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(b)(4).Investigation - evaluation a review of the complaint history, drawings, device history record, instructions for use (ifu), manufacturing instructions, trends, and quality control of the device was conducted during the investigation.The device is shipped with an instruction for use (ifu) that describes the intended use, specific items are addressed such as: warnings: before withdrawing the sheath through tortuous anatomy, insert the introducer dilator to avoid possible breakage.Precautions: when inserting, manipulating, or withdrawing a device through an introducer always maintains introducer position.Do not attempt to insert or withdraw the wire guide and/or introducer if resistance is felt.Sheath introduction: upon removal from package, ensure the inner diameter (id) of the introducer is appropriate for the maximum diameter of the instrument or catheter to be introduced.Insert the dilator completely into the introducer.Insert wire into the vessel through the needle, then remove needle, leaving the wire guide in place.Insert dilator/sheath combination over wire guide.Remove wire guide and dilator, aspirate and flush introducer side-arm.Insert appropriately sized device as needed.Sheath removal: insert wire guide at least 10cm past the tip of the sheath.Insert the dilator over the wire into the sheath.Withdraw the sheath and dilator as a unit.Remove the wire guide." it also states, "upon removal from package, inspect the product to ensure no damage has occurred.¿ the complaint device was not returned therefore, no physical examinations could be performed; however, a document based investigation evaluation was performed.There is no evidence to suggest the product was not made to specifications.Review of device history record shows no nonconforming events which could contribute to this failure mode.It should be noted there were no other reported complaints for this lot number.Based on the information provided, no product returned and the results of our investigation, it is unclear whether the patient's condition, the procedure/user technique, or the manufacturing of the device contributed to the reported failure mode.A definitive root cause could not be determined.If a complaint device or further information is received, the complaint will be re-evaluated and updated as necessary.We will continue to monitor for similar complaints.Per the quality engineering risk assessment no further action is required.
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