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Search Results: 1 - 10 of 5606 matches for " Biomedical Engineering "
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Medical colleges summary of biomedical engineering profession
—Luzhou Medical College in the perspective of biomedical engineering profession
 [PDF]

Bangtao Liu, Min Luo, Minjun Li, Xiaoyu Kang, Chenghu Zhang
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.63035
Abstract: This paper expounds professional characteristics of biomedical engineering in our school, and analyses some problems lying in it, emphatically discusses advantages and the problems combining biomedical engineering with the medical courses in order to offer targeted solutions. It summarizes the results and problems so as to provide reference value to a new major.
ANáLISIS DE VíDEO PARA ESTIMACIóN DEL MOVIMIENTO HUMANO: UNA REVISIóN
MARTíNEZ,FABIO; GóMEZ,FRANCISCO; ROMERO,EDUARDO;
Revista Med , 2009,
Abstract: the cinematic analysis of the human march is a fundamental tool in rehabilitation medicine, because it facilitates the diagnosis, treatment, follow up and implementation of rehabilitation methods in pathologies associated with the movement. this analysis is based on the description and the quantification of the variability in the displacement of the center mass of the body and the centers of rotation of the joints, information that allows to obtain the various relations that appear to the expert in form of clinical report, or as a tool of virtual visualization, with the purpose of making an observational analysis of the march. in this article the foundations and the sequence of events that constitute a cinematic analysis of the march in medicine are reviewed, as a process that registers processes and quantifies the movement of the patient in a clinical context.
Modern Technology for Acupuncture Research: A Short Review from the Medical University of Graz  [PDF]
Lu Wang, Gerhard Litscher
Chinese Medicine (CM) , 2010, DOI: 10.4236/cm.2010.13012
Abstract: This short review article gives a brief description of the TCM Research Center Graz, especially the part of high-tech acupuncture research. A new technology for non-invasive acupuncture stimulation using violet laser (405 nm, 110 mW, 500 µm) is described. With this kind of laser it is possible to induce a so-called Deqi sensation which is very important in Chinese acupuncture. The second part of the review paper describes the new teleacupuncture which has been performed for the first time between the China Academy of Chinese Medical Sciences and the TCM Research Center Graz at the Medical University of Graz.
Transdermal drug delivery models  [PDF]
Grantham K. H. Pang, Da-Peng Qiao
Journal of Biomedical Science and Engineering (JBiSE) , 2010, DOI: 10.4236/jbise.2010.34051
Abstract: In this paper, a preliminary study based on the different models of the skin impedance is carried out. The purpose is to examine the drug delivery method through iontophoresis, which relies on active trans- portation of the charged medication agent within an electric field. It is a kind of transdermal drug delivery method, and hence the method has to handle the variability in skin characteristics of a patient. This paper carries out a simulation study based on three different skin impedance models.
Desenvolvimento de parafusos de osso bovino: método de usinagem e estudo metrológico com projetor de perfil
Haje, Davi P.;Volpon, José B.;
Acta Ortopédica Brasileira , 2006, DOI: 10.1590/S1413-78522006000200006
Abstract: screws made of bone are little studied in literature. structural, mechanical and osseointegration/ osteoinduction-related aspects are important research topics to be addressed prior to the use of in vivo bone grafts. however, the first issue that should be addressed is the machineability of bone tissues. another relevant issue is regarding the feasibility of building bone screws in pre-determined dimensions. in those researches, screws were made of cortical bone samples removed from the medial-diaphyseal portion of bovine tibiae in a standardized fashion. bone machining was performed in a horizontal lathe by using two pieces of tool: steel bits and aluminum-oxide tip-mounted grindstone, producing 22 screws. the evaluation of bone screws' dimensions was performed in a profile projector, taking 10 metal screws as reference. in general, the metrological analysis showed no significant changes within bone and metal screws groups. major dimensional problems found in both screw groups were: very high alpha angles in bone grafts and similar metal grafts presenting a body diameter in a much lower value than expected. we concluded that bone tissue is machineable and the production of screws with pre-defined dimensions was shown to be possible in the bone.
Análisis de sensibilidad por la colocación de los electrodos en la electromiografía de superficie (semg)
Ramírez,Angélica; Garzón,Diego Alexander;
Revista Facultad de Ingeniería Universidad de Antioquia , 2008,
Abstract: the surface electromyography is widely used in laboratories of movement analysis due to its easy manipulation and its noninvasive character. however, this extended use generates a variation in the protocols and produces difficult to compare results [1]. in the present study, an analysis of sensitivity for the positioning of bipolar electrodes is made on three muscles of the quadriceps: vastus lateralis (vl), vastus medialis (vm) and rectus femoris (rf). the three main factors of the study are: a. the longitudinal position of electrode, b. the orientation of electrode and c. the angle of extension of the knee. additionally, the response factors are the maxima force and the rms of the emg signal. the tests were made for maxima voluntary contraction (mvc) during an isometric force. we conclude that there are differences in the emg signal when the electrodes are in different position and orientation. the best distance for the electrodes is 22.59 ± 2.84% for the vl, 29.44 ± 1.88% for the vm and 66.28 ± 0.38% for the rf from the apex of the patella. the best orientation of the electrodes is 0ofor the vl, 70ofor the vm and -20ofor the rf.
