Investigation x-inspect returned samples.Analysis and findings: complaint (b)(4).Distribution history: this complaint unit was manufactured in 2003 and shipped 3/31/2004.Manufacturing record review: a review of the device history record could not be performed as the record could not be located at the time of this investigation.However, it should be noted at the time of manufacture records from each lot are thoroughly reviewed to ensure that products are released meeting all coopersurgical quality release specifications.Should the device history record be located going forward, it will be reviewed, and this complaint amended accordingly.Incoming inspection review: not applicable.Service history record: this unit was returned to csi and updated its diaphragm.Historical complaint review: a review of the 2-year complaint history showed one similar reported complaint condition.Product receipt: the complaint unit was returned on repair log 94251.Visual evaluation: visual examination of the complaint unit revealed no physical damage.Functional evaluation: complaint unit was functionally evaluated and found not to function properly.Service & repair confirmed the complaint unit had a low output, but within calibration.Root cause: these units can go out of adjustment with use over time.A root cause has not been definitively determined, however, give the service time of this unit this issue is being attributed to wear and tear.Correction and/or corrective action : the unit's output values were adjusted to optimal range, tested to specifications and returned to the customer.Coopersurgical will continue to monitor this complaint condition for trends.No further corrective action is necessary.No further training required at this time.Preventative action activity: coopersurgical will continue to monitor this complaint condition for trends.
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