PubMed Health⌕ Search

Biomedical subjects

J S Black

Publications and source records attributed to J S Black.

14 recordsLinked to original sources
PubMed1997

A comparison of ECG cancellation techniques applied to the surface recording of somatosensory evoked potentials.

The use of somatosensory evoked potentials (SEPs) for determining spinal cord integrity in a clinical setting is well known. The poor signal-to-noise (SNR) ratio of such measurements has led to ensemble averaging being employed to extract the signal from the background noise. Over the thoracic region, the poor SNR is largely the result of interference generated by the cardiac musculature. Therefore, any reduction in the level of this cardiac interference will greatly improve the performance of any SEP monitoring system. Three methods were investigated as techniques to reduce the cardiac interference in SEP measurements. These were clipping, gating and adaptive noise cancellation (ANC). It was found that, although clipping and gating performed as well as, if not better than, ANC, these techniques were both very sensitive to the setting of a threshold level. The linear ANC scheme employed circumvented the problem associated with a threshold level, and with an order of 50, SNR improvement figures of approximately sixfold were achievable over the entire thoracic region.

Biomedical Engineering↗
PubMed1994

Polygamous sex.

Explore the source record for details and available documents.

Ejaculation↗
PubMed1992

Health care and consumer control: Pittsburgh's Town Meeting for Seniors.

Since 1988 two hospitals in Pittsburgh have conducted a semiannual Town Meeting for Seniors designed to provide community- based health education so that seniors can make informed decisions not only about medical care, but also about issues such as Medigap insurance, advance directives, and proper nutrition. Attendees have been predominantly white and middle class, reflecting the demographics of the surrounding area. The Town Meeting has been enthusiastically received by consumers and has led to the creation of several new community programs, including exercise classes, driver education classes, durable power of attorney workshops, and expanded insurance counseling services.

Aged↗
PubMed1990

Health promotion and disease prevention in the elderly. Comparison of house staff and attending physician attitudes and practices.

The purpose of this study was to evaluate and compare attending physician and house staff attitudes and practices regarding health promotion and disease prevention in the elderly. Seventy-four physicians (38 house staff and 36 attending physicians) were surveyed from four sites in Pittsburgh, Pa, regarding their agreement with recommendations of the American Cancer Society and the Canadian Task Force. Two hundred fifty patients were interviewed and their charts were reviewed for performance of the recommendations. In all patients, physicians agreed highly with the American Cancer Society and the Canadian Task Force recommendations (agreement, 80% to 100%), with the exception of proctoscopy and thyroid examinations. Physicians performed screening procedures much less frequently. House staff and attending physicians differed regarding their attitudes about prevention. House staff felt the need for more formal instruction and were more positive regarding a healthy life-style and commitment to health promotion. The significant predictors of tests (defined as either examination or test ordered by a physician) were presence of a checklist, site of practice, and physician status. A logistic regression analysis was performed; however, this model could not entirely explain the variations found. Although physicians agreed with recommendations for screening, the attending physicians and house staff (particularly attending physicians) were less likely to perform the screening, especially in the elderly.

Aged↗
PubMed1988

Night cramps.

Explore the source record for details and available documents.

Circadian Rhythm↗
PubMed1982

IUD removal.

Explore the source record for details and available documents.

Female↗
PubMed1976

The need for psychosexual counselling in family planning practice.

In this review article, the case in favour of the need for psychosexual counselling in family planning practice will be presented. Since psychosexual counselling is a multidisciplinary subject, family planning clinics and practices are ideally suited to the task. In presenting the case, liberal illustrative examples are provided in order to depict what the current and suggested extended facilities and techniques involve. The article is also intended to act as a comprehensive guide for students, nurses, medical practitioners and specialists alike, to bring them up to date in new concepts in history taking, physical examination and the sexually explicit aspects of family planning. Traditionally taught concepts may well be out of date in a modern society.

Contraception↗