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    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/2048


    Title: Utilizing Pulse-Derived Heart Rate Parameter to Estimate the Risk of Iodinated Contrast Medium under Computer Tomography Examination
    Authors: SHI-CHUNGYANG;SHING-HONG LIU;YOU-CYUAN SU;KANG-MING CHANG
    Contributors: Lin-Shin Hospital
    Keywords: computer tomography (CT);iodinated contrast medium;cumulated heart rate variation;risk indicator
    Date: 2006-07
    Issue Date: 2009-10-13 14:57:20 (UTC+8)
    Publisher: Asia University
    Abstract: Intravenous iodinated contrast medium (ICM), an important medium to enhance computer
    tomography (CT) examination images, may cause palpitation, emesis, stress phenomena, and even
    death to patients. The purpose of this study is to develop a real-time risk monitoring system for patients
    under CT examination. Thirty eight patients were selected. The risk monitoring system was based on
    the heart rate variation. To obtain the heart rate information, the pulse wave data during ICM injection
    were measured and followed by using moving average filter twice and peak detection algorithms.
    Patients were divided into two groups based on their discomfort index. There are statistical
    differences between the two groups in heart rate derived parameters after ICM injection, especially in
    the cumulated heart rate deviation (CHRD). The CHRD increases steadily after ICM injection, and
    patients with higher discomfort index have higher CHRDs. CHRD is an effective parameter of an early
    warning indicator within two minutes after ICM injection (p<0.003**). However, the current medical
    procedure takes nearly thirty minutes to decide whether the patients are extremely uncomfortable and
    need further medical treatments.
    Relation: Asian Journal of Health and Information Sciences 1(2):237-245
    Appears in Collections:[Asian Journal of Health and Information Sciences] v.1 n.2

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