The scrub team switched on the pso 4000 as usual and prepared a catheter pso ptt for zeroing.The screen was flashing connect catheter as usual.When the scout nurse connected the catheter the pso 4000 did not recognise that they had plugged it in and kept flashing connect catheter.This was tried several times and rep then advised them to turn off and restart monitor and plug the catheter back in for zeroing.This didn't resolve the situation so the rep advised another catheter to be opened.The same problem still persisted with a second catheter.The unit also started to go blank screen and restart on its own.The patient was kept in theatre for an additional 45 minutes while another monitor was taken to be used instead.
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