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(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.A visual inspection was performed.The reported balloon rupture was confirmed.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot and relabeled lot that would have contributed to this event.Additionally, a review of the complaint history identified no other similar incidents reported from this lot.The investigation was unable to identify a conclusive cause for the retorted balloon rupture.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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