Patent ID: 9044244
Filing Date: 2015-06-02
Classification: A61B,A61M,A61N

Abstract:
1. Apparatus for detecting metal disturbance during a medical procedure comprising: a probe, which comprises: a processor coupled to the probe, the processor configured to determine a force measurement using the joint sensor; apply a current to one of the first subassembly and the second subassembly, thereby causing the one of the first subassembly and the second subassembly to generate at least one magnetic field; receive and process one or more signals output by the other of the first subassembly and the second subassembly responsive to the at least one magnetic field so as to detect changes in a position of the distal tip relative to the distal end of the insertion tube, apply current to one coil of the two or more other coils of the second subassembly; measure a signal output by a remainder of the two or more other coils of the second subassembly, the signal output by a remainder of the two or more other coils of the second subassembly defining a pickup value; compare the pickup value to a pre-established baseline value stored in the processor; and identify a presence of a metal object near a distal end of the probe when the pickup value is outside of a range of the pre-established baseline value to invalidate the force measurement.