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(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.(b)(4).The device was not returned for evaluation.It should be noted that the instructions for use (ifu) states: trek rx coronary dilatation catheters are indicated for balloon dilatation of the stenotic portion of a coronary artery or bypass graft stenosis, for the purpose of improving myocardial perfusion, balloon dilatation of a coronary artery occlusion, for the purpose of restoring coronary flow in patients with st-segment elevation myocardial infarction.In this case, it is unknown if the reported ifu violation caused or contributed to the reported complaints.The reported patient effect of air embolism is listed in the trek rx ifu, as a known patient effect.The investigation was unable to determine a conclusive cause for the reported balloon rupture; however, the reported patient effects of air embolism and transient ischemic attack appear to be related to circumstances of the procedure.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Additionally, a review of the complaint history identified no other similar incidents from this lot.There is no indication of a product quality issue with respects to the design, manufacture, or labeling of the device.
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