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Biomedical subjects

C A Nash

Publications and source records attributed to C A Nash.

5 recordsLinked to original sources
PubMed1994

Ensuring the accuracy of digital sphygmomanometers for home use.

OBJECTIVE: To describe the techniques for assessing the accuracy of digital sphygmomanometers. DESIGN: The necessary equipment and the recommended procedures for determining the accuracy of digital units by comparison with a mercury sphygmomanometer were reviewed. RESULTS: Evaluation of the accuracy of digital sphygmomanometers is a simple two-phase process: (1) comparison of the pressure sensors against a mercury column and (2) assessment of the ability to detect Korotkoff sounds. The only equipment needed is a mercury column, a Y tubing, a "dummy" arm, two male-female adapters, and a stethoscope. The two short ends of the Y tubing are used to connect the mercury sphygmomanometer and the digital unit, and the long end of the Y tubing is attached to the cuff of the digital unit. The inflation mechanism of the digital unit (manual or automatic) influences the approach used for comparing the two units. For both manually and automatically inflatable digital units, the digital display should be within +/- 4 mm Hg of the mercury level; likewise, a properly functioning digital unit should detect Korotkoff sounds (both systolic and diastolic readings) within +/- 4 mm Hg of the auscultated blood pressure measurements. If the digital sphygmomanometer is judged to be accurate, 6-month reevaluations are suggested. CONCLUSION: With use of minimal equipment, digital sphygmomanometers (except the new finger blood pressure monitors) can easily be assessed for accuracy by comparing the pressure sensors against a mercury unit and testing the sensitivity for detecting Korotkoff sounds. Self-monitoring of the blood pressure is helpful in assessing blood pressure changes over time and in evaluating antihypertensive therapy.

Blood Pressure Monitors↗
PubMed1992

Squamous cell carcinoma in southern and northern Australia.

Squamous cell carcinoma (scc) of the skin was studied in two similar populations, one living in the temperate zone of Australia, the other living in the tropics. In the tropics, the patients were significantly younger, the man to woman ratio approached unity, and women had significantly more sccs on the legs. In the temperate zone, men had significantly more on the head and neck, but women had significantly more on the upper and lower limbs.

Adolescent↗
PubMed1990

Hypertension: role of the nurse-therapist.

In this article, we describe the evolution of the hypertension nurse-therapist program at the Mayo Clinic. Because of the large numbers of patients in whom hypertension is a major risk factor for cardiovascular disease, a leading cause of death in the United States and other industrialized nations, an approach was devised in which, with physician supervision, specially trained nurses managed many aspects of the acute and long-term outpatient care of hypertensive patients. Clinical trials in which nonphysician care-providers were used to treat hypertensive patients and to maintain long-term blood pressure control provided an opportunity to identify and to expand the concept of continuing care for blood pressure management in a community hypertension clinic. Currently, almost 7,000 patient visits are scheduled annually in this program, and these patients are seen by five full-time hypertension nurse-therapists.

Ambulatory Care↗