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As reported by an edwards lifesciences field clinical specialist, during deployment of a 29mm sapien 3 ultra resilia valve in the aortic position, the commander delivery system balloon burst.However, the valve appeared fully deployed.A new commander delivery system was prepared to post dilate the valve.However, the second commander delivery system balloon also ruptured.Tte showed no paravalvular leak and a well-deployed valve with a mean gradient of 3mmhg.There was no patient injury.The patient was stable and discharged.Per the reporter, the perceived root cause of the balloon bursts is unknown but possibly could have been due to calcium in the left ventricular outflow tract.
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A supplemental mdr is being submitted for correction and additional information based on the engineer evaluation.The following sections of this report have been updated: additional codes added to h6 type of investigation, corrected h6 investigation findings, and corrected h6 investigation conclusions.The event reported is 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 mode is not required at this time.The device was discarded and not returned for evaluation.Due to the unavailability of the complaint device, engineering was unable to perform any visual inspection, functional testing, or dimensional analysis.Imagery was provided, and the following was observed: presence of calcification 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 delivery system balloon burst was empirically confirmed based on the sample image and the reported event resembled the investigation documented in the technical summary.Available information suggests that patient factors (calcification) likely contributed to the reported event as imaging review confirmed the presence of calcification in 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 following mechanisms such as puncture, local overstretching, open cell impingement, or stress concentration.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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