MGI MEDICAL
"OVERCOMING THE LIMITATIONS OF
CONVENTIONAL HEMODYNAMIIC MONITORING"
CONVENTIONAL HEMODYNAMIIC MONITORING"
Stability and Reproducibility
Stability and Reproducibility:
Peripheral Pulse Volume measurements were made with and without digital enhancement in healthy male
subjects (n=8, 26±4y) and repeated in 30 minutes. Without averaging, the
reproducibility was poor, with a variability of 19.9±4.5% between measurements,
and a re-measurement correlation of only r=0.17. Selective averaging resulted
in improved reproducibility with the variability reduced to 5.4±2.1%
(p<0.01), as well as increased re-measurement correlation (r=0.95). This
degree of variability is comparable to that seen with common invasive and
non-invasive measurements of cardiac function (such as thermodilution cardiac
output and Doppler flow velocity).
