An investigation was performed using a stereo microscope revealed surface damage.Further observation determined there were no indications of material or manufacturing defects.The complaint percentage was calculated, and it is determined that the complaint percentage falls within the design risk limits adhered to at klm.The review of the device history records was not possible due to no lot number being identified.The root cause cannot be determined due to no device failure detected or described.If further information is obtained that might add value to the contents of the investigation report, an additional follow-up report will be submitted.
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