Placental bands: a variant of placenta praevia?
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Biomedical subjects
Publications and source records attributed to C Haines.
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Using the National Cholesterol Education Program's Guidelines for the Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults and the most recent nationally representative serum total cholesterol and lipoprotein data for adults (ages 20 to 74 years) from the second National Health and Nutrition Examination Survey (1976 to 1980), it is estimated that 41% of adults should have lipoprotein analysis after an initial measurement of serum total cholesterol. Furthermore, it is estimated that 88% of those who need lipoprotein analysis, or 36% of all adults aged 20 to 74 years, are candidates for medical advice and intervention for high blood cholesterol levels. We estimate, based on 1986 population data, that approximately 40 million Americans between the ages of 20 and 59 years are candidates for medical advice and intervention. An additional 24 million Americans aged 60 years and older are candidates. Overall, we estimate that about 60 million Americans aged 20 years and older are candidates for medical advice and intervention for high levels of blood cholesterol, although a less intensive approach might be appropriate for elderly patients.
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Dihydropteridine reductase isolated from the bacterium Pseudomonas species (ATCC 11299a) has been purified approximately 450-fold byammonium sulfate precipitation and diethylaminoethyl-cellulose chromatographic procedures. The preparation is at least 80% pure as judged by polyacrylamide gels. Its molecular weight was determined to be about 44,000. Both dihydropteridine reductase and phenylalanine hydroxylase activities were found to be higher in cells adapted to a medium containing L-phenylalanine or L-tyrosine as the sole carbon source than in those grown in L-asparagine. The substrate of the reductase is quinonoid dihydropteridine, and the product is tentatively identified as a tetrahydropteridine through its ability to serve as a cofactor for phenylalanine hydroxylase. The enzyme shows no marked specificity for the pteridine cofactor that occurs naturally in this organism, L-threo-neopterin. The pH optimum for the reductase is 7.2, and nicotinamide adenine dinucleotide, reduced form, is the preferred cosubstrate. Inhibition of the reduced and untreated enzyme by several sulfhydryl reagents was observed. A metal requirement for the reductase could not be demonstrated. Dihydropteridine reductase was found to be inhibited by aminopterin in a competitive manner with respect to the quinonoid dihydro form of 2-amino-4-hydroxy-6,7-dimethyl-5,6,7,8-tetrahydropteridine.
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The impact on parents of having a child admitted to a paediatric intensive care unit (PICU) with meningococcal disease (MD) is discussed. Analysis, synthesis and evaluation of how nurses within a PICU can use a theoretical framework to identify and facilitate a decision-making process, regarding the support required by the parents of these children, is outlined. Peplau's interpersonal/conceptual framework is used as a basis for the investigation.
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