US 12,402,959 B2
Hybrid approach to distortion detection
Adam C. Fischbach, Inver Grove Heights, MN (US); and Scott Meyerson, Ham Lake, MN (US)
Assigned to ST JUDE MEDICAL INTERNATIONAL HOLDING S.À, Luxembourg (LU)
Filed by ST JUDE MEDICAL INTERNATIONAL HOLDING S.À R.L., Luxembourg (LU)
Filed on Feb. 29, 2024, as Appl. No. 18/591,975.
Application 18/591,975 is a continuation of application No. 17/968,534, filed on Oct. 18, 2022, granted, now 11,950,857.
Application 17/968,534 is a continuation of application No. 17/139,877, filed on Dec. 31, 2020, granted, now 11,504,189, issued on Nov. 22, 2022.
Claims priority of provisional application 62/971,039, filed on Feb. 6, 2020.
Prior Publication US 2024/0341857 A1, Oct. 17, 2024
Int. Cl. A61B 34/20 (2016.01); A61B 5/06 (2006.01)
CPC A61B 34/20 (2016.02) [A61B 5/062 (2013.01); A61B 5/063 (2013.01); A61B 5/068 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for detecting magnetic field distortion in a hybrid magnetic and impedance tracking system for navigating a medical device within a patient, the method comprising:
receiving first magnetic sensor location data from a magnetic sensor in response to a generated magnetic field at a first time;
receiving first impedance data from an impedance sensor;
receiving second magnetic sensor location data from the magnetic sensor in response to the generated magnetic field at a second time;
receiving second impedance data from the impedance sensor;
detecting a change in location of the magnetic sensor based on a comparison of the first magnetic sensor location data and the second magnetic sensor location data; and
determining whether the change in location of the magnetic sensor is caused by magnetic field distortion or physical movement of the magnetic sensor based on the first and second magnetic sensor location data and the first and second impedance data.