Abstract:
:Many studies on the physiology of the cardiovascular system revealed that nonlinear chaotic dynamics govern the generation of the heart rate signal. This is also valid for the fetal heart rate (FHR) variability, where however the variability is affected by many more factors and is significantly more complicated than for the adult case. Recently an adaptive wavelet denoising method for the Doppler ultrasound FHR recordings has been introduced. In this paper the performance and reliability of that method is confirmed by the observation that for the wavelet denoised FHR signal, a deterministic nonlinear structure, which was concealed by the noise, becomes apparent. It provides strong evidence that the denoising process removes actual noise components and can therefore be utilized for the improvement of the signal quality. Hence by observing after denoising a significant improvement of the 'chaoticity' of the FHR signal we obtain strong evidence for the reliability and efficiency of the wavelet based denoising method. The estimation of the chaoticity of the FHR signal before and after the denoising is approached with three nonlinear analysis methods. First, the rescaled scale analysis (RSA) technique reveals that the denoising process increases the Hurst exponent parameter as happens when additive noise is removed from a chaotic signal. Second, the nonlinear prediction error evaluated with radial basis function (RBF) prediction networks is significantly lower at the denoised signal. The significant gain in predictability can be attributed to the drastic reduction of the additive noise from the signal by the denoising algorithm. Moreover, the evaluation of the correlation coefficient between actual and neural network predicted values as a function of the prediction time displays characteristics of chaos only for the denoised signal. Third, a chaotic attractor, reconstructed with the embedding dimension technique, becomes evident for the denoised signal, while it is completely obscured for the original signals. The correlation dimension of the reconstructed attractor for the denoised signal tends to reach a value independent of the embedding dimension, a sign of deterministic chaotic signal. In contrast for the original signal the correlation dimension increases steadily with the embedding dimension, a fact that indicates strong contribution of noise.
journal_name
Int J Med Informjournal_title
International journal of medical informaticsauthors
Papadimitriou S,Bezerianos Adoi
10.1016/s1386-5056(98)00102-6subject
Has Abstractpub_date
1999-01-01 00:00:00pages
43-60issue
1eissn
1386-5056issn
1872-8243pii
S1386-5056(98)00102-6journal_volume
53pub_type
杂志文章abstract:OBJECTIVE:Clinical problems in the Electronic Health Record that are encoded in SNOMED CT can be translated into ICD-10-CM codes through the NLM's SNOMED CT to ICD-10-CM map (NLM Map). This study evaluates the potential benefits of using the map-generated codes to assist manual ICD-10-CM coding. METHODS:De-identified ...
journal_title:International journal of medical informatics
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.ijmedinf.2019.03.002
更新日期:2019-06-01 00:00:00
abstract:BACKGROUND:Pre-existing wireless local area network (WLAN) infrastructures enable the implementation of a real-time location system (RTLS) in the clinical setting. RTLS enable clinics to capture and process patient position data and link it with clinical data. The improvements in workflow and treatment brought about by...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2013.10.001
更新日期:2014-01-01 00:00:00
abstract::The specialized university curriculum for medical informatics (MI) at the University of Heidelberg/School of Technology Heilbronn is one of the oldest educational approaches in the field of MI and has been successful now for 25 years with about 1000 graduates (Diplom-Informatikerin der Medizin or Diplom-Informatiker d...
journal_title:International journal of medical informatics
pub_type: 历史文章,杂志文章
doi:10.1016/s1386-5056(98)00048-3
更新日期:1998-06-01 00:00:00
abstract:BACKGROUND:The current systems of reporting waiting time to patients in public emergency departments (EDs) has largely relied on rolling average or median estimators which have limited accuracy. This study proposes to use machine learning (ML) algorithms that significantly improve waiting time forecasts. METHODS:By im...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2020.104303
更新日期:2021-01-01 00:00:00
abstract:UNLABELLED:Health care is moving toward a team effort, with patients as partners. This requires effective communication between physicians and patients, who have different understandings of health and illness. These understandings in turn guide their decisions about management of health and illness. With the introducti...
