Apparatus and method for determining a physiological parameter
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United States of America Patent
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Issued Date -
N/A
app pub date -
Feb 5, 2009
filing date -
Feb 7, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An apparatus for determining a physiological parameter of a patient, such as cardiac output, comprises a sensor device providing readings of a blood variable, memory means storing the readings as a curve over time, evaluation means determining a mean value from the curve and determining the physiological parameter using the mean value is provided. The evaluation means determine a spectral density of the curve and/or a variance. The evaluation means also determine at least one model parameter representing an effective value of a heart beat using the mean value and the spectral density and/or variance. The effective value is selected from an effective amplitude of the heart beat, an effective duration of the heart beat and an effective area under the heart beat. The physiological parameter is determined using at least one of the model parameters.
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Patent Citation Ranking
- 15 Citation Count
- A61B Class
- 26.84 % this patent is cited more than
- 16 Age