Key result
Elag-Koln semiautomatic BP recorders correlate with mercury sphygmomanometers but yield ~4 mmHg higher systolic readings.
Why the study?
Does the Elag-Koln semiautomatic blood pressure recorder provide accurate blood pressure measurements compared to a standard mercury sphygmomanometer in subjects with a wide range of blood pressures?
Observational (n=24)
Does the Elag-Koln semiautomatic blood pressure recorder provide accurate blood pressure measurements compared to a standard mercury sphygmomanometer in subjects with a wide range of blood pressures?
The Elag-Koln semiautomatic blood pressure recorder demonstrates high correlation with standard mercury sphygmomanometry, supporting its potential suitability for general use despite minor systematic differences.
Answers are grounded in this paper and cite their sources.
May support semiautomatic BP recorders in select settings; leaves open calibration needs for research and broader validation.
The performance of an Elag-Koln semiautomatic blood pressure recorder was compared with the London School of Hygiene mercury sphygmomanometer in 24 subjects providing a wide range of blood pressure measurements. Readings with the two instruments correlated highly (for systole, r=0-99; for diastole phase 4, r=0-97; for diastole phase 5,r=0-98), and the slopes of the regressions did not differ significantly from unity. Elag-Koln measurements were higher for systole (mean difference 3-7 mmHg,P less than 0-001) and diastole phase 5 (mean difference 7-4 mmHg,P less than 0-001), but agreed closely with diastole phase 4 readings with the London School of Hygiene instrument. The Elag-Koln recorder tested was compact, easy to use, and had acceptable accuracy. This type of instrument deserves further testing to examine its suitability for general use.
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Ramsay et al. (1977) reported an observational. Elag-Koln semiautomatic blood pressure recorder vs. London School of Hygiene mercury sphygmomanometer was evaluated on Blood pressure measurements (systole and diastole) (mean difference 3.7 mmHg for systole, p=<0.001). The Elag-Koln semiautomatic blood pressure recorder correlated highly with a mercury sphygmomanometer (r=0.99 for systole) but yielded higher systolic readings (mean difference 3.7 mmHg, P<0.001).
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