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Field evaluation of the Copal UA-231 automatic sphygmomanometer
Journal of Epidemiology and Community Health
|December 1, 1988
Summary
The Copal UA-231 automated sphygmomanometer is suitable for epidemiological field studies. However, its readings show a slight systematic increase with higher blood pressure, potentially affecting data interpretation.
Area of Science:
- Biomedical Engineering
- Epidemiology
- Cardiovascular Health
Background:
- Automated sphygmomanometers require validation for epidemiological use.
- Accurate blood pressure measurement is crucial for public health surveillance.
Purpose of the Study:
- To evaluate the Copal UA-231 automated sphygmomanometer for field epidemiological studies.
- To assess the accuracy and reliability of the Copal UA-231 against a standard device.
Main Methods:
- A field study involving 1536 participants.
- Duplicate blood pressure measurements using the Copal UA-231 and a Hawksley random zero sphygmomanometer.
- Analysis of differences and systemic variations in readings.
Main Results:
- The Copal UA-231 showed small mean differences compared to the random zero device (Systolic: 2.3 mm Hg, Diastolic: 1.9 mm Hg).
- Differences between devices increased systematically with rising blood pressure levels.
- Variability of Copal-random zero differences was comparable to replicate random zero measurements.
Conclusions:
- The Copal UA-231 is recommended for epidemiological field surveys.
- Users should be aware of the systematic bias that increases with blood pressure, which may impact epidemiological associations.