US 10,376,299 B2
Distal balloon impedance and temperature recording to monitor pulmonary vein ablation and occlusion
Boaz Avitall, Chicago, IL (US); and Catherine R. Condie, Shoreview, MN (US)
Assigned to Medtronic CryoCath LP, Toronto, Ontario (CA)
Filed by Medtronic CryoCath LP, Toronto (CA)
Filed on Aug. 28, 2017, as Appl. No. 15/688,107.
Application 15/688,107 is a continuation of application No. 14/560,793, filed on Dec. 4, 2014, granted, now 9,993,279.
Claims priority of provisional application 61/912,991, filed on Dec. 6, 2013.
Prior Publication US 2017/0354449 A1, Dec. 14, 2017
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 18/02 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/02 (2013.01) [A61B 2018/0022 (2013.01); A61B 2018/00404 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00684 (2013.01); A61B 2018/00821 (2013.01); A61B 2018/00875 (2013.01); A61B 2018/0212 (2013.01); A61B 2018/0268 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for cryoablating tissue, the system comprising:
a cryoablation device, the cryoablation device including:
a balloon coupled to a distal portion of the cryoablation device;
a first electrode located immediately distal to the balloon; and
a second electrode located a distance from the first electrode and distal to the balloon; and
a console including a processor, the processor configured to:
record a first plurality of impedance measurements from the first electrode and the second electrode;
record a second plurality of impedance measurements from the first electrode and the second electrode;
determine a first impedance slope using the first plurality of impedance measurements from the first electrode and determine a second impedance slope using the second plurality of impedance measurements from the first electrode;
compare the first slope to a first reference slope and compare the second slope to a second reference slope; and
determine whether the balloon catheter is creating a permanent lesion in the tissue based on the comparison of the first slope to the first reference slope and the comparison of the second slope to the second reference slope.