Implantable active medical device enslaved to at least one physiological parameter
First Claim
1. An active implantable medical device having a control function enslaved to at least one physiological parameter comprising:
- at least one effort sensor (MV) having a plurality of determinable states, the sensor measuring a primarily physiological parameter and delivering a signal which is a function of effort exerted by a patient bearing the device;
at least one activity sensor (G) having a plurality of determinable states, the sensor measuring a primarily physical parameter and delivering a signal indicative of the activity of the patient bearing the device;
means for determining the determinable states of the respective sensors;
means for identifying periodically a relative sequence of successive changes in the state of the respective sensors according to predetermined identification criteria;
means for analyzing periodically the relative sequence of successive changes in the state of the respective sensors according to predetermined analysis criteria;
means for determining a command escape interval (IECONSIG) controlling the control function of the device from the analyzed states of the sensors;
means for determining an escape interval of the activity sensor (IEG); and
means for limiting the command escape interval (IECONSIG) as a function of the escape interval of the activity sensor (IEG).
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Accused Products
Abstract
An active implantable medical device, notably a cardiac pacemaker, enslaved to at least a physiological parameter which comprises at least one effort sensor (MV) having a plurality of determinable states, for measuring a primarily physiological parameter and delivering a signal which is a function of effort exerted by a patient bearing the device and at least one activity sensor (G) having a plurality of determinable states, for measuring a primarily physical parameter and delivering a signal which is indicative of the activity of the patient bearing the device. The determinable states of the respective sensors are determined and the relative sequence of successive changes in the state of the respective sensors are identified and analyzed periodically according to predetermined criteria. A command escape interval (IECONSIG) controlling the enslaved functioning of the device is determined from the analyzed states of the sensors. The command escape interval (IECONSIG) is then limited to predetermined values as appropriate.
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Citations
14 Claims
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1. An active implantable medical device having a control function enslaved to at least one physiological parameter comprising:
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at least one effort sensor (MV) having a plurality of determinable states, the sensor measuring a primarily physiological parameter and delivering a signal which is a function of effort exerted by a patient bearing the device;
at least one activity sensor (G) having a plurality of determinable states, the sensor measuring a primarily physical parameter and delivering a signal indicative of the activity of the patient bearing the device;
means for determining the determinable states of the respective sensors;
means for identifying periodically a relative sequence of successive changes in the state of the respective sensors according to predetermined identification criteria;
means for analyzing periodically the relative sequence of successive changes in the state of the respective sensors according to predetermined analysis criteria;
means for determining a command escape interval (IECONSIG) controlling the control function of the device from the analyzed states of the sensors;
means for determining an escape interval of the activity sensor (IEG); and
means for limiting the command escape interval (IECONSIG) as a function of the escape interval of the activity sensor (IEG). - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for controlling an active implantable medical device having a control function enslaved to at least one physiological parameter comprising the steps of:
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measuring a primarily physiological parameter and delivering a signal which is a function of effort exerted by a patient bearing the device;
measuring a primarily physical parameter and delivering a signal indicative of the activity of the patient bearing the device;
determining determinable states of the respective measurements;
identifying periodically a relative sequence of successive changes in the respective states according to predetermined identification criteria;
analyzing periodically the relative sequence of successive changes in the respective states according to predetermined analysis criteria;
determining a command escape interval (IECONSIG) controlling the control function of the device from the analyzed states;
determining an escape interval of the activity sensor (IEG); and
limiting the command escape interval (IECONSIG) to predetermined values as a function of the escape interval of the activity sensor (IEG). - View Dependent Claims (8, 9, 10, 11, 12)
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13. An active implantable medical device having a control function enslaved to at least one physiological parameter comprising:
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at least one effort sensor (MV) having a plurality of determinable states, the sensor measuring a primarily physiological parameter and delivering a signal which is a function of effort exerted by a patient bearing the device;
at least one activity sensor (G) having a plurality of determinable states, the sensor measuring a primarily physical parameter and delivering a signal indicative of the activity of the patient bearing the device;
means for determining the determinable states of the respective sensors;
means for identifying periodically a relative sequence of successive changes in the state of the respective sensors according to predetermined identification criteria;
means for analyzing periodically the relative sequence of successive changes in the state of the respective sensors according to predetermined analysis criteria;
means for determining a command escape interval (IECONSIG) controlling the control function of the device from the analyzed states of the sensors; and
means for limiting the command escape interval (IECONSIG) as a function of an escape interval of the activity sensor (IEG);
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14. A method for controlling an active implantable medical device having a control function enslaved to at least one physiological parameter comprising the steps of:
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measuring a primarily physiological parameter and delivering a signal which is a function of effort exerted by a patient bearing the device;
measuring a primarily physical parameter and delivering a signal indicative of the activity of the patient bearing the device;
determining determinable states of the respective measurements;
identifying periodically a relative sequence of successive changes in the respective states according to predetermined identification criteria;
analyzing periodically the relative sequence of successive changes in the respective states according to predetermined analysis criteria;
determining a command escape interval (IECONSIG) controlling the control function of the device from the analyzed states; and
limiting the command escape interval (IECONSIG) to predetermined values as a function of an escape interval of the activity sensor (IEG);
wherein one of the determinable states comprises a rest state and limiting the command escape interval (IECONSIG) is performed by applying the limitation of the command escape interval (IECONSIG) only where the physiological parameter is in a state other than the rest state.
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Specification