ANáLISIS TEóRICO Y COMPUTACIONAL DE LA MARCHA NORMAL Y PATOLóGICA: UNA REVISIóN
CIFUENTES,CHRISTIAN; MARTíNEZ,FABIO; ROMERO,EDUARDO;
Revista Med , 2010,
Abstract: the human gait is the result of complex interactions between several sub-systems: neuromuscular, musculo-tendinous and osteo-articular, which work together to generate the body dynamics necessary to describe the bipedal movement. in the clinical routine, the gait analysis is the main element for identifying pathological disorders, supporting the diagnosis and facilitating a proper follow up. traditionally, this analysis aims to establish the set of patterns that describe the dynamics of the system. however, this analysis is insufficient for some movements, especially for early stages of almost every pathological movement. the development of normal and pathological models has allowed to demostrate objective differences for each of these situations. in this article we present a summary of the models that describe the dynamics of the normal and pathological human gait, inspired by the morpho-physiology of the locomotor system. furthermore, we perform an analysis of the effectiveness of the proposed models in the literature.
Average Dielectric Property Analysis of Complex Breast Tissue with Microwave Transmission Measurements
John D. Garrett,Elise C. Fear
Sensors , 2015, DOI: 10.3390/s150101199
Abstract: Prior information about the average dielectric properties of breast tissue can be implemented in microwave breast imaging techniques to improve the results. Rapidly providing this information relies on acquiring a limited number of measurements and processing these measurement with efficient algorithms. Previously, systems were developed to measure the transmission of microwave signals through breast tissue, and simplifications were applied to estimate the average properties. These methods provided reasonable estimates, but they were sensitive to multipath. In this paper, a new technique to analyze the average properties of breast tissues while addressing multipath is presented. Three steps are used to process transmission measurements. First, the effects of multipath were removed. In cases where multipath is present, multiple peaks were observed in the time domain. A Tukey window was used to time-gate a single peak and, therefore, select a single path through the breast. Second, the antenna response was deconvolved from the transmission coefficient to isolate the response from the tissue in the breast interior. The antenna response was determined through simulations. Finally, the complex permittivity was estimated using an iterative approach. This technique was validated using simulated and physical homogeneous breast models and tested with results taken from a recent patient study.
Comparing joint kinematics and center of mass acceleration as feedback for control of standing balance by functional neuromuscular stimulation
Raviraj Nataraj, Musa L Audu, Ronald J Triolo
Journal of NeuroEngineering and Rehabilitation , 2012, DOI: 10.1186/1743-0003-9-25
Abstract: In simulation, controller performance was measured according to the upper extremity effort required to stabilize a three-dimensional model of bipedal standing against a variety of postural disturbances. Three cases were investigated: proportional-derivative control based on joint kinematics alone, COM acceleration feedback alone, and combined joint kinematics and COM acceleration feedback. Additionally, pilot data was collected during external perturbations of an individual with SCI standing with functional neuromuscular stimulation (FNS), and the resulting joint kinematics and COM acceleration data was analyzed.Compared to the baseline case of maximal constant muscle excitations, the three control systems reduced the mean upper extremity loading by 51%, 43% and 56%, respectively against external force-pulse perturbations. Controller robustness was defined as the degradation in performance with increasing levels of input errors expected with clinical deployment of sensor-based feedback. At error levels typical for body-mounted inertial sensors, performance degradation due to sensor noise and placement were negligible. However, at typical tracking error levels, performance could degrade as much as 86% for joint kinematics feedback and 35% for COM acceleration feedback. Pilot data indicated that COM acceleration could be estimated with a few well-placed sensors and efficiently captures information related to movement synergies observed during perturbed bipedal standing following SCI.Overall, COM acceleration feedback may be a more feasible solution for control of standing with FNS given its superior robustness and small number of inputs required.
Reflexiones sobre bioética e ingeniería biomédica: intrínseca complementariedad
Pineda Romero,Margarita María; González Guerrero,Karolina;
Revista Latinoamericana de Bioética , 2010,
Abstract: the aim of the present article is to establish an approach to the study of the relation between bioethics and biomedical engineering. these branches of knowledge cannot be considered in isolation one from the other; on the contrary, due to the multidisciplinary character of the concepts under consideration in these fields it turns out necessary to treat them in a complementary manner. it is important to understand that professional activities of a biomedical engineer cannot ignore the fundamental principles of bioethics since the goal of his/her job is the diagnostics and treatment of living persons, which implies that he/she must have a knowledge of the basic ethical principles in order to have a high-quality and responsible performance always having in mind that his/her actions in some cases are directly related to the preservation of a patient's life.
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