US 10,945,632 B2 · Navigational reference dislodgement detection method and system

Abstract

A method of detecting dislodgement of a navigational reference for a localization system includes securing a reference catheter, including at least one reference localization element, at an initial reference location within a localization field. The positions of one or more of the reference localization elements are monitored for a perceived displacement that suggests that the reference catheter has become dislodged from the initial reference location (e.g., a displacement above a certain threshold, such as about 4 mm). The direction of this perceived displacement may then be further analyzed (e.g., compared to a predicted or most likely direction of displacement) to determine whether there has been an actual dislodgement of the reference catheter, and, if so, an appropriate signal (e.g., an audible or visual warning) may be generated. Upon dislodgement, guidance may be provided to aid the practitioner in restoring the reference catheter to its initial location.

Claims12

Dependent claims

A method of detecting dislodgement of a navigational reference for a localization system, the method comprising:

establishing a non-ionizing localization field using the localization system;
establishing an initial reference location for a navigational reference catheter relative to a coordinate system defined by the non-ionizing localization field of the localization system;
detecting a perceived dislodgement of the navigational reference catheter from the initial reference location based upon a magnitude of a perceived distance moved by the navigational reference catheter from the initial reference location;
confirming that the perceived dislodgement of the navigational reference catheter from the initial reference location is an actual dislodgement of the navigational reference catheter from the initial reference location when a direction of the perceived dislodgement of the navigational reference catheter from the initial reference location is sufficiently coincident with an anticipated direction of dislodgement, wherein the anticipated direction of dislodgement is parallel to a longitudinal axis of the navigational reference catheter;
and
generating a signal indicating the actual dislodgement of the navigational reference catheter.

3 more elements

Dependencies are inferred from the claim text.

Navigational reference dislodgement detection method and system

Life of this patent

Navigational reference dislodgement detection method and system

Life of this patent

Abstract

Claims12