The Research of Photoplethysmography Morphology: Distincting Preeclampsia with Hierarchical Area Ratio

摘要

The variations of photoplethysmography (PPG) morphology for the pregnancies with preeclampsia (PE) were studied in this paper. PPG data from 16 hypertensive pregnancies with PE and 26 normotensive pregnancies were acquired by the standard medical monitor. A novel hierarchical area ratio (HAR) parameter was invented to segment and quantitate the descending domain of a pulse based on the data acquired. The algorithm and features of HAR are fully explained and discussed in the paper. A rough PE distinction based on the statistics of HAR calculated from the original PPG signals was conducted with the precision of 72.7%, sensitivity of 100%, specificity of 76.9% and accuracy of 85.7%. The HAR we proposed in the paper showed favorable prospects in the quick distinction of PE.