METHODS AND APPARATUS FOR DETERMINING CUFF BLOOD PRESSURE
First Claim
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1. A method for determining blood pressure for a subject using a sphygmomanometer having a cuff and a pressure sensor integrated therein, comprising:
- measuring an oscillometric cuff pressure waveform of the subject using the sphygmomanometer, where the oscillometric cuff pressure waveform indicates the time evolution of the pressure inside the cuff during inflation and deflation of the cuff;
representing the measured waveform with a physical model, where the model accounts for a nonlinear relationship between a cross-sectional area of an artery and blood pressure;
determining unknowns of the physical model using the measured oscillometric cuff pressure waveform; and
determining blood pressure for the subject using the determined model.
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Abstract
A method is provided for determining blood pressure for a subject using a sphygmomanometer. The method includes: measuring an oscillometric cuff pressure waveform of the subject using the sphygmomanometer; representing the measured waveform with a physical model accounting for mechanics of the cuff, an artery and coupling between the cuff and the artery; determining the model unknowns from the measured waveform; and determining blood pressure for the subject using the determined model.
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Citations
23 Claims
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1. A method for determining blood pressure for a subject using a sphygmomanometer having a cuff and a pressure sensor integrated therein, comprising:
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measuring an oscillometric cuff pressure waveform of the subject using the sphygmomanometer, where the oscillometric cuff pressure waveform indicates the time evolution of the pressure inside the cuff during inflation and deflation of the cuff; representing the measured waveform with a physical model, where the model accounts for a nonlinear relationship between a cross-sectional area of an artery and blood pressure; determining unknowns of the physical model using the measured oscillometric cuff pressure waveform; and determining blood pressure for the subject using the determined model. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for determining blood pressure for a subject using a sphygmomanometer having a cuff and a pressure sensor integrated therein, comprising:
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measuring an oscillometric cuff pressure waveform of the subject using the sphygmomanometer, where the oscillometric cuff pressure waveform indicates the time evolution of the pressure inside the cuff during inflation and deflation of the cuff; representing the measured waveform in terms of a physical model, where the model accounts for a nonlinear relationship between a cross-sectional area of an artery and blood pressure, and a nonlinear relationship between the oscillometric cuff pressure and volume of air pumped into the cuff; determining the cross-sectional area of the artery using the physical model and the measured oscillometric cuff pressure waveform; determining parameters of the relationship between cross-sectional area of an artery and blood pressure from the determined waveform and the measured oscillometric cuff pressure waveform; and determining blood pressure for the subject using the determined waveform and the determine relationship. - View Dependent Claims (18, 19)
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20. A method for determining blood pressure for a subject using a sphygmomanometer having a cuff and a pressure sensor integrated therein, comprising:
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measuring oscillometric cuff pressure waveform of the subject using the sphygmomanometer, where the oscillometric cuff pressure waveform indicates the time evolution of the pressure inside the cuff during inflation and deflation of the cuff; representing the measured waveform in terms of a physical model, where the model accounts for a nonlinear relationship between a cross-sectional area of an artery and blood pressure, and a nonlinear relationship between the oscillometric cuff pressure and volume of air pumped into the cuff; determining the cross-sectional area of the artery using the physical model and the measured oscillometric cuff pressure waveform; determining non-parametrically the relationship between cross-sectional area of an artery and blood pressure from the determined waveform and the measured oscillometric cuff pressure waveform; and determining blood pressure for the subject using the determined waveform and the determined relationship. - View Dependent Claims (21, 22, 23)
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Specification