In reply to TheDrunkenBakers:
Hi there, I’m in the 6th year running a patient study at Royal Derby Hospital to continuously measure BP non invasively during dialysis, and predict hypertension and hypotension episodes. Alongside the kit we’ve developed, we take regular measurements automatically from a brachial arm cuff for calibration, so I’ve literally taken thousands of cuff measurements.
the most important things to take account of are having the cuff at the same height as the heart. Preferably have that arm supported, on a chair arm, and most importantly take at least 5 quiet minutes to relax before measurement.
There are loads of papers quoting 1 minute intervals as being ok and from a physiological point of view is just about ok for the vasculature to recover. The first reading is always high in all the literature, so multiple measurements are best. As a rule of thumb, we work on 5 minute maximum frequency to allow physiology and psych to relax fully, and actually our calibration readings are at 20 minutes frequency currently, so take some time between readings to relax again. Do this over a period of a few days, including weekend, and keep a record.
Finally, at the beginning of treatment, I can always identify someone who has ignored the guidelines over Sodium and alcohol intake since the last session. If your BP remains at the levels you quote, you need to see a GP who will automatically ask you about stress, sodium and alcohol intake and probably BMI. Don’t panic though, this can be sorted.