Rapid shallow breathing detection for use in congestive heart failure status determination
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-005/02
A61B-005/08
출원번호
UP-0229316
(2005-09-16)
등록번호
US-7775983
(2010-09-06)
발명자
/ 주소
Zhang, Yi
Hatlestad, John D.
Dalal, Yousufali H.
Brockway, Marina
출원인 / 주소
Cardiac Pacemakers, Inc.
대리인 / 주소
Hollingsworth & Funk, LLC
인용정보
피인용 횟수 :
13인용 특허 :
104
초록▼
Systems and methods involve use of a medical device comprising sensing circuitry. One or more respiratory parameters are detected using the device. Patient baseline weight is provided, and an output signal indicative of a patient's congestive heart failure status is generated based on a change in th
Systems and methods involve use of a medical device comprising sensing circuitry. One or more respiratory parameters are detected using the device. Patient baseline weight is provided, and an output signal indicative of a patient's congestive heart failure status is generated based on a change in the one or more respiratory parameters and a change in the patient's measured weight or predicted weight relative to the patient baseline weight. The respiratory parameters may include one or more of respiration rate, relative tidal volume, an index indicative of rapid shallow breathing by the patient, an index derived by computing a respiration rate and a tidal volume for each patient breath, and an index indicative of dyspnea, for example.
대표청구항▼
What is claimed is: 1. A method, comprising: detecting one or more respiratory parameters; providing patient weight; providing patient baseline weight; and generating an output signal indicative of a patient's congestive heart failure status based on a change in the one or more respiratory paramete
What is claimed is: 1. A method, comprising: detecting one or more respiratory parameters; providing patient weight; providing patient baseline weight; and generating an output signal indicative of a patient's congestive heart failure status based on a change in the one or more respiratory parameters and a change in the patient weight relative to the patient baseline weight, wherein one of the change in the one or more respiratory parameters and the change in patient weight is used to validate the other of the change in the one or more respiratory parameters and the change in patient weight, and the generating is implemented at least in part by circuitry. 2. The method of claim 1, wherein the one or more respiratory parameters comprises respiration rate. 3. The method of claim 1, wherein the one or more respiratory parameters comprises an index indicative of rapid shallow breathing by the patient. 4. The method of claim 3, wherein the index is derived by computing a respiration rate and a tidal volume for each patient breath. 5. The method of claim 1, wherein the one or more respiratory parameters comprises an index indicative of dyspnea. 6. The method of claim 1, wherein the one or more respiratory parameters comprises an index indicative of rapid shallow breathing by the patient, the method further comprising using the index as a basis to triage or discharge the patient. 7. The method of claim 1, wherein generating the output signal comprises generating a perceivable signal indicating a need for clinician intervention or initiation, adjustment or termination of therapy delivery to the patient. 8. The method of claim 1, wherein generating the output signal comprises generating a signal for facilitating automatic initiation, adjustment or termination of therapy delivery to the patient. 9. The method of claim 1, further comprising: detecting the change in the one or more respiratory parameters; initiating a computation of a change in the patient weight; and generating the output signal in response to the change in the one or more respiratory parameters exceeding a first threshold and the computed change in the patient weight exceeding a second threshold. 10. The method of claim 9, wherein the change in the one or more respiratory parameters represents a cumulative change or slope of change in the one or more respiratory parameters. 11. The method of claim 9, further comprising updating the first and second thresholds in response to the detected change in the one or more respiratory parameters exceeding the first threshold and the computed change in the patient weight exceeding the second threshold. 12. The method of claim 1, further comprising: detecting the change in the one or more respiratory parameters relative to a first threshold; and predicting the change in patient weight based on the change in the one or more respiratory parameters. 13. The method of claim 12, wherein predicting the change in patient weight comprises: computing a change in respiration rate based on the change in the one or more respiratory parameters; and deriving coefficients based on a relationship between change in patient weight relative to change in respiration rate. 14. The method of claim 13, wherein the coefficients are derived from a linear regression of change in patient weight relative to change in respiration rate. 15. The method of claim 13, further comprising: generating a baseline relationship between change in patient weight relative to change in respiration rate for a patient; and updating the baseline relationship in response to a change in therapy delivered to the patient or change in patient condition. 16. The method of claim 1, further comprising: computing a change in respiration rate based on the change in the one or more respiratory parameters relative to a first threshold; predicting a change in patient weight based on the change in respiration rate; and generating the output signal in response to the predicted weight change exceeding a second threshold. 17. The method of claim 16, further comprising updating the first and second thresholds in response to the detected change in the one or more respiratory parameters exceeding the first threshold and the predicted weight change exceeding the second threshold. 18. The method of claim 1, wherein generating the output signal is performed at least in part by an implantable medical device. 19. The method of claim 1, wherein generating the output signal is performed at least in part by a patient-external system. 20. The method of claim 1, wherein detecting one or more respiratory parameters comprises detecting the one or more respiratory parameters from within the patient's body. 21. A system, comprising: means for detecting one or more respiratory parameters; means for providing patient weight; means for providing patient baseline weight; means for identifying a change in the patient weight relative to the patient baseline weight; and means for generating an output signal indicative of a patient's congestive heart failure status based on a change in the one or more respiratory parameters and the change in the patient weight relative to the patient baseline weight, wherein one of the change in the one or more respiratory parameters and the change in patient weight is used to validate the other of the change in the one or more respiratory parameters and the change in patient weight. 22. The system of claim 21, comprising means for predicting the change in the patient weight. 23. The system of claim 21, comprising means for indicating a need for clinician intervention or initiation, adjustment or termination of therapy delivery to the patient. 24. The system of claim 21, comprising means for facilitating automatic initiation, adjustment or termination of therapy delivery to the patient.
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이 특허에 인용된 특허 (104)
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