Abstract
Introduction: Measurement of blood pressure accurately is of utmost importance in detection of hypertension and monitoring a wide range of clinical conditions. The use of mercury sphygmomanometer, which was considered gold standard is declining due to the environmental concerns. Since the use of non mercury devices has increased , the accuracy of these devices needs to be ascertained. Hence, this study was conducted. 
 Aims & Objectives : To measure and compare the blood pressure recordings using mercury sphygmomanometer ,aneroid and digital apparatus. 
 Materials and Methods : This cross sectional study was conducted on 102 first year MBBS students of MMC & RI, Mysore, aged between 18 & 20 years ,who voluntarily agreed . Blood Pressure was recorded using mercury manometer, followed by aneroid and then by digital apparatus giving 5 minutes interval between the recordings .Data was analyzed using appropriate statistical methods. 
 Results : The mean SBP by Mercury , aneroid and digital manometers was 108.58 ± 10.68 , 107.11 ± 12.41 and 116.5 ± 13.54 respectively. Mean DBP by Mercury , aneroid and digital manometers were 71.84 ± 7.44 , 72.94 ± 7.95 and 75.39 ± 8.71 respectively. There was no statistically significant difference except with the DBP recordings of aneroid & digital apparatus , which had a `p` value of .002. 
 Conclusion : The systolic and diastolic BP measured by these apparatus (mercury , aneroid & digital) are comparable and can be used interchangeably in practice.
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