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The actual interaction mechanisms of stress shock waves with renal calculi or gall bladder stones during disintegration, noninvasively, are still not understood clearly. The high-pressure shock waves create transient cavitation that is accepted as one behind the mechanisms of disintegration of those stones. The cavitation phenomenon and other associated mechanisms responsible for the disintegration...
Visual Evoked Potentials (VEP) are analyzed with the continuous wavelet transform (CWT). The modulus of the wavelet transform of the signal is calculated and represented in the time-scale domain. Based on the first-order derivative of the Gaussian function chosen as the wavelet, the modulus representation allows a clear-cut discrimination between normal and pathological cases. By processing a set...
Music and meditation are nowadays commonly used as relaxation techniques. Meditation is known to have an effect on the mental state of practitioners. It is considered to have stress-reducing capabilities. Similarly, music is believed to make a disturbed mind calm and relieved. It is used as a therapeutic agent in some countries. In this work, the authors use music and meditation as stimuli in psychophysiological...
In Brainstem Auditory Evoked Potentials (BAEPs) extraction systems, BAEP recognition by determining wave latencies I, II, III and IVV is an importantant stage for pronostic assistance. We suggest in this paper a new approach for BAEP recognition. The recognition is based on modelling BAEP using wavelet transform; latencies are then automatically measured. We show that the application of a sixth-order...
Percutaneous imaging-guided ablative therapies using thermal energy sources have received much recent attention as minimally invasive strategies for the treatment of malignant liver tumors. Especially tumor ablation using radiofrequency has been shown to be a reliable method using percutaneous image-guided techniques and promising results have been reported in early clinical investigations for the...
In this article, a programmable stimulation algorithm developed for cochlear prostheses has been described. The algorithm was based on a speech treatment system with programmable filter-bank modeling which allowed flexible speech signal processing. With its digital system, it could be adapted to any cochlear prosthetic apparatus driven by a Digital Signal Processor (DSP). The different bands of the...
This article describes a simplified 3-D robotic model of the spine during a standing to sitting movement, with the spinal geometry defined by stereoradiography. The division of the spine into rigid and mobile zones is based on an analysis of local mobility cartography. Thus the multijointed spine is viewed in terms of a succession of zones with groups of low mobility vertebrae and groups of high mobility...
This paper describes a noninvasive method to monitor wound-healing by using a digital video technique. An image processing software is used to calculate the wound area and make a planimetric measurement. Another software called colorimetric analysis software determines the black, yellow and red percentage of the wound color. All this data is stored in a database.
Commercial acrylic bone cements are supplied as two components, a polymer powder and a liquid monomer. Mixing of the two components is followed by a progressive polymerisation of the liquid monomer to yield a solid mass, a high level of heat being generated during this exothermic reaction. The exposure of bone to high temperatures has led to incidences of bone necrosis and tissue damage, ultimately...
In this paper, studies are performed on a large number of diabetic patients belonging to different levels of planar sensation loss, using foot pressure parameters, i.e., normalized peak pressure (NPP), pressure contact ratio (PCR) and their gradients, which include effects of the weight of the subject, velocity of walking and duration of high pressures in all the foot sole areas. The foot areas of...
We propose a clinically applicable computed model of the pendulum test of the leg for routine estimation of spasticity in man. The model was set up using a linear equation including morphological parameters of the leg (the mass of the led and its length), mechanical parameters (elasticity and viscosity), completed by a non-linear forcing function representing the spastic reflex-mediated torque. Parameters...
Analysis of the aggregation of erythrocytes as measured by aggregation index in blood samples obtained from patients with elevated levels of immunoglobulin G (Ig G) and immunoglobulin A (Ig A) is carried out. The aggregation index (AI) and plasma viscosity (PV) are correlated with the total protein, albumin, Ig G, Ig A and Ig M and total globulin concentrations of samples and are compared with that...
Secondary to open-heart surgery and perfusion a systemic inflammatory response (IR) develops which is noxious for the patient. It has therefore been attempted to counteract this response pharmacologically. The drugs used for this purpose are the subject of the present survey. The potential drug targets in the IR are multiple, such as for instance the kinin-kallikrein pathway, the fibrinolytic system,...
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