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The complaint could be confirmed, since the product was returned for evaluation and matches the alleged failure.The device inspection revealed the following: visual examination of the received product shows that the instrument is in a very bad condition with scratches, dent and deformations.By the adjustment mechanism and in the sleeve are some red foreign substance visible.Furthermore, the hinge is in a really bad condition with black foreign substance (sticky) and deformation, from use.In addition, microscopic investigation has shown that there are clear indications that the radially riveted (flanged) got damaged after manufacturing and based on that was able to fall off, visible as based on the cone from radially riveted process, and burr which is a result of continuously mechanical force to the radially riveted from use.Functional examination of the received product shows that the instrument was received with completely blocked adjustments mechanism in far short condition, with force we were able to unblock the instrument.Furthermore, we are able to confirm that the hinge can be disassembled, as the sleeve can be removed and based on that the hinge will fall apart.All measure results are within accuracy.A review of the device history for the reported lot did not indicate any abnormalities.No corrective actions are required at this time.100% of the lot got check for hinge function.A review of the labeling did not indicate any abnormalities.No indications of material, manufacturing or design related problems were found during the investigation.Based on investigation, the root cause was attributed to a use related issue.The failure was caused most likely the collapse of the radially riveted as result of continuously mechanical force.If more information is provided, the case will be reassessed.
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