Clinical laboratory science : journal of the American Society for Medical Technology
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This study compared 2 different methodologies: hemoglobin by the HemoCue instrument and hematocrit by the microhematocrit method, to determine if there were any significant difference in the values that could affect donor rejection rates. Literature from the 1960s to 1990s reveals a variety of methods for hemoglobin and hematocrit determinations as well as discussions on fingerstick versus earlobe capillary samples. ⋯ The copper sulfate method, although the method of choice for measuring prospective donor hemoglobin levels for many years, was not a part of the study. The microhematocrit method has historically been used as the method for measuring hematocrit alone or as a secondary procedure when donors failed the copper sulfate screening test.
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To define the morphometric characteristics of normal sperm heads, and compare them to sperm head measurements used to define normal morphology using strict criteria. ⋯ Computerized image analysis is able to define a reference range for sperm head area, percent acrosome, and acrosomal area that may be used to differentiate normal form abnormal sperm heads. Maximum and minimum Ferret's diameters measure sperm head length and width, respectively. Mean maximum Ferret's diameter, minimum Ferret's diameter, and maximum-minimum Ferret's diameter ratio correspond closely to the WHO (1987) midpoint for normal sperm head length, width, and length-width ratio. The average percent acrosome of normal sperm heads determined by morphometry closely correlate to the WHO (1992) and Kruger (1988) midpoints for percent acrosome.
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Comparative Study
Comparing the learning outcomes of lecture and self-instruction methods in a senior clinical laboratory science course.
To compare the relative effectiveness of lecture and self-instruction methods of instruction in a senior clinical laboratory science course. ⋯ The results of the study generally support the hypothesis that the self-instruction method is as effective as the lecture method in teaching clinical parasitology. By incorporating self-instruction into a clinical laboratory science curriculum, many hours of lecture can be eliminated, and students can learn the material at their own pace. Students comprehend the material effectively, and are relieved from some of the intensity of the didactic approach to instruction that dominates clinical laboratory science curricula.
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To evaluate the effectiveness of an educational program using a combination of live satellite programming and individualized instruction. A secondary goal was to develop an evaluation strategy that would be useful to other educators who provide distance-based educational programs. ⋯ Distance-based education using a combination of interactive videoconferencing and self-study material can be a useful tool to enhance cognitive skills for a geographically diverse group of individuals. If carefully planned in advance, evaluation of distance-based educational programs can provide information that verifies the effectiveness of the program.
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To review basic blood components and currently acceptable transfusion practices. ⋯ Considering the known risk factors of blood and blood component transfusions, it is essential that components be used only when necessary. Criteria for appropriate transfusion have changed over the years; old transfusion triggers are no longer acceptable. To provide the best medical care to the patient, the clinical laboratory scientist must stay abreast of currently acceptable transfusion practices.