BP Values Difference Depending on the Height of Hand Position in Oscillometric Electronic Digital BP Monitor and Its Comparison with Mercury Sphygmomanometer

Kim, Jae Min; Kwon, Ju Won; Sun, Joung Min; Jeong, Ja Yo; Kim, Bong Hwa; Lee, Du Yong; Yoon, Sug Joo; Kim, Chong Suhl; Kim, Young Sook

Abstract

BACKGROUND
There is pressure difference depending on the height of hand position when blood pressure is taken, applying the oscillometric electronic digital BP(blood pressure) monitor. Authors have calculated the degree of BP differences, and evaluated the accuracy and effectiveness of the digital BP monitor comparing with the conventional Mercury Sphygmomanometer. METHOD: Randomized sixty cases consisting of in-patients and hospital workers were subjected for this study. BPs were taken at three different levels-nose level, heart level and knee level-on conventional sitting position applying OMRON Digital Automatic Blood Pressure Monitor and conventional Mercury Sphygmomanometer, and statistical analysis was made. RESULTS: At the nose level, systolic BP and diastolic BP were lower with 23.5mmHg and 18.9mmHg respectively, than at the heart level, while at the knee level, they were higher with 21mmHg and 17.5mmHg respectively, than at the heart level. No actual statistical difference of systolic and diastolic values between OMRON Digital Automatic Blood Pressure Monitoring method at the heart level and conventional Mercury Sphygmomanometeric method. CONCLUSION: Present study demonstrated significant discrepancy of BP values, in systolic and diastolic values, depending on the height of measured finger, when OMRON Digital Automatic Blood Pressure Monitor is applied in taking BP on conventional sitting position. However, no actual discrepancy of BP values was noted between two methods when BP is taken at heart level by OMRON Digital Automatic Blood Pressure Monitor and on brachial artery BP by conventional Mercury Sphygmomanometer. Thus OMRON Digital Automatic Blood Pressure Monitor could take the place of Mercury Sphygmomanometer in taking peripheral BP, which subsequently enable us to estimate central artery BP, which is believed to be better clinical index, through this much more handy electrical oscillometric device in the future.