Active implantable medical devices, notably for pacing, resynchronization, defibrillation and/or cardioversion, having improved diagnosis of the patient's clinical status
First Claim
1. An active implantable medical device for pacing, resynchronization, defibrillation and/or cardioversion, or an active implant intended to diagnose a cardiac rhythm disorder, comprising:
- means for measuring a predominantly physiologic corporeal parameter and providing a physiologic signal representative thereof;
means for measuring a predominantly physical corporeal parameter and providing a physical signal representative thereof;
means for discriminating a patient status of a patient between rest phases and activity phases, operating in response to said physiologic signal and said physical signal,means for providing a status index corresponding to the patient status;
memory for memorizing the physiologic signal, the physical signal and the status index; and
means for analyzing the patient status, responsive to the physiologic signal, the physical signal and the status index,wherein said means for analysis comprises;
first means for providing characteristic values as a function of time for the physical signal during the activity phases of the patient, the physiologic signal during the activity phases of the patient and/or the physiologic signal during the rest phases of the patient,second means for determining a plurality of remarkable dates from the characteristic values, the plurality of remarkable dates defining endpoints of a plurality of characteristic periods and time period between two successive remarkable dates defining a characteristic period of the plurality of characteristic periods,third means for allocating a specific index of specific indices of the patient status respectively to each characteristic period of the plurality of characteristic periods, wherein the specific index is a numerical value indicating improvement, degradation, or stability of the patient status of each characteristic period with respect to the patient status of the immediately preceding characteristic period, andfourth means for combining one or more said specific indices into a composite index.
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Accused Products
Abstract
An active implantable medical device, preferably a device for pacing, resynchronization, defibrillation and/or cardioversion of a patient, that includes functionality that assists in the diagnosis of the patient'"'"'s clinical status. This devices comprises circuits (10, 12) for measuring one physiologic parameter, preferably minute ventilation (VE), and circuits (14, 16) for measuring a physical parameter, preferably acceleration (G), control logic (18) for discriminating between activity and rest phases of the patient, and analysis circuits (20-28), to process and combine these signals and memorize (store in memory) the obtained results in the form of a data history. The analysis will establish characteristics providing, for successive dates, representative values, for a given period of time, of the physical signal and physiologic signal during activity phases of the patient, and/or of the physiologic signal during rest phases. These circuits search for remarkable dates for each of the characteristics and allocate specific indices of clinical status respective to each of the periods comprised between the remarkable dates, then combined the specific thus obtained into one single composite index.
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Citations
12 Claims
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1. An active implantable medical device for pacing, resynchronization, defibrillation and/or cardioversion, or an active implant intended to diagnose a cardiac rhythm disorder, comprising:
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means for measuring a predominantly physiologic corporeal parameter and providing a physiologic signal representative thereof; means for measuring a predominantly physical corporeal parameter and providing a physical signal representative thereof; means for discriminating a patient status of a patient between rest phases and activity phases, operating in response to said physiologic signal and said physical signal, means for providing a status index corresponding to the patient status; memory for memorizing the physiologic signal, the physical signal and the status index; and means for analyzing the patient status, responsive to the physiologic signal, the physical signal and the status index, wherein said means for analysis comprises; first means for providing characteristic values as a function of time for the physical signal during the activity phases of the patient, the physiologic signal during the activity phases of the patient and/or the physiologic signal during the rest phases of the patient, second means for determining a plurality of remarkable dates from the characteristic values, the plurality of remarkable dates defining endpoints of a plurality of characteristic periods and time period between two successive remarkable dates defining a characteristic period of the plurality of characteristic periods, third means for allocating a specific index of specific indices of the patient status respectively to each characteristic period of the plurality of characteristic periods, wherein the specific index is a numerical value indicating improvement, degradation, or stability of the patient status of each characteristic period with respect to the patient status of the immediately preceding characteristic period, and fourth means for combining one or more said specific indices into a composite index. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification