Health Canada — Medical Devices · Canada · 2016-04-29 · Type II
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Reported risk: Draeger has become aware of situations where the error message "poti unplugged" was generated. In these cases, an acoustic and visual alarm is generated, the breathing system releases pressure and the ventilation function stops operating. Draeger's investigation showed that the error message is caused by increased electrical contact resistance of the controllers (adjustment potentiometers). The increased resistance is the result of an oxide layer on the controllers, which accumulates over a long period of time. This oxide layer can only accumulate if the controllers are moved rarely or never. Draeger's product monitoring has shown that some users rarely use the controller or do not use it at all.
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