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As reported by the field clinical specialist (fcs), during a transfemoral transcatheter aortic valve replacement (tavr) procedure using a 29 mm sapien 3 valve, the 29 mm commander delivery system balloon ruptured at the end of inflation.Blood was seen in the syringe.The valve was noted to have deployed appropriately and was expanded.A post-dilation was not needed.There was difficulty withdrawing the delivery system through the 16fr esheath+, and a vascular cutdown was performed to remove the system.The perceived root cause of the balloon rupture was reported to be annular calcium.
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A supplemental report is being submitted for correction and to include additional information from the investigation.The following sections of this report have been corrected/updated: h6 (type of investigation, investigation findings, investigation conclusions) and h11 (additional narrative/data).The events reported are anticipated in the risk management documentation for transcatheter heart valve procedures.A previous investigation into this type of event is captured in an edwards lifesciences technical summary and applies to this complaint.Additional assessment of the failure modes is not required at this time.The device was not returned for evaluation as it was discarded.Due to the unavailability of the device, no visual inspection, functional testing, or dimensional analysis could be performed.There was imagery received for evaluation.Per imaging evaluation, calcification was present in the landing zone.Per the technical summary, the instructions for use (ifu), training manuals and current risk mitigations have been reviewed.No inadequacies have been identified with regards to warnings, contraindications, and the directions/conditions for the successful use of the device.Through extensive complaint investigations, balloon burst events during valve deployment have not been associated with device malfunctions or manufacturing nonconformances.Rather, the root cause of these events has historically been due to calcification in the landing zone or over-inflation of the balloon.The complaint for the balloon burst has been confirmed based on the information available to date.Any updates or additional findings will be submitted in accordance with fda reporting requirements.In this case, the available information suggests that patient factors (calcification) likely contributed to the event.The perceived root cause of the balloon rupture was annular calcium, and review of the provided imagery confirmed the presence of calcification within the landing zone.Calcification can create a challenging anatomy for balloon inflation.While the balloons are sufficiently designed and tested to ensure the burst pressure is at or above the rated burst pressure, calcified nodules can compromise the structure of the balloon wall via the following mechanisms such as puncture, local overstretching, open cell impingement, or stress concentration.Regarding the difficulty withdrawing the delivery system which required surgical intervention, this complaint has also been confirmed based on the information available to date.Any updates or additional findings will be submitted in accordance with fda reporting requirements.In this case, the available information suggests procedural factors (withdrawal of a burst balloon) likely contributed to the event.As the balloon burst, the altered balloon profile could have made it more susceptible to catching on the distal end of sheath tip, which could have led to the observed withdrawal difficulty.Complaint histories for all reported events are reviewed against trending control limits on a monthly basis, and any excursions above the control limits are assessed and documented as part of this monthly review.Since no edwards product defects or labeling deficiencies were identified, no corrective or preventative action is required.
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