Age-based differences between mercury sphygmomanometer and pulse dynamic blood pressure measurements.

Area of Science:

• Cardiovascular physiology
• Medical instrumentation
• Biomedical engineering

Background:

• Mercury sphygmomanometers and oscillometric methods are standard for blood pressure measurement in diverse age groups.
• Differences in measurement techniques may lead to age-related variations in accuracy.

Purpose of the Study:

• To compare blood pressure readings between mercury sphygmomanometers and pulse dynamic oscillometric devices.
• To investigate the influence of age on the agreement between these two measurement methods.

Main Methods:

• 154 subjects were divided into three age groups (11-22, 23-54, 55-85 years).
• Systolic and diastolic blood pressures were measured simultaneously using both mercury sphygmomanometers and a pulse dynamic oscillometric device.
• Measurements followed 1987 Association for the Advancement of Medical Instrumentation guidelines.

Main Results:

• Overall, mean differences were -5 mmHg for systolic and 1 mmHg for diastolic blood pressure between the methods.
• Systolic blood pressure was significantly higher with the pulse dynamic method in younger groups (11-22 and 23-54 years).
• No significant difference in systolic blood pressure was found in the oldest group (55-85 years); diastolic pressure showed no significant difference across all groups.

Conclusions:

• Age-related arterial changes impact the agreement between mercury sphygmomanometers and pulse dynamic oscillometric devices.
• While generally correlating well, the accuracy of systolic blood pressure measurement depends on patient age and the specific device used.