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Biomedical subjects

C W Nelson

Publications and source records attributed to C W Nelson.

At least 109 records · Page 6Linked to original sources
PubMed1989

Effect of thallium-201 blood levels on reversible myocardial defects.

To determine if 201Tl plasma blood levels correlate with the presence of reversible myocardial defects during exercise testing, 14 patients with stable coronary artery disease underwent two separate exercise 201Tl stress tests. Between initial and delayed imaging, on one test the patients drank an instant breakfast drink (eating) and on the other they drank an equivalent volume of water as a control (H2O). Thallium-201 imaging was performed immediately postexercise, immediately after eating/H2O and 210 min after eating/H2O. Between initial and immediate post eating/H2O images 201Tl reversible defects occurred in 27/38 regions in the H2O test versus 15/38 regions in the eating test (p = 0.02). Over this early time period, plasma 201Tl activity was significantly higher in the H2O test than eating test (p less than 0.05). In conclusion, early reversal of 201Tl defects may, in part, be the result of higher plasma 201Tl activity early after initial postexercise 201Tl imaging.

Angina Pectoris↗
PubMed1988

Helping patients decide: from Hippocrates to videodiscs--an application for patients with low back pain.

This paper outlines a modular, microcomputer and videodisc expert system, for patients with mechanical low back pain. The system incorporate facts, rules, and methods to extract data, opinions, information, and user preferences. It supports individual patient needs with a broad knowledge base, and analytical modelling techniques that connect flexible inference structures and user choices. Videodisc based expert systems help break the bottleneck in relevant medical knowledge representation. The expert system program serves the user in the capacity of teacher, confidant, interpreter, diagnostician, and adviser.

Adult↗
PubMed1985

Does ethnicity matter? Utilization, responses to medical problems, attitudes and satisfaction in a medically underserved community.

Sample surveys offer only surface knowledge of complex questions in healthcare. When properly designed, administered, analyzed, discussed, and acted on, however, they can serve as an educational/communications device. Strategic planning necessitates evaluation of external and internal factors that affect the organization. In the community served by the health organization that sponsored this research, key administrative personnel believed that ethnic attitudes and behavior could influence program utilization. The survey and subsequent discussion of its findings helped to corroborate this premise. As a result, administrative efforts were made in improving communications, hiring and training, and program structure to obtain higher level of community acceptance.

Attitude to Health↗
PubMed1977

Patterns of association voting behavior: I. Demographic correlates of voting/nonvoting and preference for candidates/issues.

A total of 58% of the eligible members voted in the 1974 APA balloting involving 6 officers, 13 amendments to the By-Laws, and a membership-initiated referendum. Analysis revealed that there was no significant relationship between member characteristics and voting/nonvoting behavior and that relatively few members followed specific voting patterns. The data support the view that most members voted carefully and relatively independently of organized influence.

Adult↗