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Update to d9, h6 and h10 to reflect device evaluation.The commander delivery system was returned to edwards for evaluation.Visual inspection revealed the following: radial and longitudinal balloon tear, originating from the working length of the balloon to the proximal should of the balloon.There were no missing balloon pieces.Functional testing was not able to be performed due to the nature of the complaint.Dimensional testing was performed on the inflation balloon single wall thickness along the edges of the burst location as were found to be within specification.During the manufacturing process, the entire device is visually inspected, and tests are performed throughout the process.In this case, there is no evidence to support a manufacturing design defect potentially contributed to the complaint.A device history record (dhr) review was performed and did not reveal any manufacturing non-conformances that would have contributed to the complaint event.A review of edwards lifesciences risk management documentation was performed for this case.The reported event is an anticipated risk of the transcatheter heart valve procedure, additional assessment of the failure mode is not required at this time.The complaint for balloon burst was confirmed by visual inspection of the returned device as well as returned imagery.However, no manufacturing non-conformance was identified during the evaluation.Dimensional inspection of the returned balloon revealed that the balloon wall thickness was within specification.No visual abnormalities were observed on the returned sample.An edwards lifesciences technical summary has been documented for root cause analysis on balloon bursts in a calcified landing zone.The technical summary provides a rationale as to why it is unlikely that a product defect or manufacturing non-conformance contributed to this type of event, including factors on why deployment of balloons on thv delivery systems are subject to increased risk of burst in a calcified landing zone.Per report calcium at the landing zone was moderate.The presence of calcification can create a challenging anatomy for balloon inflation.While the balloons are sufficiently designed and tested for rated burst pressures well above their inflation pressure, calcified nodules can compromise the structure of the balloon wall via following mechanisms such as puncture, local overstretching, open cell impingement, or stress concentration.Additionally, it was noted that an additional volume of 2cc was added to the balloon.The prescribed nominal inflation volume is provided in the ifu that was documented in the technical summary.It is possible the balloon was overinflated, subjecting the balloon to pressures high enough to cause the balloon to burst.In addition, the technical summary outlines the extensive manufacturing mitigations in place to prevent this type of malfunction (visual and dimensional inspections, leak testing, and functional balloon burst testing that occurs with every manufactured lot).These inspections and testing further support that it is unlikely that a defect present in manufacturing contributed to the complaint.The technical summary also outlines the instructions for valve deployment.It should be noted that these mitigations are still in place.In this case review of available information suggests that patient factors (calcification) contributed to the balloon burst.Complaint histories for all reported events are reviewed against trending control limits monthly, and any excursions above the control limits are assessed and documented as part of this monthly review.No ifu/labeling/training manual inadequacies were identified.No corrective or preventative action nor product risk assessment is required.
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