US 12,144,539 B2
Varying the length of a temperature sensing element of a radiofrequency probe based on desired lesion size
Ruoya Wang, Decatur, GA (US); Tyler W. Crone, Atlanta, GA (US); Joseph DiPietro, Ponte Vedra, FL (US); Jennifer J. Barrett, Alpharetta, GA (US); and Rasagnya M. Viswanadha, Cumming, GA (US)
Assigned to Avent, Inc., Alpharetta, GA (US)
Appl. No. 17/058,701
Filed by Avent, Inc., Alpharetta, GA (US)
PCT Filed May 28, 2019, PCT No. PCT/US2019/034115
§ 371(c)(1), (2) Date Nov. 25, 2020,
PCT Pub. No. WO2019/231880, PCT Pub. Date Dec. 5, 2019.
Claims priority of provisional application 62/677,712, filed on May 30, 2018.
Prior Publication US 2021/0169555 A1, Jun. 10, 2021
Int. Cl. 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 2018/00095 (2013.01); A61B 2018/00339 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00642 (2013.01); A61B 2018/00702 (2013.01); A61B 2018/00797 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for preparing a cooled radiofrequency probe assembly for use to treat tissue of a patient's body, the method comprising:
providing a plurality of cooled radiofrequency probes, each of the plurality of cooled radiofrequency probes comprising an elongate member with a distal region and a proximal region, the distal regions each 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 devices each having:
at least two internal lumens for circulating a cooling fluid through an interior space at a distal end of the energy delivery device, including at least one first internal lumen for delivering fluid from the proximal region of the corresponding elongate member to the interior space, and at least one second internal lumen for returning fluid from the interior space to the proximal region of the corresponding elongate member, and
an electrically and thermally-conductive protrusion extending from the distal end of the energy delivery device and along a central axis of the elongate member, the protrusion comprising a temperature sensing element therein such that the temperature sensing element extends from a distal end of the energy delivery device, wherein a length of the protrusion is different for each of the plurality of cooled radiofrequency probes such that the temperature sensing element of each of the plurality of cooled radiofrequency probes extends a different distance from the distal end of the corresponding energy delivery device, and wherein each of the plurality of cooled radiofrequency probes is associated with a preset profile defining a plurality of parameters, including at least a tissue parameter, maximum allowable temperature, and temperature ramp rate;
determining at least one of a desired lesion size or a desired rate of power delivery required to treat the tissue; and
selecting one probe from the plurality of cooled radiofrequency probes to use to treat the tissue based on the length of the protrusion, and thereby the distance of the corresponding temperature sensing element from the distal end of the energy delivery device of the probe, thereof that achieves the desired lesion size or the desired rate of power delivery,
wherein lesion size is inversely correlated to the length of the electrically and thermally-conductive protrusion, and thereby the distance of the corresponding temperature sensing element from the distal end of the energy delivery device of the probe.