(b)(4).Date of event is unknown.Investigation summary: a device was returned sterile for evaluation.Visual inspection and functional testing were conducted on the returned device.Upon visual analysis of the returned sample, it was determined that the el5ml device was returned inside its unopened package.Upon visual inspection, it was observed that the blister was found to be slightly scratched from a corner and the tyvek was noted to be damaged (groove).The damage was noted to be on the outside of the tyvek.The damage found compromised the device sterility.The reported event is confirmed.It should be noted that product failure is multifactorial.Due to the damages found on the packaging, a possible cause for this condition is due to improper handling during transit or storage.It appears that the package hit a hard surface and this caused the reported event.Please reference the instructions for use for more information.As part of our quality process all devices are manufactured, inspected, and released to approved specifications.Additional complaint information monitoring for potential safety signals is conducted through complaint trending as part of post market surveillance.A manufacturing record evaluation was performed for the finished device lot number, and no non-conformances were identified.
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