Biomedical subjects
Publications and source records attributed to I Harris.
A reduction in the number of radiographs for many investigations has been advocated. This study aims to assess the need for control views in sialography and whether the post-contrast lateral oblique radiograph would be satisfactory, at least initially, as the sole standard post-contrast film.
Most clerkship evaluation systems give the greatest evaluative weight in deriving grades to some form of evaluation by faculty and housestaff, although few studies have been reported concerning which elements of performance are most important or which discriminate best. The results of this study show that a select group of faculty, heavily involved with assessment of student performance, agreed that certain aspects of performance were more important and/or discriminated better between average and superior medicine clerks. We suggest that those aspects of performance be given more consideration when designing curricula, providing student feedback, and assigning grades for medicine clerkships and that medical educators engage faculty and housestaff in the formal discussion of issues surrounding evaluation.
When rats were fed a diet containing kidney bean (Phaesolus vulgaris) urea excretion was increased 3-5 fold. Isolated liver mitochondria from rats fed the kidney bean diet produced 40% more citrulline in the presence of arginine than mitochondria isolated from control rats. Mitochondrial activities of urea cycle enzymes and N-acetylglutamate synthetase were similar in animals fed diets containing kidney bean or lactalbumin. The possible mechanisms causing acute urea production in rats fed with kidney bean are discussed.
Individual differences in learning style should be one factor that is considered in medical education program planning and instruction, and this can be accomplished by using Kolb's learning style inventory (LSI) in a primary care internal medicine residency program. Case accounts are presented to suggest how the LSI can be used to enrich teaching-learning encounters. To our knowledge, these case accounts are the first reports of an important use of knowledge about learning style, obtained through instruments such as the LSI. Other educational applications are suggested with respect to evaluation formats and choice of instructional methods.
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When determining the total body content of many elements by neutron activation analysis, irradiation and whole body counting by scanning along the length of the body has significant advantages. A neutron source of lower output and a whole body counter using smaller detectors and shielding (than otherwise needed) can provide a high, uniform response for many elements throughout the body. This was previously achieved by making the speed and direction of scanning identical in irradiation and counting (one-way scanning). A simple theoretical model for scanned irradiation and counting is described. The model is used to show that a scanning regime in which both scanning directions are used (two-way scanning) can provide acceptably uniform response for elements having induced activities of a wide range of half-life. This is supported by measurements made using an existing scanning facility for total body in vivo neutron activation analysis. The two-way scanning regime offers the advantages of increased patient comfort, simpler operation and more efficient use of the time available for counting induced activity.
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Six cases of lead encephalopathy in Black children are described. There was a delay in the diagnosis of the first 4 cases, partly owing to a lack of awareness of the possibility of exposure to lead in this population. The importance of the safe disposal of industrial wastes is stressed.