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We propose a new analysis method to detect phase coupling behaviour of the human gastric interdigestive pressure wave that has been acquired by a telemetric capsule-like mini-robot. The method is referred to as diagonal slice spectra, which are the Fourier transforms of the diagonal slices of the triple correlation and can detect the phase coupling and coupled components respectively. It is shown...
We applied the concept of "phase synchronization" from nonlinear dynamics to the complex relationship between intracranial pressure (ICP) and arterial blood pressure (ABP) signals. This method is based on multiresolution wavelet transform (MRWT) in which the signals are divided into different frequency bands. We examined ICP and ABP signals from anaesthetized dogs, exploring normal ICP and...
Oetrended fluctuation analysis (DFA), a fractal analysis method which is widely used in heart rate variability (HRV) studies, is used to analyze the scaling behaviour of RR interval series of preterm neonates. The average scaling behaviour, calculated using 30000 RR intervals (3-4 hours), is characterized by a scaling exponent of 1.4 plusmn 0.1 at small scales (n<20) and a smaller exponent of 1...
While biosignal analysis has been a mainstay in many medical applications for a number of decades, notably in cardiology, problems remain in the analysis of high volume data and in comparison among time series. Effective comparisons can determine if the state of a particular patient has changed significantly. These comparisons are useful in both long-term and short-term monitoring. Methods will vary...
Impulse oscillometry (IOS) is an innovative patient-friendly pulmonary testing technique which measures the respiratory system impedance (Z) by using the spectral components of pressure to flow ratio which yields resistance and reactance values at different frequencies. The high dimensionality of IOS measurement data makes the analysis of this information difficult. Artificial neural networks (ANNs)...
Quantitative classification of cardiac arrhythmia is an important tool in ICU and CCU that enables on line monitoring of the cardiac activities. Among fatal arrhythmias are atrial fibrillation (AF), ventricular tachycardia (VT), and ventricular fibrillation that require special algorithms for detection and so for direct medical actions. In this paper, a combined bispectrum and bicoherency classification...
This paper presents simulation study of the action potential waveforms of different ventricular cell types based on experimental studies of transmural electrophysiological heterogeneities in control and failing human hearts. The results show that prolonged action potential duration (APD) and APD rate-adaptation are markedly transmural heterogeneous in heart failure than those in controlled heart which...
Methods have been developed for modeling cardiac activation which accounts for detailed myocardial geometric structures derived from specific tissue samples. This modeling allows both study and analysis of the effects of cleavage planes and other structural barriers to myocardial current flow. Specialized numerical and computational procedures have been developed to enable this modeling. The results...
This paper describes an electrical model of the ventricles incorporating real geometry and motion. Cardiac geometry and motion is obtained from segmentations of multiple-slice MRI time sequences. A static heart model developed previously is deformed to match the observed geometry using a novel shape registration algorithm. The resulting electrocardiograms and body surface potential maps are compared...
We present a novel numerical scheme to accurately and efficiently simulate the spatiotemporal electrical propagation for three dimensional heart model. A meshfree particle representation of myocardial volume is first developed, upon which the electrical propagation can be obtained using the element-free Galerkin (EFG) method for the FitzHugh-Nagumo model. This method is based on a sufficient amount...
This paper presents the upgrading of biomedical engineering laboratory training at the Department of Medical Instrumentation Technology of the Technological Educational Institution of Athens (TEI-A), taking place in the framework of the "Upgrading of Undergraduate Curricula of TEI-A" project. The educational material of selected specialized laboratory sectors is totally renewed, and new...
While biomedical engineering education is thus far undergoing advancement in leading institutions worldwide, there are many areas of the globe where it is still absent. This article depicts the experience behind the development of a premier comprehensive undergraduate program in biomedical engineering in Lebanon and conceivably the Arab world. The program has been carefully planned with deliberation...
Biomedical activity is rapidly expanding. Actually, the demand for hi-tech technologies in health is in constant increase. At the Franche-Comte High Institute of Engineers (ISIFC) an engineer can acquire the knowledge and skills to carry out various tasks in biomedical engineering field including academic research, in-hospital devices maintenance or industrial development. The main advantage of the...
The Favaloro University initiated the academic path in biomedical sciences in Buenos Aires, Argentina. As a very promising area, the biomedical world offers the integration between several domains, complementing medicine with engineering topics. The profile of the graduated students proved to be very versatile, allowing their instantaneous incorporation to the competitive market in this vast field...
An innovative biomedical engineering (BME) laboratory course was developed to integrate wireless biotechnology with a hands on learning approach. In recent years the need for biomedical engineers in research and industry has increased dramatically. This requires novel strategies for training BME students in both engineering principles and clinical applications. BME students should be prepared with...
Minimising the time required for a patient to receive primary care has always been the concern of the Accidents and Emergency units. Ambulances are usually the first to arrive on the scene and to administer first aid. However, as the time that it takes to transfer the patient to the hospital increases, so does the fatality rate. In this paper, a mobile teleconsultation system is presented, based primarily...
Recent rapid growth in mobile computing technologies enables telemedicine applications to operate on mobile devices. Our focus is on the design of an integrated electrocardiogram (ECG) beat detector on a personal digital assistant (PDA) platform for the health screening process. The ECG beat detector module will be supported by the PDA version of personal health information management system (PHIMS)...
Databases of medical devices were identified via complex search strategies to discover breadth and depth of coverage. The databases could be categorised into three types: product, business and regulation. Evaluation of the databases uncovered several issues including: lack of continuity relating to the level of information provided; and little or no evidence that evaluation criteria has been applied...
In result of ECG interpretation process the diagnostic outcome summarizes all the principal information included in the raw recording. This process is investigated in this paper in data flow and data reduction aspects being of particular importance for implementation of distributed ECG interpretation in a wireless network. The detailed analysis of existing software and cardiologists societies guidelines...
An integrated information flexible system is proposed in this paper for indoor medical applications. The system is intended to provide clinicians with a portable device enabling to discover and recognize patients and easily access their electronic record in a fast and secure way for consultation or updating. Moreover the developed solution allows communication with medical equipments for wireless...
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