US 12,167,879 B2
Navigation-enabled cryoablation system with indirect device tracking
Kurt Edmund Guggenberger, North Andover, MA (US); Eugene J. Jung, Jr., San Diego, CA (US); and Steven A. Kubow, Hugo, MN (US)
Assigned to Boston Scientific Scimed, Inc., Maple Grove, MN (US)
Filed by Boston Scientific Scimed Inc., Maple Grove, MN (US)
Filed on Mar. 19, 2021, as Appl. No. 17/206,499.
Claims priority of provisional application 62/991,981, filed on Mar. 19, 2020.
Prior Publication US 2021/0290283 A1, Sep. 23, 2021
Int. Cl. A61B 18/02 (2006.01); A61B 34/20 (2016.01); A61B 18/00 (2006.01); A61B 90/00 (2016.01)
CPC A61B 18/02 (2013.01) [A61B 34/20 (2016.02); A61B 2018/0022 (2013.01); A61B 2018/00357 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00839 (2013.01); A61B 2018/0091 (2013.01); A61B 2018/0212 (2013.01); A61B 2034/2051 (2016.02); A61B 2034/2055 (2016.02); A61B 2034/2059 (2016.02); A61B 2090/3983 (2016.02)] 19 Claims
OG exemplary drawing
 
1. A cryoablation catheter system comprising:
a cryoablation catheter comprising:
a handle,
a tubular shaft having a shaft proximal end and an opposite shaft distal end, the shaft being defined by a tubular shaft wall forming a shaft lumen extending between the shaft proximal end and the shaft distal end, the shaft proximal end being coupled to and extending distally from the handle,
a sheath location sensing element disposed on the shaft distal end, then sheath location sensing element configured to provide a sheath sensor output indicative of a distal shaft end location of the sheath location sensing element within a localization volume response to a localization field,
a tubular guidewire lumen member extending within the shaft lumen and having a guidewire lumen member proximal end and an opposite guidewire lumen member distal end disposed distally of the shaft distal end, the guidewire lumen member being defined by a tubular guidewire lumen member wall forming a guidewire lumen extending between the guidewire lumen member proximal end and the guidewire lumen member distal end;
an expandable cryoballoon having a cryoballoon proximal portion attached to the shaft distal end and a cryoballoon distal portion attached to the guidewire lumen member distal end;
an auxiliary device configured for use in combination with the cryoablation catheter, the auxiliary device having a device proximal portion proximate the handle and a device distal portion disposed distal to the cryoballoon, the device distal portion including a device location sensor configured to provide a device sensor output indicative of a device location of the device location sensor within the localization volume responsive to the localization field; and
a user-accessible relative position indicator on the handle of the cryoablation catheter and the device proximal portion of the auxiliary device configured to provide an indication of a relative position of the cryoballoon with respect to the sheath location sensing element and the device location sensor within the localization field, the indication of the relative position applicable to the sensed distal shaft end location and the device location to determine an actual location of the cryoballoon.