Geoff sent me over to this topic from another.
If I read this right time/date stamp seems to be a problem here, and it is compounded by the fact that every clock in the hospital is different because the PFI partner were to cheap to have a centrally managed solution for it.
It also doesn't help that the IT depts. servers dont even point to an NTP Server.
Where I was we had 2 servers that were the NTP servers for the site. Although to date the wall clocks are still wrong however. But thats down to PFI at that site also.
Looking at using active wifi RFID(RTLS) tags could as it would just be as simple as pressing the button on the tag, that would then update a record accordingly. However I guess you want more than that.