Investigation ¿ evaluation: the stent was not returned for analysis and there were no photographs provided; therefore, a physical investigation could not be performed.Without the part number, lot number or the returned device a specific root cause cannot be determined.The lot number was not provided therefore a review of the device history record was unable to be performed.If the device and lot number information are received a review of complaint history for related complaints will be reviewed.No information or materials have been received that will allow comprehensive investigation of this complaint.Per the quality engineering risk assessment; without the product information, the need for corrective actions is not able to be determined.Cook medical has notified the appropriate personnel and the will continue to monitor this device via the complaints database for similar complaints.
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