Patent ID: 9392973
Filing Date: 2016-07-19
CPC Classification: A61B

Claim Text:
1. A method of detecting a localization element/sheath state change with a localization system, comprising: establishing a localization field using a plurality of localization field generators; obtaining at least one localization signal from at least one catheter-borne localization element positioned within the localization field via an introducer sheath, the at least one localization signal including an in-phase component and a quadrature component; and detecting a localization element/sheath state change for the at least one catheter-borne localization element based on the quadrature component of the at least one localization signal, wherein detecting the localization element/sheath state change comprises detecting withdrawal of the at least one localization element into the introducer sheath based upon the quadrature component of the at least one localization signal deviating from a reference value by more than a preset amount.