Pulse Contour Method And Apparatus For Continuous Assessment Of A Cardiovascular Parameter

  • Published: May 18, 2007
  • Earliest Priority: Apr 13 2005
  • Family: 23
  • Cited Works: 3
  • Cited by: 0
  • Cites: 0
  • Additional Info: Cited Works Full text
Abstract

A cardiovascular parameter such as cardiac output is estimated from a current pressure waveform data set without needing to directly measure blood flow or arterial compliance. The general shape of an input flow waveform over one beat-to-beat cycle is assumed (or computed), and then the parameters of a flow-to-pressure model, if not pre-determined, are determined using system identification techniques. In one embodiment, the parameters thus determined are used to estimate a current peripheral resistance, which is used not only to compute an estimate of the cardiovascular parameter, but also to adjust the shape of the input flow waveform assumed during at least one subsequent beat-to-beat cycle. Another embodiment does not require computation of the peripheral resistance and still another embodiment computes a flow estimate from an optimized identification of the parameters defining the assumed input flow waveform.


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Document History
  • Publication: May 18, 2007
  • Application: Apr 12, 2006
    WO US 2006/0013844 W
  • Priority: Jul 11, 2005
    US US 17899905 A
  • Priority: Apr 13, 2005
    US US 67076705 P

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