I have a blood pressure and I want to calibrate it. There is no internal calibration on it. How can we calibrate it?
Dear Seyed Mojtaba Mostafavi
A prerequisite for getting an accurate measurement is that consult your doctor whether bicep or wrist blood pressure monitor is suitable for you. Before calibrating the blood pressure monitor, make sure to sit in a relaxed state with your back resting on the chair for at least 5 minutes.
Put the blood pressure cuff on the upper arm and select the same arm for every reading. The cuff must be positioned at same horizontal level as the heart. Then start the machine, soon after the cuff begins to pump up and start the measurement.
When the measurement is taken, cuff deflates and shows a depletion rate of 2-5 mmHg. This depletion rate is an indication of accurate measurement by blood pressure monitor. The final reading will appear on the screen when the process finished. The standard reading for diastolic should be not higher than 80 and for systolic around 120.
Hope this helps.
Regards
Thank you Qamar Ul Islam . But I need an accurate calibration. Because I need to make sure about the measurement. For some instruments, for example a balance, you can use reference weights for calibration. Is there any instrument for the calibration of blood pressure?
The blood pressure measuring devices are calibrated according to OIML-R16 standard. Particularly for digital sphygmomanometers it is OIML-R16-2. It is general requirement that the manufacturer of BP device takes type approval and only those devices are legally launched into market. The devices that are used by the doctors need to be calibrated for the ultimate safety of patients and avoid possible wrong treatment. This responsibility is generally given to the Legal Metrology department of the country.
I did not understand your concern. For the user actually the BP measurement is done by highly skilled person. As specified by Qamar Ul Islam even if device has good accuracy, the accuracy of BP measurement depends on various other factors that influence during measurement.
You can get device calibrated by legal metrology laboratory if they provide this service. If you have doubt with digital device accuracy I suggest using the classical mercury based device with stethoscope is better option. Because the ultimate traceability is still maintained with such devices or principle and expert doctors.
Thank you P. K. Dubey for your explanation. I was exactly looking for the instruments for this calibration. It is not personal and I am working in a calibration company and recently, we want to enter to this area of work.
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