US 11,672,952 B2
Finding elongation of expandable distal end of catheter
Assaf Govari, Haifa (IL); and Avigdor Rosenberg, Kiryat Tivon (IL)
Assigned to Biosense Webster (Israel) Ltd., Yokneam (IL)
Filed by Biosense Webster (Israel) Ltd., Yokneam (IL)
Filed on Dec. 28, 2018, as Appl. No. 16/234,604.
Prior Publication US 2020/0206461 A1, Jul. 2, 2020
Int. Cl. A61M 25/01 (2006.01); A61B 34/20 (2016.01); A61B 5/06 (2006.01); A61M 25/00 (2006.01); A61M 25/10 (2013.01)
CPC A61M 25/0105 (2013.01) [A61B 5/062 (2013.01); A61B 34/20 (2016.02); A61M 25/0074 (2013.01); A61B 2034/2061 (2016.02); A61B 2560/0223 (2013.01); A61M 25/10 (2013.01); A61M 2025/0166 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A system, comprising:
an expandable distal-end assembly coupled to a distal end of a shaft for insertion into a cavity of an organ of a patient;
a proximal position sensor located at a proximal end of the expandable distal-end assembly;
a distal position sensor located at a distal end of the expandable distal-end assembly; and
a processor, configured to:
based on signals received from the proximal position sensor, estimate a position and a longitudinal direction of the proximal position sensor in a coordinate system used by the processor;
based on signals received from the distal position sensor, estimate a position of the distal position sensor in the coordinate system;
project the estimated position of the distal position sensor on an axis defined by the estimated longitudinal direction; and
calculate an elongation of the expandable distal-end assembly by calculating a distance between the estimated position of the proximal position sensor and the projected position of the distal position sensor.