lucknow relying on smartwatch readings for bp and skipping medication can prove fatal as they often show bp in the normal range say kgmu doctors endocrinologist dr ak tiwari who has done extensive research on hypertension said that he too has come across a patient who would rely on smartwatch for bp measurementi told him that almost all smartwatches with bp monitoring features in india do not have central drugs standard control organisation fda and ce approvals which are considered necessary for medical grade devices said dr tiwari this means that their credibility is under question people should only trust tools by these regulatory authorities he addedciting a research published in the journal nature with the title method comparison study between a watchlike sensor and a cuffbased device for 24hour ambulatory blood pressure monitoring dr tiwari said the study on 67 patients involved adding a watchlike optical sensor to 24hour ambulatory blood pressure monitoring abpm on the upper arm or wrist there was a deviation in the bp readings taken by both the methodshe further added that study suggested that cuffless 247wristbased monitoring such as smartwatches may soon become a clinical possibility but currently they do not show accurate results of bp measurement faculty at indian institute of information technology iiit lucknow vishal krishna who has keen interest in wireless sensor networks explained that traditional upper arm inflatable cuff method especially mercury sphygmomanometer is gold standard accurate for bp measurementshowever nowadays digital sphygmomanometers are more common digital ones are easy to use but less accurate than the mercury one these upper arm inflatable cuffs measure systolic blood pressure and diastolic blood pressure by compressing the arm he said