Method for monitoring patient using acoustic sensor
First Claim
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1. A method for monitoring the progression of the disease state of a heart failure patient comprising the steps of:
- (a) sensing a physiologic acoustic signal inside a patient'"'"'s body at a first time period;
(b) calculating a value corresponding to the energy content of a portion of the acoustic signal for the first time period;
(c) sensing the acoustic signal at a second later time period;
(d) calculating a value corresponding to the energy content of the portion of the acoustic signal for the second time period; and
(e) comparing the calculated value of the energy content of the acoustic signal for the second time period with the calculated value of the energy content of the acoustic signal for the first time period and providing an output as a function of the results of the comparison.
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Abstract
A method for monitoring the progression of the disease of a heart failure patient is provided. An implantable or other ambulatory monitor senses acoustic signals including heart and lung sounds within the patient. Significant changes in the energy content of either the heart or lung sounds is indicative of a heart failure exacerbation. This information may be used to warn the patient or healthcare providers of changes in the patient'"'"'s condition warranting attention.
1010 Citations
42 Claims
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1. A method for monitoring the progression of the disease state of a heart failure patient comprising the steps of:
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(a) sensing a physiologic acoustic signal inside a patient'"'"'s body at a first time period;
(b) calculating a value corresponding to the energy content of a portion of the acoustic signal for the first time period;
(c) sensing the acoustic signal at a second later time period;
(d) calculating a value corresponding to the energy content of the portion of the acoustic signal for the second time period; and
(e) comparing the calculated value of the energy content of the acoustic signal for the second time period with the calculated value of the energy content of the acoustic signal for the first time period and providing an output as a function of the results of the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for monitoring the progression of the disease state of a heart failure patient comprising the steps of:
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(a) sensing a physiologic acoustic signal inside a patient'"'"'s body at a first time period;
(b) identifying portions of the acoustic signal corresponding to cardiac contractions;
(c) calculating a value corresponding to the energy content of each of the cardiac contraction portions of the acoustic signal to provide a baseline heart sounds acoustic energy measure;
(d) sensing the acoustic signal at a second later time period;
(e) calculating a value corresponding to the energy content of each of the cardiac contraction portions of the acoustic signal for the second time period; and
(f) comparing the calculated value of the energy content of the cardiac contractions for the second time period with the baseline heart sounds acoustic energy measure and providing an output as a function of the results of the comparison. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for monitoring the progression of the disease state of a heart failure patient comprising the steps of:
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(a) sensing a physiologic acoustic signal inside a patient'"'"'s body at a first time period;
(b) identifying portions of the acoustic signal corresponding to the patient'"'"'s breathing;
(c) calculating a value corresponding to the energy content the acoustic signal corresponding to the patient'"'"'s breathing to provide a baseline breathing acoustic energy measure;
(d) sensing the acoustic signal at a second later time period;
(e) calculating a value corresponding to the energy content of the acoustic signal for the patient'"'"'s breathing for the second time period; and
(f) comparing the calculated value of the energy content of the acoustic signal for the patient'"'"'s breathing for the second time period with the baseline breathing acoustic energy measure and providing an output as a function of the results of the comparison. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification