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This paper describes the design of a medication dispenser developed for narcotic rehabilitation programs. The dispenser holds up to four doses of medication and operates under remote supervision. A direct-into-mouth dispensing mechanism is a feature of the device. The mechanical dispenser mechanism includes a rotating barrel, medication tubes and dispensing slider unit. The electronic design involves...
Catheter curvature affects accuracy of intraventricular blood volume measurement when using conductance catheter techniques, especially with irregular geometries, such as in the right ventricle. To investigate this effect, we present results from using different curved catheter configurations and different numbers of electrodes in a simple Finite Element model. It was found that there is an apparent...
Assessment of opioid dependent patients in a replacement program has traditionally relied on conventional methods such as urine testing or face to face examination with a physician. We are introducing new assessment techniques based on pupillometry, reaction time and slurring of speech. The pupillometry test uses a webcam, controlled lighting and customized software to measure pupil parameters. The...
In the adaptive fuzzy and neural network control field, there are two basic configurations: direct and indirect. It is well known that the direct configuration needs more restrictions on the control gain than the indirect configuration. In this paper, we propose a direct adaptive fuzzy controller with less restrictions on the control gain. Using an extension of the universal approximation theorem,...
Estimation of parallel conductance using the impedance electrode technique is usually done assuming isotropic conditions. This may not be the best solution since the myocardium is an anisotropic material. This paper exposes the effect of fiber orientation for volume measurement using a conductor model with asymmetrical source electrodes. Simulation results show calculated volumes between surrounding...
Physicians are often considered as the final pathway for nearly all professional decisions about the use of health resources. Yet with respect to drugs, pharmacists are in many cases the final link between the medication and the patient. This approach of medication intake can be hazardous to the patient. Several mechanical as well as automatic medication dispensers incorporating alarm and automatic...
A boundary element (BE) model was developed of the electric potential field in the heart arising from electric potentials applied on implanted defibrillator electrodes. The model solved Laplace's equation for potential and was implemented using the BE method with realistic torso structures. An efficient out-of-core solver was developed, allowing any size problem to be solved, subject only to computer...
A wide range of blood flow measurement techniques were reviewed in regard to development of an implantable blood flow sensor. These include indicator methods and techniques to measure velocity and stroke volume. Most techniques were found to be unsuitable for implantable use in humans. The intracardiac impedance method was favored, though significant methodological obstacles remain
Calculation of intra-ventricular blood volume using the impedance electrode technique suffers from inaccuracy arising from irregularity in ventricular geometry and non-uniformity in imposed electric fields. This is particularly evident in the right ventricle. To investigate this problem, we present analytical and numerical solutions for the electric field in a conductor with asymmetrical source electrodes...
Even though sailboarding is a popular sport with many thousands of participants worldwide the forces experienced whilst sailboarding on water have not been documented. Harness line force is one of the key forces acting when sailboarding. The aim of this paper is to outline a method for measuring this force and to document its magnitude when sailboarding in a range of wind strengths (12 knots to 30...
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