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KMID : 1137820210420040175
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의공학회지
2021 Volume.42 No. 4 p.175 ~ p.185
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Data Processing and Visualization Method for Retrospective Data Analysis and Research Using Patient Vital Signs
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Kim Su-Min
Yoon Ji-Young
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Abstract
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Purpose: Vital sign are used to help assess the general physical health of a person, give clues to possible diseases, and show progress toward recovery. Researchers are using vital sign data and AI(artificial intelligence) to manage a variety of diseases and predict mortality. In order to analyze vital sign data using AI, it is important to select and extract vital sign data suitable for research purposes.
Methods: We developed a method to visualize vital sign and early warning scores by processing retrospective vital sign data collected from EMR(electronic medical records) and patient monitoring devices. The vital sign data used for development were obtained using the open EMR big data MIMIC-III and the wearable patient monitoring device(CareTaker). Data processing and visualization were developed using Python. We used the development results with machine learning to process the prediction of mortality in ICU patients.
Results: We calculated NEWS(National Early Warning Score) to understand the patient's condition. Vital sign data with different measurement times and frequencies were sampled at equal time intervals, and missing data were interpolated to reconstruct data. The normal and abnormal states of vital sign were visualized as color-coded graphs. Mortality prediction result with processed data and machine learning was AUC of 0.892.
Conclusion: This visualization method will help researchers to easily understand a patient's vital sign status over time and extract the necessary data.
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KEYWORD
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Vital sign, Electronic medical records, Visualization, Retrospective medical data analysis, Patients monitoring system, Machine learning
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