IMPLANTABLE MEDICAL DEVICE RESPONSIVE TO MRI INDUCED CAPTURE THRESHOLD CHANGES
First Claim
Patent Images
1. A method for controlling energy delivered from an implantable medical device to stimulate body tissue within a patient, the method comprising:
- changing energy delivered to stimulate the tissue from a first energy state to a second energy state during a magnetic resonance imaging (MRI) scan;
maintaining the energy delivered at the second energy state after the MRI scan;
measuring a capture threshold of the tissue; and
adjusting the energy delivered based on the measured capture threshold of the tissue.
1 Assignment
0 Petitions
Accused Products
Abstract
Energy delivered from an implantable medical device to stimulate tissue within a patient'"'"'s body is controlled. An electrical signal used to stimulate the tissue is changed from a first energy state to a second energy state during a magnetic resonance imaging (MRI) scan. The energy delivered is maintained at the second energy state after the MRI scan. A capture threshold of the tissue is then measured, and the energy delivered to the tissue is adjusted based on the measured capture threshold of the tissue.
-
Citations
20 Claims
-
1. A method for controlling energy delivered from an implantable medical device to stimulate body tissue within a patient, the method comprising:
-
changing energy delivered to stimulate the tissue from a first energy state to a second energy state during a magnetic resonance imaging (MRI) scan; maintaining the energy delivered at the second energy state after the MRI scan; measuring a capture threshold of the tissue; and adjusting the energy delivered based on the measured capture threshold of the tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for controlling energy delivered from an implantable medical device to stimulate body tissue within a patient, the method comprising:
-
delivering energy having a first energy level to stimulate the tissue; detecting magnetic resonance imaging (MRI) scan fields; increasing the energy delivered from the first energy level to a second energy level; maintaining the energy delivered at the second energy level after the MRI scan fields are no longer detected; measuring a capture threshold of the tissue; and adjusting the energy delivered by the implantable medical device based on the measured capture threshold of the tissue. - View Dependent Claims (10, 11, 12, 13)
-
-
14. An implantable medical device comprising:
-
a lead including an electrode adapted to electrically stimulate body tissue; sensing circuitry operable to receive signals through the lead based on electrical activity of the tissue; therapy circuitry operable to deliver electrical stimulation to the tissue through the lead, wherein the sensing and therapy circuitry is further operable to measure a capture threshold of the tissue; magnetic field detection circuitry operable to detect magnetic resonance imaging (MRI) scan fields; and control circuitry operable to set energy delivered by the therapy circuitry to stimulate the tissue from a normal energy state to an MRI mode energy state when the magnetic detection circuitry detects the MRI scan fields, and, after the magnetic field detection circuitry no longer detects the MRI scan fields, to adjust the energy delivered based on the measured capture threshold of the tissue. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification