(b)(4).The sample was returned for evaluation.A visual exam was performed it was observed that the product was detached.Ten pieces of the same catalog number were taken from production at the manufacturing facility and inspected for the reported defect.No defects were identified.In addition, all ten pieces passed leak testing and pull testing.A device history record review was performed and no relevant findings were identified.Based on the visual exam of the returned product, the reported complaint was confirmed.Improper assembly of the product can be the reason why the product can be easily detached.Improper assembly can also make the product fail the leak test.In the current manufacturing procedure, 100% leak testing during the assembly process and 100% visual testing at the packing area is conducted; thus, any defective product will be detected prior to release from the manufacturing facility.It is very likely the detachment was caused by mishandling of the product during usage; although, this could not be confirmed.
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