Navigational reference dislodgement detection method and system

摘要

A method of tracking a position of a catheter within a patient includes securing a navigational reference at a reference location within the patient, defining the reference location as the origin of a coordinate system, determining a location of an electrode moving within the patient relative to that coordinate system, monitoring for a dislodgement of the navigational reference from the initial reference location, for example by measuring the navigational reference relative to a far field reference outside the patient's body, and generating a signal indicating that the navigational reference has dislodged from the reference location. Upon dislodgement, a user may be provided with guidance to help reposition and secure the navigational reference to the initial reference location, or the navigational reference may be automatically repositioned and secured to the initial reference location. Alternatively, a reference adjustment may be calculated to compensate for the changed reference point/origin.

主权项

1. A method of measuring electrophysiology information using multiple electrodes, comprising:
providing a localization system that determines locations of objects within a 3-D space and generates location information data comprising position information; securing a local reference at an internal reference location within a patient's body, said local reference comprising a first measurement electrode; providing a second measurement electrode within the patient's body; using the localization system to determine a location of the second measurement electrode and providing location information data for the second measurement electrode, said location information data comprising position information determined relative to the internal reference location as a reference point; taking electrophysiology measurements using each of the first and second measurement electrodes and adjusting the output of the second measurement electrode by compensating for at least one signal that is common to each of the first and second measurement electrodes; monitoring for a dislodgement of the local reference from the internal reference location; and generating a signal indicating that the local reference has dislodged from the internal reference location.