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Biomedical subjects

C Clifford

Publications and source records attributed to C Clifford.

70 records · Page 4Linked to original sources
PubMed1982

Infection.

Explore the source record for details and available documents.

Cross Infection↗
PubMed1978

A reappraisal of the mechanisms of hypocholesterolemic action of therapeutic agents.

The most commonly used methods to study the mechanisms of hypocholesterolemic action of therapeutic agents generally determine the turnover of total (exchangeable) cholesterol pools in the body. This approach is based on the view that whatever increases the total load of cholesterol in the body will increase the levels of plasma cholesterol, and vice versa. Despite the importance of this assumption it has never been tested, and there is no evidence to indicate that it is valid under all conditions. This "overload" hypothesis dates from the times before the importance of plasma lipoproteins was recognized and their role in the transport of lipids was well understood. However, it is becoming increasingly clear that the levels of plasma cholesterol are determined more directly by the "transport" of cholesterol into and out of plasma compartment by lipoproteins than by the synthesis, absorption and elimination of cholesterol from the total body pools. Any effects that the latter parameters of cholesterol metabolism have on the levels of plasma cholesterol must be mediated through changes in synthesis and the subsequent metabolism of plasma lipoproteins. In other words, in any equation relating changes in the levels of plasma cholesterol to the changes in synthesis, absorption and elimination of cholesterol from the body pools we must consider the "transport" of cholesterol by lipoproteins and their metabolism.

Animals↗
PubMed1975

Plasma lipid changes in young adult couples consuming polyunsaturated meats and dairy products.

Twenty-five young couples consumed either a saturated or polyunsaturated fat diet for a 20-week period. The polyunsaturated beef, lamb and dairy products, high in linoleic acid, were produced by feeding ruminant animals "protected lipid" feeds which prevent hydrogenation of fats in the rumen. The experimental design provided for four dietary groups: A) saturated diet for 20 weeks; B) polyunsaturated diet for 20 weeks; C) saturated diet for 10 weeks then polyunsaturated diet for 10 weeks; and D) polyunsaturated for 10 weeks then saturated diet for 10 weeks. Polyunsaturated-to-saturated ratios (linoleic: total saturated fatty acids) for the diets were: prestudy, 0.43-0.56; saturated 0.11-0.14; polyunsaturated, 0.56-0.62. Factors other than diet that appeared to affect cholesterol responses were carefully considered. During the initial 3 weeks (regimentation period) plasma cholesterol concentration decreased in all groups irrespective of diet. This was followed by two experimental periods in which the effects of the prescribed diets were readily apparent (response periods I and II). The final 4 weeks of the study were characterized by diminishing compliance with the dietary discipline (abatement period). Subjects in each group (A,B,C,D) were subdivided into high and low on a basis of each group's initial median cholesterol level. Those in the high subgroups were very responsive to dietary changes whereas those in the low subgroups were not. Combined responses of high subjects were: polyunsaturated diet, -10.7 mg/dl (P less than 0.025), saturated diet, d8 mg/dl (P less than 0.05). Combined difference between saturated and polyunsaturated diets was 18.5 mg/dl or approximately a 10% cholesterol difference between the experimental polyunsaturated and saturated diets.

Adult↗
PubMedDate not supplied

Clinical practice: where does the nurse teacher fit?

The changing pattern of nurse education with diploma level qualification and increasing integration with higher education raise questions about the support and supervision of student nurses in clinical placements. Clinical practice is seen as giving care at the bedside. The role of the nurse teacher in this arena is unclear. Individual nurse teachers have expressed the wish to work in nurse education to help improve the quality of care, yet the indications are that they are unable to fulfil a practice role. A coordinated professional response to the problem of addressing the theory/practice gap in nurse education has not been evident following the demise of the clinical teacher role. The organization of health care and nurse education in the higher education arena will have an impact on the clinical role of the nurse teacher in future. The clinical role of the nurse teacher will be critical in future both for ensuring that students in clinical placements receive adequate supervision and for clarifying the role of the nurse teacher in higher education.

Education, Nursing, Diploma Programs↗
PubMedDate not supplied

The evolution of the Women's Health Initiative: perspectives from the NIH.

The Women's Health Initiative (WHI) addresses some of the major health concerns of postmenopausal women. It is designed to test whether long-term preventive measures will decrease the incidence of cardiovascular disease, certain cancers, and fractures, and it seeks to find better predictors of future health and disease in older women. This report traces the evolution of the clinical trial and observational study (CT/OS) components of WHI from early planning in the 1980s to the current status of the WHI CT/OS as an integrated, ongoing clinical study. Particular attention is directed to the antecedent planning meetings and feasibility studies that formed the underpinnings of the WHI. The issues of hormone replacement therapy and of the optimal diet for postmenopausal women were investigated for almost a decade prior to WHI. However, no studies of sufficient size and duration to confidently test the value and risks of these approaches were initiated because of the cost and insufficient political commitment. The initiation of WHI in 1991 represents the confluence of scientific need and capability with the social priorities to improve the health and welfare of women.

Aged↗