Sphygmomanometer calibration: a survey of one inner-city primary care group

Abstract

Sphygmomanometers are the cornerstone of blood pressure management and yet there is no national standard for the regulation of this equipment in the UK. It is known that these machines may often be inaccurate, particularly those used in the community. We embarked upon a survey of all sphygmomanometers in current use in one inner city primary care group. Contrary to our initial hypothesis, inaccuracy rates were lower than in other reported community surveys with 2.3% of mercury and 14.8% of anaeroid sphygmomanometers failing the test. Surprisingly, inaccurate machines did not cluster in the less well developed practices. The implication is that all practices need to have procedures in place for the regular calibration of their sphygmomanometers.