Dynamic adaptive respiration compensation with automatic gain control
First Claim
1. A method for determining a motion compensated location of an electrode of a medical device within a body of a patient, comprising the steps of:
- (A) acquiring (i) patch electrode impedance data using associated body surface electrodes and (ii) electrode location data using said electrode of said medical device;
(B) mean-adjusting, using a computer system, the patch electrode impedance data associated with body surface electrodes and the electrode location data associated with said electrode;
(C) determining, using the computer system, an acquired set of weights such that a linear combination of the product of the weights and mean-adjusted patch impedance data correspond to the mean-adjusted electrode location data;
(D) repeating steps (A), (B), and (C) for a plurality of different time periods and producing a plurality of sets of weights, and as each successive acquired sets of weights is determined in step (C),(i) determining, using the computer system, a learning parameter based on a distance between successive, acquired sets of weights,(ii) updating, using the computer system, a reference set of weights based on the determined learning parameter;
(E) determining, using the computer system, a compensation signal using the reference set of weights and patch electrode impedance data wherein the compensation signal corresponds to motion artifacts associated with an uncompensated electrode location and wherein the compensation signal is configured to reduce such motion artifacts associated with the uncompensated electrode location;
(F) computing, using the computer system, the motion compensated electrode location using the uncompensated electrode location and the compensation signal; and
(G) generating a visual representation of the medical device on a display based on the motion compensated electrode location.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for determining a location of an electrode of a medical device (e.g., a catheter) in a body of a patient includes a localization block for producing an uncompensated electrode location, a motion compensation block for producing a compensation signal (i.e., for respiration, cardiac, etc.), and a mechanism for subtracting the compensation signal from the uncompensated electrode location. The result is a corrected electrode location substantially free of respiration and cardiac artifacts. The motion compensation block includes a dynamic adaptation feature which accounts for changes in a patient'"'"'s respiration patterns as well as intentional movements of the medical device to different locations within the patient'"'"'s body. The system further includes an automatic compensation gain control which suppresses compensation when certain conditions, such as noise or sudden patch impedance changes, are detected.
32 Citations
18 Claims
-
1. A method for determining a motion compensated location of an electrode of a medical device within a body of a patient, comprising the steps of:
-
(A) acquiring (i) patch electrode impedance data using associated body surface electrodes and (ii) electrode location data using said electrode of said medical device; (B) mean-adjusting, using a computer system, the patch electrode impedance data associated with body surface electrodes and the electrode location data associated with said electrode; (C) determining, using the computer system, an acquired set of weights such that a linear combination of the product of the weights and mean-adjusted patch impedance data correspond to the mean-adjusted electrode location data; (D) repeating steps (A), (B), and (C) for a plurality of different time periods and producing a plurality of sets of weights, and as each successive acquired sets of weights is determined in step (C), (i) determining, using the computer system, a learning parameter based on a distance between successive, acquired sets of weights, (ii) updating, using the computer system, a reference set of weights based on the determined learning parameter; (E) determining, using the computer system, a compensation signal using the reference set of weights and patch electrode impedance data wherein the compensation signal corresponds to motion artifacts associated with an uncompensated electrode location and wherein the compensation signal is configured to reduce such motion artifacts associated with the uncompensated electrode location; (F) computing, using the computer system, the motion compensated electrode location using the uncompensated electrode location and the compensation signal; and (G) generating a visual representation of the medical device on a display based on the motion compensated electrode location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 17)
-
-
14. A method for determining a motion compensated location of magnetic field sensor of a medical device within a body of a patient, comprising the steps of:
-
(A) acquiring (i) patch electrode impedance data using associated body surface electrodes and (ii) magnetic sensor location data using said magnetic field sensor; (B) mean-adjusting, using a computer system, the patch electrode impedance data associated with body surface electrodes and the magnetic sensor location data associated with said magnetic field sensor; (C) determining, using the computer system, an acquired set of weights such that a linear combination of the product of the weights and mean-adjusted patch impedance data correspond to the mean-adjusted magnetic sensor location data; (D) repeating steps (A), (B), and (C) for a plurality of different time periods and producing a plurality of sets of weights, and as each successive acquired sets of weights is determined in step (C), (i) determining, using the computer system, a learning parameter based on a distance between successive, acquired sets of weights, (ii) updating, using the computer system, a reference set of weights based on the determined learning parameter; (E) determining, using the computer system, a compensation signal using the reference set of weights and patch electrode impedance data wherein the compensation signal corresponds to motion artifacts associated with an uncompensated magnetic field sensor location and wherein the compensation signal is configured to reduce such motion artifacts associated with the uncompensated magnetic field sensor location; (F) computing, using the computer system, the motion compensated magnetic field sensor location using the uncompensated magnetic field sensor location and the compensation signal; and (G) generating a visual representation of the medical device on a display based on the compensated magnetic field sensor location. - View Dependent Claims (16)
-
-
18. A method for determining a motion compensated location of a first electrode of a medical device within a body of a patient, comprising the steps of:
-
(A) acquiring (i) patch electrode impedance data using associated body surface electrodes and (ii) first electrode location data using said first electrode of said medical device; (B) mean-adjusting, using a computer system, the patch electrode impedance data associated with body surface electrodes and the first electrode location data associated with said electrode; (C) determining, using the computer system, an acquired set of weights such that a linear combination of the product of the weights and mean-adjusted patch impedance data correspond to the mean-adjusted first electrode location data; (D) repeating steps (A), (B), and (C) for a plurality of different time periods and producing a plurality of sets of weights, and as each successive acquired sets of weights is determined in step (C), (i) determining, using the computer system, a learning parameter based on a distance between successive, acquired sets of weights, (ii) updating, using the computer system, a reference set of weights based on the determined learning parameter; (E) determining, using the computer system, a compensation signal using the reference set of weights and patch electrode impedance data wherein the compensation signal corresponds to motion artifacts associated with an uncompensated first electrode location and wherein the compensation signal is configured to reduce such motion artifacts associated with the uncompensated first electrode location; (F) computing, using the computer system, the motion compensated first electrode location using the uncompensated first electrode location and the compensation signal; G) displaying a representation of the medical device on a display based on the compensated first electrode location; and H) positioning a second electrode of the medical device within the body based on the representation of the medical device, wherein the second electrode is configured to act on the patient to perform at least one of a diagnostic procedure and therapeutic procedure.
-
Specification