METHOD AND APPARATUS FOR MAPPING A STRUCTURE
First Claim
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1. A position sensing and map generating unit, comprising:
- a mapping instrument having a position element and operable to be located in a volume, wherein the mapping instrument includes at least one of;
an inflatable portion;
at least two electrodes as the position element;
a guidewire operable to be positioned through a cannula;
a plurality of the position elements along a length of the mapping instrument; and
a temperature sensor;
a position determination processor operable to determine a position of the mapping instrument;
a display device operable to display a map based at least on the determined position of the mapping instrument;
a display processor operable to augment the map on the display device, wherein the display processor is operable to at least one of;
determine a position of the position element that is positioned to sense a voltage formed in the volume;
determine a position of an input impedance reference electrode and display it on the display device relative to the map; and
determine a pseudo position of the axis electrodes on the display device relative to the map;
a physiological measuring device;
an introducer operable to be located with the position determination processor;
a reference electrode at a fixed position on a surface of the volume and a location of the reference electrode is operable to be determined with the position determination processor; and
a procedure instrument with a second position element operable to be located relative to the map;
wherein a map of a volume is displayed on the display device for visualization by a user based solely on determined positions of one or more of the position elements.
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Abstract
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.
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Citations
23 Claims
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1. A position sensing and map generating unit, comprising:
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a mapping instrument having a position element and operable to be located in a volume, wherein the mapping instrument includes at least one of; an inflatable portion; at least two electrodes as the position element; a guidewire operable to be positioned through a cannula; a plurality of the position elements along a length of the mapping instrument; and a temperature sensor; a position determination processor operable to determine a position of the mapping instrument; a display device operable to display a map based at least on the determined position of the mapping instrument; a display processor operable to augment the map on the display device, wherein the display processor is operable to at least one of; determine a position of the position element that is positioned to sense a voltage formed in the volume; determine a position of an input impedance reference electrode and display it on the display device relative to the map; and determine a pseudo position of the axis electrodes on the display device relative to the map; a physiological measuring device; an introducer operable to be located with the position determination processor; a reference electrode at a fixed position on a surface of the volume and a location of the reference electrode is operable to be determined with the position determination processor; and a procedure instrument with a second position element operable to be located relative to the map; wherein a map of a volume is displayed on the display device for visualization by a user based solely on determined positions of one or more of the position elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of determining a position and displaying a map, comprising:
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tracking a position of a position element in a volume; collecting positions of the position element; determining a validity of the collected positions; generating a map based on the collected positions; displaying the map on a display device; measuring a rhythmic feature of a volume; wherein tracking the position element, includes at least one of; selecting between a uni-polar and bi-polar collection of positions; determining whether an interfering frequency is present during or prior to collecting the positions; inflating a portion of the mapping instrument; fixing a location of a first position element relative to a second position element; moving a flexible member with a first position element relative to a second position element at a fixed position and measuring the position of the first member position element relative to the second position element; measuring a temperature within the volume at least one of the position element, the first position element, and the second position element; and displaying on a display device at least one of; a corrected map data generated by reducing distortion of a measured position of a mapping instrument by determining a scaling factor between two position elements of the mapping instrument; a pseudo location of an axis electrode relative to the map; a location of a reference electrode relative to the map; a location of a feature determined by generating a filled volume and determining curvilinear portions to be displayed relative to the filled volume with the mapping instrument; a map point determined by generating a virtual point based on a known position of a physical portion of the mapping instrument relative to a position element of the mapping instrument; the map based on locations categorized relative to the measured rhythmic feature; a virtual map data point determined based on a geometry of the mapping instrument relative to the position element; and a location of an introducer through which the mapping instrument or the procedure instrument is passed. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification