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Because device was not returned to ok biotech, therefore, we were unable to perform further testing on the suspected device.Ok biotech reviewed the manufacturing record of this suspected device (meter serial number # (b)(4)), and the meter was qualified and released by the quality control department and shipped to (b)(4) on 05/26/2015.The strip lot # d160720-1 was manufactured on 07/20/2016 and expired in 07/2018.Ok biotech received no complaints from same manufacturing batch of strips.We tested the retain strips test of same batch#d160720-1 with in house meter and control solution.The control solution tests for level low were 59/61 mg/dl; for level high were 230/228 mg/dl.The request control solution ranges are: level low 30~80 mg/dl; level high 190~290 mg/dl.All results were within the acceptance range.Pass.We are unable to confirm the complaint because device was not returned and no further information from customer has been received, this matter has to be closed out with undetermined root cause.
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