(b)(4).Evaluation summary: the device was returned for evaluation.The reported winged folds and difficulty to remove were confirmed.The reported difficulty to insert could not be replicated due to the condition of the returned device.Based on analysis of the returned device, there is no indication of a product deficiency.A review of the lot history record revealed no non-conformances for the reported lot.A query of the complaint handling database revealed no other similar incidents reported from this lot.It should be noted that the non-compliant (nc) trek instructions for use (ifu) states that the nc trek rx coronary dilatation catheter is 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 and balloon dilatation of a stent after implantation (balloon models 2.00 mm x 5.00 mm only).Based on the information reviewed, there is no evidence to indicate the presence of a product deficiency.
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