Determining A Location Of A Member

摘要

An volume of a patient can be mapped with a system operable to identify a plurality of locations and save a plurality of locations of a mapping instrument. The mapping instrument can include one or more electrodes that can sense a voltage that can be correlated to a three dimensional location of the electrode at the time of the sensing or measurement. Therefore, a map of a volume can be determined based upon the sensing of the plurality of points without the use of other imaging devices. An implantable medical device can then be navigated relative to the mapping data.

主权项

1. A method to locate and determine a position of portions of an instrument in a volume, comprising:
providing an elongated and flexible member extending between a first end and a second terminal end with a first position element having a plurality of first position element portions positioned near the first end and between the first end and the second terminal end and a second position element positioned near the second terminal end; positioning a set of axis generation electrodes on a surface of the volume; injecting a current into the volume between the set of axis generation electrodes; sensing with the first position element and the second position element an electrical property due to the injected current into the volume between the set of axis generation electrodes; evaluating the sensed electrical property sensed with the first position element and the second position element; determining a relative position of the first position element and the second position element based on the evaluation of the electrical property; determining a non-linear geometry of the elongated and flexible member based on the determined relative position of the first position element having the plurality of first position element portions and the second position element; and determining an amount of lead slack of the elongated and flexible member within the volume based on the determined non-linear geometry.