journal_title:International journal of medical informatics
pub_type: 临床试验,杂志文章
doi:10.1016/s1386-5056(98)00111-7
更新日期:1998-08-01 00:00:00
abstract:PURPOSE:Home-polysomnography (HPSG) has been proposed as a cost-effective alternative for obstructive sleep apnea (OSA) diagnosis. We assessed, in a feasibility study, whether telematic transmission using the Dream® and Sleepbox® technologies was associated with low HPSG failure rate. METHODS:Patients referred by ches...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2013.02.008
更新日期:2013-08-01 00:00:00
abstract:BACKGROUND:Falls are a serious health problem in old adults especially in nursing home residents and hospitalized patients. To prevent elderly from falling, sensors have been increasingly used in intramural care settings. However, there is no clear overview of the current used technologies and their results in fall pre...
journal_title:International journal of medical informatics
pub_type: 杂志文章,评审
doi:10.1016/j.ijmedinf.2013.06.001
更新日期:2013-09-01 00:00:00
abstract:BACKGROUND:With increasing computerization of nursing records in Japan, standardization of nursing terminology is becoming imperative. Although some efforts have been made to formalize description of nursing practice in Japan with the International Classification of Nursing Practice (ICNP), lack of effective descriptio...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2006.02.006
更新日期:2007-01-01 00:00:00
abstract:BACKGROUND:Use of routine HIV programme data for surveillance is often limited due to inaccuracies associated with patient misclassification which can be addressed by unique patient identification.We assessed the feasibility and acceptability of integrating an iris recognition biometric identification system into routi...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2019.104006
更新日期:2020-01-01 00:00:00
abstract:OBJECTIVE:To introduce a new concept of medical dashboard system called BESTBoard. Such a system was implemented in all wards in a tertiary academic hospital to explore the development process, core designs, functions, usability and feasibility. METHODS:The task-force team made user interface designs for 6 months base...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2016.10.001
更新日期:2017-01-01 00:00:00
abstract:PURPOSE:Collecting and analyzing findings constitute the basis of medical activity. Computer assisted medical activity raises the problem of modelling findings. We propose a unified representation of findings integrating the representations of findings in the GAMUTS in Radiology [M.M. Reeder, B. Felson, GAMUTS in radio...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2007.11.003
更新日期:2008-09-01 00:00:00
abstract:OBJECTIVES:We aimed to provide an up-to-date contemporary bibliometric view of the telemedicine and telehealth literature and a longitudinal analysis of changes in content themes. METHODS:Software tools were used to extract and process MEDLINE entries. Frequencies of papers by year of publication and outlet were calcu...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2014.07.001
更新日期:2014-10-01 00:00:00
abstract::The goal of the German project "Standardization of Communication between Information Systems in Physician Offices and Hospitals using XML" (aka SCIPHOX) in its first phase is to provide information exchange based on the Extended Markup Language XML between Hospital Information Systems (HIS) and Physician Office System...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/s1386-5056(03)00036-4
更新日期:2003-07-01 00:00:00
abstract:BACKGROUND:There are very few studies reporting the impact of providing intravenous (IV) preparation information on quality use of antimicrobials, particularly regarding their reconstitution and dilution. Therefore, to improve these processes in IV antimicrobial administration, an IV preparation information system (IPI...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2016.07.005
更新日期:2016-10-01 00:00:00
abstract::Nonlinear analysis techniques are necessary to understand the complexity of the EMG. The purpose of the present study was to determine the fractal dimension of surface EMG obtained from the biceps brachii of normal subjects during isokinetic flexion-extension of the arm. The measurements were obtained with different l...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/s1386-5056(97)00029-4
更新日期:1997-07-01 00:00:00
abstract::Telehealth refers to the integration of information, telecommunication, human-machine interface technologies and health technologies to deliver health care, to promote the heath status of the people and to create health. The Malaysian Telehealth Application will, on completion, provide every resident of the country an...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2003.11.023
更新日期:2004-03-31 00:00:00
abstract:OBJECTIVES:To investigate (1) Finnish pharmacy customers' familiarity with My Kanta, the national online service for viewing electronic prescriptions (ePrescriptions), (2) how commonly My Kanta is used, (3) who the typical users are, and (4) users' experiences of the usability of My Kanta. METHOD:A survey was conducte...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2016.10.014
更新日期:2017-01-01 00:00:00
abstract:BACKGROUND:In an era of short inpatient stays, residents may overlook relevant elements of the differential diagnosis as they try to evaluate and treat patients. However, if a resident's first principal diagnosis is wrong, the patient's appropriate evaluation and treatment may take longer, cost more, and lead to worse ...
