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Adaptive online monitoring for ICU patients by combining just-in-time learning and principal component analysis

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Abstract

Offline general-type models are widely used for patients’ monitoring in intensive care units (ICUs), which are developed by using past collected datasets consisting of thousands of patients. However, these models may fail to adapt to the changing states of ICU patients. Thus, to be more robust and effective, the monitoring models should be adaptable to individual patients. A novel combination of just-in-time learning (JITL) and principal component analysis (PCA), referred to learning-type PCA (L-PCA), was proposed for adaptive online monitoring of patients in ICUs. JITL was used to gather the most relevant data samples for adaptive modeling of complex physiological processes. PCA was used to build an online individual-type model and calculate monitoring statistics, and then to judge whether the patient’s status is normal or not. The adaptability of L-PCA lies in the usage of individual data and the continuous updating of the training dataset. Twelve subjects were selected from the Physiobank’s Multi-parameter Intelligent Monitoring for Intensive Care II (MIMIC II) database, and five vital signs of each subject were chosen. The proposed method was compared with the traditional PCA and fast moving-window PCA (Fast MWPCA). The experimental results demonstrated that the fault detection rates respectively increased by 20 % and 47 % compared with PCA and Fast MWPCA. L-PCA is first introduced into ICU patients monitoring and achieves the best monitoring performance in terms of adaptability to changes in patient status and sensitivity for abnormality detection.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (61374099), the Program for New Century Excellent Talents in University (NCET-13-0652), and Fundamental Research Funds for the Central Universities of China (YS1404).

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  1. College of Information Science and Technology, Beijing University of Chemical Technology, Mail Box 4, 15# Beisanhuan East Road, Beijing, 100029, China

    Xuejian Li & Youqing Wang

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  1. Xuejian Li
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Correspondence to Youqing Wang.

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Li, X., Wang, Y. Adaptive online monitoring for ICU patients by combining just-in-time learning and principal component analysis. J Clin Monit Comput 30, 807–820 (2016). https://doi.org/10.1007/s10877-015-9778-4

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  • DOI: https://doi.org/10.1007/s10877-015-9778-4

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