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During a retrospective complaint review, devilbiss healthcare identified an oxygen concentrator with complaint of "low o2 purity." there was no report or evidence of illness, injury or medical treatment associated with the complaint.Devilbiss evaluated the unit and determined that the root cause of the condition was normal wear of the sieve beds and compressor cup seals, which were replaced.The power loss alarm was also found to be not operating to specification, and the pc board was also replaced.Devilbiss implemented a capa for the pc board power loss alarm issue.
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