| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method corresponding the necessity of calibration of measurement data based on reference which is acquired by additional and non-continuous measurement, and dispensing with the detection of a dicrotic notch. <P>SOLUTION: An apparatus for determining at least one physiological parameter of a patient, such as cardiac output, includes: a sensor device providing the measured value of a blood variable of the patient; a memory means storing the measured value as a curve over time (t); and an evaluation means determining an average value, based on the curve, and determining the at least one physiological parameter using the average value. The evaluation means determine a spectral density of the curve and/or a variance of the variable. The evaluation means also determine at least one model parameter representing an effective value of a heart beat using the average 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. <P>COPYRIGHT: (C)2009,JPO&INPIT |
