(b)(4).Event evaluation: a review of complaint history, device history record and instructions for use (ifu) was conducted during the investigation.The product or medical imaging was provided for review; however, the sizing worksheets were provided.The device history record was reviewed and was without indication of a quality issue.The zenith device has completed design control requirements demonstrating that the device meets the predetermined requirements and that the requirements meet the needs of the user.Specifically, design verification testing included water permeability testing, migration resistance testing, and radial force testing.The results met the acceptance criteria.The ifu provides instructions for use, contraindications, warnings and precautions regarding the appropriate method of use.Specifically, it states "additional endovascular interventions or conversion to standard open surgical repair following initial endovascular repair should be considered for patients experiencing an enlarging aneurysm, unacceptable decrease in fixation length (vessel and component overlap) and/or endoleak.An increase in aneurysm size and/or persistent endoleak or migration may lead to aneurysm rupture.Patients experiencing reduced blood flow through the graft limb and/or leaks may be required to undergo secondary interventions or surgical procedures." based on the information available about the observed endoleak, no definitive conclusion can be reached about the cause for this event.The appropriate internal personnel will be notified and we will continue to monitor for similar complaints.Based on the risk assessment performed, no additional actions are required at this time.
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