Medical device fixation integrity monitoring and alert
AssigneeMedtronic, Inc.
InventorsMichael P. CAMPBELL, Kevin T. O'BRIEN
Life of this patent
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Abstract
An implantable medical device (IMD) is configured to sense an axis signal along a plurality of axes of a motion sensor of the IMD. The IMD is configured to, for multiple time periods determine a metric from the axis signals. Each of the multiple time periods extend over multiple cardiac cycles. The IMD may determine that the metrics determined for at least a plurality of the multiple time periods meet a dislodgement threshold and detect dislodgement of the IMD in response to the metrics determined for at least the plurality of multiple time periods meeting the dislodgement threshold.
Claims21
An implantable medical device (IMD) comprising:
- a motion sensor configured to sense an axis signal along a plurality of axes of the motion sensor;
- a sensing circuit configured to sense cardiac event signals attendant to myocardial depolarizations;
- a pulse generator configured to generate cardiac pacing pulses;
- and
- a control circuit in communication with the motion sensor, the sensing circuit and the pulse generator, the control circuit configured to:
- determine a first signal from the axis signals sensed over multiple time periods that each extend over a plurality of cardiac cycles;
- for each of the multiple time periods, determine a metric from the first signal;
- determine that the metrics determined for at least a plurality of the multiple time periods meet a dislodgement threshold;
- and
- detect dislodgement of the IMD in response to the metrics determined for at least the plurality of the multiple time periods meeting the dislodgement threshold;
- and
- a communication circuit configured to transmit an IMD dislodgement alert in response to the control circuit detecting the dislodgement.
A method comprising:
- sensing an axis signal along a plurality of axes of a motion sensor of an implantable medical device (IMD);
- determining a first signal from the axis signals sensed over multiple time periods, the multiple time periods each extending over a plurality of cardiac cycles;
- for each of the multiple time periods, determining a metric from the first signal;
- determining that the metrics determined for at least a plurality of the multiple time periods meet a dislodgement threshold;
- detecting dislodgement of the IMD in response to the metrics determined for at least the plurality of the multiple time periods meeting the dislodgement threshold;
- and
- transmitting an IMD dislodgement alert in response to detecting the dislodgement.
A non-transitory, computer-readable storage medium storing a set of instructions which, when executed by a control circuit of an implantable medical device (IMD), cause the IMD to:
- sense an axis signal along a plurality of axes of a motion sensor of the IMD;
- determine a signal from the axis signals sensed over multiple time periods, the multiple time periods each extending over a plurality of cardiac cycles;
- for each of the multiple time periods, determine a metric from the signal;
- determine that the metrics determined for at least a plurality of the multiple time periods meet a dislodgement threshold;
- detect dislodgement of the IMD in response to the metrics determined for at least the plurality of multiple time periods meeting the dislodgement threshold;
- and
- transmit an IMD dislodgement alert in response to detecting the dislodgement.
Dependencies are inferred from the claim text.