Method and system for interpreting hemodynamic data incorporating patient posture information
First Claim
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1. A medical device system comprising:
- means for acquiring a hemodynamic data signal from a patient;
a posture sensor adapted to generate a posture signal;
means for identifying one of at least two patient postures from the posture signal at a given point in time;
means for categorizing the acquired hemodynamic data signal according to the identified posture; and
means for storing the categorized hemodynamic data, whereby the stored categorized hemodynamic data facilitates interpretation of the stored hemodynamic data.
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Abstract
Systems and methods for improving hemodynamic data interpretation by accounting for the effects of patient posture is disclosed. In certain embodiments, a posture signal is acquired and used to categorize hemodynamic data according to posture to facilitate distinguishing posture-related changes in acquired hemodynamic data from those due to pathophysiologic changes. Posture information may be used to normalize data acquired in various postures to facilitate interpretation of such data. Baseline measurements of hemodynamic data acquired in various postures may also be used to subsequently detect changes in patient posture without the need for an implanted posture sensor.
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Citations
20 Claims
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1. A medical device system comprising:
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means for acquiring a hemodynamic data signal from a patient;
a posture sensor adapted to generate a posture signal;
means for identifying one of at least two patient postures from the posture signal at a given point in time;
means for categorizing the acquired hemodynamic data signal according to the identified posture; and
means for storing the categorized hemodynamic data, whereby the stored categorized hemodynamic data facilitates interpretation of the stored hemodynamic data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of interpreting hemodynamic data, the method comprising:
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acquiring clinical hemodynamic data from a patient positioned in at least two different known postures to establish a baseline hemodynamic profile for each posture;
establishing posture detection criteria based on the baseline hemodynamic profiles for each of the different known postures;
acquiring ambulatory hemodynamic data over time;
applying the posture detection criteria to the acquired ambulatory hemodynamic data to identify patient posture associated with the acquired ambulatory hemodynamic data; and
accounting for changes in patient posture in the interpretation of the acquired ambulatory hemodynamic data. - View Dependent Claims (12, 13, 14, 15)
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16. A computer-readable medium comprising instructions that cause a programmable processor to:
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acquire a hemodynamic pressure signal as a function of time;
detect a change in the acquired hemodynamic pressure signal;
associate the change in the hemodynamic pressure signal with a change in patient posture;
store data about the hemodynamic pressure signal and patient posture; and
account for the effects of patient posture in the storage of hemodynamic pressure signal. - View Dependent Claims (17, 18, 19, 20)
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Specification