I was told many years ago that a major difference between a "hospital grade" NIBP & a cheap one was that hospital grade units ran far more sophisticated software.
The pocket units would measure Mean pressure then extrapolate using the rate of pressure change to estimate Sys & Dia. "Proper" units such as Dinamaps electronicaly measured all 3 readings. Critikon manuals seem to bear this out (at least for Critikon products).
Funnily enough at a recent training day I was informed by a Critikon trained trainer that in fact the Critikon units ALSO use a single measurement & lookup table. Strange!
Does anyone know any more on this alleged difference?

Marc