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Pulsed electric field (PEF) application development substantially affected the development of research process including controlling cell functions by using pulses of electrical fields to create pores through a cellular membrane causes cell lysis and apoptosis commonly known as electroporation or electrofusion. Here we demonstrate the influence of the PEF on the threshold area (TA) of human cervical...
Rotary blood pumps are increasingly used for supporting blood circulation in heart failure patients. For the simulation of an abstract model of a cardiovascular system, a computer simulation which is a lumped parameter model can be used. Computer simulations are essential in mathematical modeling to estimate the hemodynamic parameters. In this research, a computer model is implemented to study the...
Microcontact printing (μCP) has been developed about 17 years ago and it is an outstanding surface patterning technique in micron scale and, even in nanoscale. Surface science communities like engineers and biologists have been promoting attention in μCP; therefore they have been rich in improvement to the μCP process itself. However, in order to aim at minimizing some drawbacks of μCP such as a parameter...
In the postural analysis, body sway parameters have been used to assess the steadiness of posturography in standing subject. The aim of this study was to compare correlations among ten different body sway parameters. We hypothesized that stronger correlations would exist in our system as corresponding to the conventional force plate method. The calibrated gyroscope sensor was attached to the subjects...
This study presents the hemodialysis unit device that can effectively separate waste urea from the human blood. This device is composed of donor and acceptor channels separated by a membrane. The mixture of albumin, urea, and glucose used to replace simple human blood is fractionated by different particle sizes and diffusion distances across the cross section of the channels. In this study, FEM simulation...
The characteristics of hearing aids should be determined and regulated to ensure patient safety and to optimize the performance of the hearing aids. The objectives of this work were to design and develop a hearing aid measurement system to obtain the performance characteristics of the hearing aids. The implementation of this work is based on the method recommended in the International Electrotechnical...
This paper presents a biomechatronic approach to the design and fabrication of an artificial arm, focusing on designing artificial shoulder, biceps, wrist and hand. The proposed design provides a novel tool towards upper limb amputee rehabilitation process. Detail 3D designs of the artificial arm are described including an elbow powered by a car's power window motor, DC motor powered wrist and a string...
Background EEG power effects of a cumulative dose of alcohol were investigated as subjects drank three glasses of alcoholic, 1 h apart. Subjects completed a task battery composed of digit span tests, 3 min each of eyes-open and eyes-closed resting EEG, and two blocks of an auditory N-back working memory task for measuring brain function of different segmental features in monosyllabic Thai words. The...
We have researched to control microbubbles in blood vessel by use of the acoustic radiation force for efficient and lower adverse effects medical treatments. However, behavior of microbubbles under the ultrasound exposure is complicated because of many kinds of parameters. In addition blood vessel network in human body is not simple. From these reasons, it is important to estimate emission condition...
Polymers and polymer composites are one of the most interested biomaterials to replace the using of metals and ceramics. The main advantages of the polymer are that they are easier to custom made and they are bioresorbable. Their mechanical properties are unmatched when considered to replace metals or ceramics. A photocurable poly(lactic acid) (PLA) resin was developed in our laboratory for use as...
Conductance catheterisation can be used to measure intraventicular volume during the cardiac cycle in continuous real time. However, for pressure-volume loop analysis in cardiology, the conductance catheterisation needs more to be developed. This paper presents use of a microelectronic pressure sensor to develop the conductance catheterisation. Results show how possible to use the developed conductance...
Medical image compression is necessary to store the huge database in Medical Centres and medical data transfer for the purpose of diagnosis. This paper attempts to improve the higher peak signal to noise ratio (PSNR) by using the system error compensation (SEC) method. The SEC design is based on quantization and curvelet transform (CT) decomposes the system error (E) to six scales. Only the scale...
This paper focuses on developing a novel approach for measuring body joint angles, mainly the knee angles, for surface electrical stimulator system. In this work, we only focus on the sensing mechanism for measuring the knee joint angle using wearable sensors. Our system consists of multiple flex-sensors mounted on a supportive cloth and microelectromechanical systems (MEMS) vibratory gyroscope. In...
It is demonstrated that cell culture can be printed into flexible polymer substrates for bio-sensor making by flexographic, utilizing a PDMS stamp. And addition multiple micro-scale fine solid line was successfully printed as fundamental work toward development of micron scale and low cost mass production of UHF passive RFID sensor for biomedical such monitoring the movement of healing limbs, to warn...
This paper presents an algorithm in reversible watermarking or lossless data hiding, the application associated with the quick response codes (or call QR codes) and the biomedical images. QR code is random patterns, looks like random noise which can be commonly found on the webpages. We can use the smartphone camera to capture the QR code at the webpage, and then the hyperlink corresponding to the...
Immersive virtual environment in multiple large flat-screened influences simulator sickness to the subjects is different from the other non-immersive virtual environment as one-large projection screen, monitor screen, and head mounted display. This system provides an immersive experience in two different positions as the “driver” and the “passenger”. Therefore, this research study parallax, position,...
Electroporation is a process of the biophysical effect on cells exposed to an external electrical field is gaining applications in medical treatments, especially to create pores through a cell membrane and allow uptake of DNA into a cell. Therefore, in the theoretical evaluation of electroporation, transmembrane potential and characteristics of the cells growth is the target of the analysis. In this...
The electrical neuromodulation of the autonomous nervous system is a relatively new field of research with targets such as relief of pain by spinal cord stimulation or deep brain stimulation for Parkinsons disease. Regarding the prevention of cardiovascular diseases, one idea is to electrically stimulate e.g. the sympathetic nervous system, which can typically only be influenced by release of medication,...
This paper proposes image processing technique for the early detection of glaucoma. Glaucoma is one of the major causes which cause blindness but it was hard to diagnose it in early stages. In this paper glaucoma is classified by extracting two features using retinal fundus images. (i) Cup to Disc Ratio (CDR). (ii) Ratio of Neuroretinal Rim in inferior, superior, temporal and nasal quadrants i.e....
The growth of medical tourism in Thailand attracted many organizations to develop applications for assisting traveler information. However, these applications may not satisfy all traveler's requirements in term of medical, tourism and social network. In consequence, this study has been proposed a new prototype of the mobile social network application to support medical tourist's requirement. The proposed...
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