journal_title:International journal of medical informatics
pub_type: 杂志文章,评审
doi:10.1016/j.ijmedinf.2010.09.004
更新日期:2010-11-01 00:00:00
abstract:OBJECTIVE:Modern machine learning-based modeling methods are increasingly applied to clinical problems. One such application is in variable selection methods for predictive modeling. However, there is limited research comparing the performance of classic and modern for variable selection in clinical datasets. MATERIAL...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2018.05.006
更新日期:2018-08-01 00:00:00
abstract:OBJECTIVES:To describe the range of patients' beliefs, attitudes, expectations, and experiences of remote monitoring for chronic conditions across different healthcare contexts and populations. DESIGN:We searched MEDLINE, Embase, PsychINFO, and CINAHL, Google Scholar, and reference lists of related studies through to ...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2019.01.013
更新日期:2019-04-01 00:00:00
abstract::The success of treatment of patients with cancer depends on establishing an accurate diagnosis. To this end, we have built a system called GEMS (gene expression model selector) for the automated development and evaluation of high-quality cancer diagnostic models and biomarker discovery from microarray gene expression ...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2005.05.002
更新日期:2005-08-01 00:00:00
abstract:BACKGROUND:Chronic diseases management outside expensive hospital settings has become a major target for governments, funders and healthcare service providers. It is well known that chronic diseases such as Type 2 Diabetes (T2D) do not occur in isolation, and has a shared aetiology common to many other diseases and dis...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2018.04.001
更新日期:2018-07-01 00:00:00
abstract:BACKGROUND:Electronic Consultation (e-consults) can provide improved access, enhance patient and provider satisfaction, and reduce beneficiary travel expenses. We explored how e-consults were implemented across three specialty areas, diabetes (Diab), gastroenterology (GI), and neurosurgery (Neuro), at two Veterans Affa...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2017.09.005
更新日期:2017-12-01 00:00:00
abstract:PURPOSE:The speed and high potential impact of avian influenza's (AI) on local bird populations, poultry economies and human health make timely and coordinated characterization, assessment and response to possible threats essential. To collaborate effectively, stakeholders (public health, medical, veterinary, and agric...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2008.06.015
更新日期:2009-03-01 00:00:00
abstract:INTRODUCTION:This article describes the evaluation of a prototype speech-input interface to an anaesthesia patient record, conducted in a full-scale anaesthesia simulator involving six doctor-nurse anaesthetist teams. OBJECTIVE:The aims of the experiment were, first, to assess the potential advantages and disadvantage...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2007.08.007
更新日期:2008-07-01 00:00:00
abstract::We describe the Security Plan for the 'MyAngelWeb' service. The different actors involved in the service are subject to different security procedures. The core of the security system is implemented at the host site by means of a DBMS and standard Information Technology tools. Hardware requirements for sustainable secu...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:
更新日期:2000-11-01 00:00:00
abstract:OBJECTIVE:To identify factors that can enhance the use of e-consultation in primary care. We investigated the barriers, demands and motivations regarding e-consultation among patients with no e-consultation experience (non-users). METHODS:We used an online survey to gather data. Via online banners on 26 different webs...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2009.06.002
更新日期:2009-10-01 00:00:00
abstract:INTRODUCTION:Appropriate knowledge, correct information, and relevant data are vital in medical diagnosis and treatment systems. Knowledge Management (KM) through its tools/techniques provides a pertinent framework for decision-making in healthcare systems. The objective of this study was to identify and prioritize the...
journal_title:International journal of medical informatics
pub_type: 杂志文章
doi:10.1016/j.ijmedinf.2017.10.012
更新日期:2017-12-01 00:00:00
abstract:INTRODUCTION:Unplanned 30-day hospital readmission account for roughly $17 billion in annual Medicare spending. Many factors contribute to unplanned hospital readmissions and multiple models have been developed over the years to predict them. Most researchers have used insurance claims or administrative data to train a...
journal_title:International journal of medical informatics
pub_type: 杂志文章,meta分析,多中心研究
doi:10.1016/j.ijmedinf.2015.09.003
更新日期:2015-12-01 00:00:00
abstract::Technology and equipment are often identified as contributors to adverse medical events, however technology is seldom the focal point of investigation as a source of medical error or adverse event. It is often seen as both a means of reducing error (e.g., automated drug dispensing machines) or as a major contributing ...
journal_title:International journal of medical informatics
pub_type: 杂志文章,评审
doi:10.1016/j.ijmedinf.2006.05.046
更新日期:2007-06-01 00:00:00