Clinical evaluation of the Nippon Colin BP-103N blood pressure monitor.

The automatic oscillometric Nippon Colin BP-103N blood pressure-monitor was evaluated in comparison with the Hawksley random zero mercury sphygmomanometer using standard methods. The monitor under test was found significantly to over-read mean systolic pressures by 4.2 mmHg and mean diastolic pressures by 4.6 mmHg. The coefficient of variation was 5.4% for systolic and 6.4% for diastolic pressures. Analysis of variance showed that the difference between the two manometers was within the random variability of readings obtained.