Unsupervised anomaly detection in peripheral venous pressure signals with hidden Markov models
Unsupervised anomaly detection in peripheral venous pressure signals with hidden Markov models
复制标题
使用隐马尔可夫模型进行外周静脉压力信号的无监督异常检测
DOI:
10.1016/j.bspc.2020.102126
复制
发表时间:
2020
影响因子:
5.1
通讯作者:
Jensen, Morten O.
中科院分区:
文献类型:
--
作者:
Hayat, Md Abul;Wu, Jingxian;Bonasso, Patrick C.;Sexton, Kevin W.;Jensen, Hanna K.;Dassinger, Melvin S.;Jensen, Morten O.
This paper proposes an automatic anomaly detection and removal algorithm for peripheral venous pressure (PVP) signals, which can be used to predict intravascular volume loss in humans. PVP signal collection is a minimally invasive procedure that can be performed by using a standard peripheral intravenous (PIV) catheter and a commercial pressure-monitoring transducer. PVP signals are highly susceptible to motion and noise artifacts such as patient movements or unintended manipulation of PIV lines. Anomalies in PVP signals can corrupt useful information and seriously affect the integrity of PVP signal analysis. We propose to detect and remove such anomalies by exploiting the properties of PVP signals. Specifically, a dynamic linear model (DLM) with a Kalman filter is used to track and predict the time-domain evolution of PVP signals. The prediction residuals of the Kalman filter are then modeled with a hidden Markov model (HMM), with the normal and anomalous status of the signal modeled by using binary states of a hidden Markov chain. The HMM parameters along with the hidden states are iteratively estimated by using an unsupervised learning algorithm with a modified Baum–Welch method. The anomaly detection algorithm is applied to clinical data from a cohort of 24 pediatric patients with hypertrophic pyloric stenosis. Experimental results demonstrate that the proposed unsupervised anomaly detection algorithm can efficiently remove anomalies in PVP signals without the need of a training phase. The algorithm can also be applied to other time series signals, such as Electrocardiography (ECG) and Photoplethysmogram (PPG) signals.
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影响因子:
0.9
作者:
Hadimioglu, N;Ertug, Z;Demirbas, A
通讯作者:
Demirbas, A
影响因子:
38.9
作者:
Desjardins, R;Denault, AY;Martineau, R
通讯作者:
Martineau, R
影响因子:
6.7
作者:
N. Hoftman;M. Braunfeld;Gil D. Hoftman;A. Mahajan
通讯作者:
A. Mahajan
DOI:
10.1111/j.2517-6161.1977.tb01600.x
发表时间:
1977-01-01
期刊:
JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES B-METHODOLOGICAL
影响因子:
--
作者:
DEMPSTER, AP;LAIRD, NM;RUBIN, DB
通讯作者:
RUBIN, DB
影响因子:
5.2
作者:
P. Bonasso;K. Sexton;A. Hayat;A. Al;Jingxian Wu;H. Jensen;M. Jensen;Samuel D. Smith;Jeffrey M. Burford;M. Dassinger
通讯作者:
M. Dassinger