Back in 1998 I was called to sort out a fetal monitor that was "Flashing it's lights".
On entering the delivery room I noticed the unit repeatedly doing full startup lights checks.
After a minute of gazing in amazement I realized it was doing the resets in sychronisation with the mumblings fronm the woman's husband who was slouched in a corner talking to himself.
A closer look revealed that he was in fact on his mobile telling friends & familly the good news. I asked him to turn the phone off & the fault cleared.
So they definitely do interfere. However the most likely result is what I observed, a system crash. In recent years there has been a very significant increase in items being sent for test because they "keep alarming". These almost always pass test with ease. I do wonder how many of these incidents may be induced by phones.
Also of concern to me are the major phone company systems being planted on hospital rooves as money earners, the cordless systems going into wards and those darned walkie-talkies security & portering carry.
Marc
