ESTIMATION OF SYSTEMIC VASCULAR RESISTANCE AND CARDIAC OUTPUT USING ARTERIAL PULSE OXIMETRY WAVEFORMS

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专利权人:

Albert Maarek

发明人:

Albert Maarek

申请号：

US13991694

公开号：

US20130324814A1

申请日:

2011.12.06

申请国别(地区):

US

年份:

2013

代理人:

摘要：

The invention relates to a method to estimate sytemic vascular resistance (SVR) and cardiac output (CO) from a pulse oximeter (photoplethysmography, PTG), comprising the steps of generating arterial blood pulse wave forms having first and second peaks, generating a Fast Fourier Transform and calculating the ratio of the height of the second peak (B) to the first peak (A) across the entire measurement using the equation FFTRI to estimate SVR, and the equation CO=(SR/FFTRI)×80 to estimate CO, where SR=S2/S1 and wherein SI and S2 are the areas under the whole PTG wave and the part in diastolic phase, respectively.∑n=2NFFT2(fn)/∑n=1NFFT2(fn).

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