3 ms·
This sounds like it might be more accurate than the devices the doctors use now. When my blood pressure is measured it drops so fast the standard device starts
by tinco 6y ago
This sounds like it might be more accurate than the devices the doctors use now. When my blood pressure is measured it drops so fast the standard device starts beeping and fails to get a fix. Last few times the doctor had to use the hand pump to get a good measurement.
It's probably not super common and obviously psychosomatic, I doubt my blood pressure would drop if I were unconscious, but I imagine if I can make my blood pressure go down that fast, other people might do it less extreme and fool the device.
Anyway I'd be happy to use a less invasive device for sure.
- thaeli 6y agoThe algorithm for regular NIBP cuffs is interesting. It's actually measuring MAP - mean arterial pressure - and doing a calculation based on that and heart rate to approximate actual systolic and diastolic numbers. This is usually as or more accurate than a manual cuff where those pressures are directly detected (because there is no human error in hearing exactly when blood is flowing again in your artery) but fails badly for the small number of people who fall outside the characteristics of the groups that were used to develop the algorithm that converts MAP and heart rate into systolic/diastolic pressures. (The gold standard, which all other methods are compared to, is a direct measurement taken by sticking a needle in your artery and putting a pressure gauge on it. For obvious reasons this is avoided as much as possible.)