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Biomedical subjects

P V Lee

Publications and source records attributed to P V Lee.

15 recordsLinked to original sources

Principal structural testing of trans-tibial prosthetic assemblies: specimen preparation.

A simple alignment apparatus and the method of transferring the offset test load to the prosthetic assembly through an aligned mandrel for the principal structural tests in accordance with ISO 10328 is presented. The new alignment apparatus was used to prepare test specimens consisting of traditional laminated prosthetic sockets, adaptors, shanks and foot blocks. The alignment apparatus proved useful in ensuring proper orientation and positioning of the components relative to one another as well as to the loading coordinate axes. The sockets and the other components achieved the maximum load specifications during the static failure tests and no failure of components was observed in the cyclic tests.

Artificial Limbs↗

Percutaneous transluminal coronary angioplasty in the elderly: epidemiology, clinical risk factors, and in-hospital outcomes. The Northern New England Cardiovascular Disease Study Group.

OBJECTIVES: To explore the relation between older age and clinical presentation, procedural success, and in-hospital outcomes among a large unselected population undergoing percutaneous transluminal coronary angioplasty (PTCA). BACKGROUND: Although more elderly patients are receiving PTCA, studies of post-PTCA outcomes among the elderly have been limited by small numbers and exclusive selection criteria. METHODS: Data were collected as a part of a prospective registry of all percutaneous coronary interventions performed in Maine, New Hampshire, and from 1 institution in Massachusetts between October 1989 and December 1993. Comparisons across 4 age groups, (<60, 60 to 69, 70 to 79, and 80 years and above) were performed using chi-square tests, the Mantel-Haenzsel test for trend, and logistic regression. RESULTS: Twelve thousand one hundred seventy-two hospitalizations for PTCA were performed with 507 of them (4%) in persons at least 80 years old. Octogenarians were more likely to be women, have multivessel disease, high-grade stenoses, and complex lesions but were less likely to have hypercholesterolemia, a history of smoking, or have undergone a previous PTCA. In the elderly, PTCAs were more often performed urgently and for unstable syndromes compared with younger age groups. Advancing age is strongly associated with in-hospital death, and among the oldest old with an increased risk of postprocedural myocardial infarction. Despite differing presentation and procedural priority, angiographic success and subsequent bypass surgery did not vary by age. CONCLUSIONS: With the increasing age of the population at large as well as that segment at risk for cardiac revascularization, information about age-associated risks of the procedure, especially the substantially higher risk of death in octogenarians, will be critical for both physicians and patients considering PTCA.

Age Factors↗

Medical student education in ambulatory care.

New forms of health care delivery and reimbursement trends have increased interest in the ambulatory care setting as a site for medical student education. It is estimated that from 50% to 60% of all medical students receive some portion of their medical training in a Department of Veterans Affairs (VA) facility. However, only about 5% of the total student ambulatory care educational experience is taking place at VA facilities. The problems in implementing and maintaining ambulatory care teaching programs for medical students encompass a variety of areas, such as lack of faculty incentive, time, expertise, and commitment; student resistance to training in this less attractive arena, and economic obstacles. Medical schools and VA medical centers will have to work in a mutually supportive relationship to develop joint goals and objectives for medical student teaching. Commitment of resources is essential, as is the need to reward ambulatory teaching through academic advancement and salary incentives. Faculty recruitment and development will be necessary, and research to identify the most successful of the VA ambulatory care teaching settings should be undertaken. The time has come for improved medical student education in VA ambulatory care settings, and there is now a need for collaborative planning between the medical schools and the VA.

Ambulatory Care↗

Changing prescribing practices through individual continuing education.

In a study involving 94 practicing physicians, committees of clinical pharmacologists analyzed copies of prescriptions (and additional relevant clinical data) to identify problems in prescribing ("educational needs"). Only the ten most commonly prescribed drugs were studied in the samples of 200 prescriptions from each physician; 1061 problems were identified in the prescriptions of the 94 participants. One physician group (n = 41) received feedback (instructional packets) addressing specific problems in prescribing; a second sample consisting of 200 prescriptions was then collected and analyzed. The physicians in this group changed their prescribing practices 30% of the time in accordance with recommendations, whereas those in the group that received no educational feedback changed in only 3% of the cases. When a physician stated an intention to change, an actual change resulted 50% of the time. Individualized teaching in response to real events in practice is a practical and effective method of improving physician performance.

California↗

Determining educational needs in the physician's office.

Techniques to identify educational needs from real events in office practice are usually unwieldy, intrusive, and expensive. We are developing an approach based on review and analysis of individual physicians' prescriptions. This technique imposes little additional effort on the participating physician, yet effectively identifies problems in drug prescribing that can lead to specific educational remedies. Experience with 44 physicians using the system shows wide variation in prescribing practices as well as in the needs identified. The problems can be grouped into seven major categories: inappropriate indications; excessively frequent prescriptions for certain drugs; prescription of drugs with abuse potential; inadequate instructions; excessive dosage, especially in elderly patients; prescription of ineffective drugs; and potential drug interactions. The method offers promise as a component of an individualized guidance system linking continuing medical education with actual medical practice.

Dosage Forms↗

Drug therapy in the elderly: the clinical pharmacology of aging.

It is becoming increasingly apparent that age and the changes of aging are factors to be taken into account in drug therapy and in the study of drug actions. Older people have more adverse reactions to drugs than do younger people. Several studies in hospitalized patients have confirmed the fact that the incidence of untoward reactions to drugs increases with advancing age.

Aged↗