The product was analyzed and it was determined that only a portion of the product was returned.There were no indications of material or manufacturing defects.An investigation was performed on the basis of complaint statistics.The complaint percentage was calculated, and it is determined that the complaint percentage falls within the design risk limits adhered to at klm.During the investigation the product lot number identified was reviewed in the device history records.The dhr review showed no discrepancies or anomalies.The failure root cause cannot be determined due to no device being returned.If further information is obtained that might add value to the contents of the investigation report, an additional follow-up report will be submitted.Updated lot number.Updated manufactured date.
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