Method and apparatus for determination of central aortic pressure
First Claim
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1. A method for determining central systolic pressure, comprising the steps of:
- determining a time t from a pressure wave foot to a peak in a central carotid artery;
measuring an upper limb pressure waveform with a sensor; and
using a computer program embodied on a computer readable medium to locate the wave foot in the upper limb pressure waveform and determine the corresponding pressure at time t after the wave foot;
wherein said corresponding pressure is substantially the central systolic pressure.
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Abstract
Methods for determining central systolic pressure are disclosed. A first method determines the time of peak in a measured carotid waveform and then determines the pressure in a measured radial waveform at the corresponding time. A second method utilises only a measured radial waveform. The waveform is analysed to determine a time indicative of lower body waveform and determines the pressure at this time. In each case, the determined pressure is substantially the same as the central systolic pressure.
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Citations
11 Claims
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1. A method for determining central systolic pressure, comprising the steps of:
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determining a time t from a pressure wave foot to a peak in a central carotid artery; measuring an upper limb pressure waveform with a sensor; and using a computer program embodied on a computer readable medium to locate the wave foot in the upper limb pressure waveform and determine the corresponding pressure at time t after the wave foot; wherein said corresponding pressure is substantially the central systolic pressure. - View Dependent Claims (5, 7, 9)
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2. A method for determining central systolic pressure, comprising the steps of:
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measuring an upper limb pressure waveform with a sensor; using a computer program embodied on a computer readable medium to locate a time of the start of a component of said upper limb pressure waveform attributable to lower body wave reflection by analyzing derivatives of the upper limb pressure waveform; and using a value of the upper limb pressure waveform at said time in the computer program to determine the central systolic pressure. - View Dependent Claims (3, 4, 6, 8, 10, 11)
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