Browsing by Department "Bioengineering"
Now showing items 1-20 of 20
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(1986)One of the problems associated with the quantitative analysis of respiratory sound data has been interference due to the presence of heart sounds. In the past, heart sounds have typically been filtered using cutoff frequencies ...
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(1986)The kidney is one of the most vital organs in the body. When a significant number of the kidney's functional units, the nephrons, are failing, an artificial means of fulfilling the kidney's duties is required in order to ...
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(1977)Many factors affect the relative division of blood at a bifurcation. Clinically significant conditions sometimes result in a flow reduction to one downstream branch of a major bifurcation as the result of a reduction in ...
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(1978)The resistivity of canine blood was measured at 37°C over a hematocrit range of 0 to 81 percent, with a variable-length conductivity cell similar to one developed by Dr. L. A. Geddes of Purdue University and his associates. ...
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(1980)A problem has been identified in that the treadmill stress test is far too inaccurate a test to be used in the diagnosis of coronary heart disease without some method to increase its reliability. An extensive study has ...
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(1981)A computer code representing fluid flow is described which calculates the pressure gradient in the entry region of a rigid tube. The velocity profile is calculated from graphical correction of known flow equations. ...
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(1981)This paper outlines the various models and methods used in solving the forward and inverse problems in electrocardioagraphy. Specifically, the development and implementation of a computer model which determines the body ...
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(1979)The occurrece of rising thresholds and exit block in artificial cardiac pacemaker therapy are thought to be due to fibrous tissue encapsulation of the implanted electrode. A vapor-deposited carbon-coated titanium electrode ...
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(1980)A micro Ouchterlony gel diffusion test was adapted for detecting auto-immune thyroiditis. The Ouchterlony test was standardized by testing crude thyroid extract against antiserum from an immunized rabbit. The rabbit was ...
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(1981)A model of the coronary circulation which includes the effect of ventricular contraction is developed. A fluid/electrical analog is used. The analog incorporates the effects of ventricular contraction with a voltage source. ...
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(1978)The major problems with percutaneous electrical conduits are biocompatibility and infection. A system has been designed to avoid such problems and has been tested both in vitro and in vivo. The project, carried out under ...
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(1987)This Undergraduate Fellows program focused on establishing a link between mental stress and changes in the heart’s electrical activity. Electrocardiograms were taken before and after a stressful event (a lab quiz). Examining ...
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(1984)Finding the most suitable and non-invasive way for recording the chick embryo's heart rate is the principal objective of this research. The primary rationale for this project is to develop an animal model for evaluating ...
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(1978)The pulmonary artery wedge pressure, obtained with a balloon catheter wedged in a branch of the pulmonary artery, is used in the clinical cardiovascular setting as an estimate of left atrial pressure (LAP). The theory ...
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(1979)Often, failure in the arterial tree of the human circulatory system may warrant replacement of the malfunctioning part with a vein; either from the individual himself, or from a donor. In such cases, the vein segment ...
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(1982)Network hemodynamic models of the microcirculation were formulated on the basis of a phenomenological relationship between pressure and flow for each individual vessel and specific geometries for capillary vessel connectivity. ...
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(1976)Since blood is the transport medium for the materials to be exchanged, the understanding of the flow of blood is essential to the understanding of the materials exchange. The nature of the blood flow varies considerably ...
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(1976)Pattern recognition, as used in this paper, reflects a technique of machine data analysis. In this capacity the machine receives the raw data, processes it for the purpose of separating the important features from the ...
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(1981)Hydrocephalus, a serious condition involving accumulation of excess cerebrospinal fluid in the ventricles of the brain and elevated cerebrospinal fluid pressure, can result from any of a number of factors, especially ...
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(1977)The length of the menstrual and ovulatory cycle in women is notoriously variable. The frequency distribution of menstrual intervals for women and girls are both positively skewed. Researchers studying the rhythm or similar ...