×

Method for determination of cardiac output

  • US 8,679,025 B2
  • Filed: 08/03/2007
  • Issued: 03/25/2014
  • Est. Priority Date: 08/31/2006
  • Status: Active Grant
First Claim
Patent Images

1. A method for determination of cardiac output from a recording of an arterial pressure waveform, the method comprising the following steps:

  • a) measuring the patient'"'"'s peripheral arterial pressure relative to time and using a processor to estimate a central pressure waveform (CPW) from the patient'"'"'s peripheral arterial pressure;

    b) estimating, using the processor, from the CPW, forward Pressure pulse height (Pf), flow waveform and Pulse Wave Velocity (PWV) in the ascending aorta;

    c) calculating a peak velocity fluctuation V in the ascending aorta using the following Water Hammer formula;

    V=Pf/(ρ

    * PWV), where ρ

    is the density of blood;

    d) calibrating an aortic flow waveform from the estimated flow waveform using V; and

    e) calculating the patient'"'"'s cardiac output from the calibrated aortic flow waveform.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×