All sphygmomanometers should be checked and calibrated by an accredited laboratory at least annually. ![]() Automatic electronic sphygmomanometers produce systematic errors in some patients. Most sphygmomanometer surveys report high rates of inadequate calibration and other faults, particularly in aneroid sphygmomanometers. ![]() This article reviews sphygmomanometer error and makes recommendations regarding in service maintenance and calibration of sphygmomanometers. Systematic errors in blood pressure measurements caused by inadequate sphygmomanometer calibration are a common cause of over- and underidentification of hypertension. ![]() Hypertension is the most commonly managed problem in general practice.
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