a flow rate of the at least one pump assembly; and
responsive to determining that the rising impedance event is unlikely to occur in the predetermined time period, increasing the flow rate of the at least one pump assembly up to a predetermined maximum flow rate or rotational speed.