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US 8,282,569 B2Granted
Method and apparatus for determining ejection fraction
AssigneeBoard of Trustees of Michigan State University
InventorRamakrishna Mukkamala
Life of this patent
Estimating the term…
Abstract
A method is provided for determining ejection fraction. The method includes: measuring a physiologic signal indicative of blood pressure; analyzing the physiologic signal at more than one time instance so as to extract information present in its temporal variations; and determining ejection fraction based in part on the extracted information.
Claims57
A method for determining ejection fraction comprising:
- measuring a blood pressure signal of a patient;
- defining a circulatory model for predicting the blood pressure signal;
- estimating parameters of the circulatory model only from the blood pressure signal;
- and
- determining ejection fraction only from the estimated model parameters and the blood pressure signal.
2 more elements
A method for determining ejection fraction comprising steps of:
- measuring a blood pressure signal of a patient;
- defining a circulatory model for predicting the blood pressure signal;
- estimating parameters of the circulatory model, to within a proportionality constant, using only the blood pressure signal;
- and
- computing absolute ejection fraction only from the estimated proportional model parameters and the blood pressure signal through cancellation of the proportionality constant.
2 more elements
Dependencies are inferred from the claim text.