Handling of "delayed" numerics

[bemoody]

Some numeric values (in particular, NBP) have multiple time values and we need to understand what they mean and how to use them.

• TimeStamp seems to have one-second resolution.

• SequenceNumber seems to have 5120-ms resolution.

• Often the two values are wildly different (TimeStamp could be hours earlier.)

• Often the same measurement appears multiple times with the same TimeStamp and differing SequenceNumber.

I am guessing, actually, that the TimeStamp is pretty meaningless - that it refers to the time when the measurement was first "requested" rather than when it was actually performed. I'm guessing that the SequenceNumber tells us when the measurement was reported, which might be a few seconds after it was measured.

It might be helpful to hear from somebody who is familiar with using these machines:

• is NBP measured automatically (on a schedule) or does the nurse press a button to initiate the measurement? Or both?

• how long does it usually take (from inflating the pressure cuff, to deflating it, to when the NBP measurements appear on screen)?

• how long do the values stay on screen afterwards?