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It was reported that the procedure was performed to treat a lesion in the right coronary artery (rca) ostium with mild calcification, no tortuosity and 70% stenosis.An unspecified stent was implanted and post dilation was performed by the 4.5x20mm non-compliant (nc) trek balloon dilatation catheter (bdc).The balloon was inflated twice to 16 atmospheres (atm).Upon deflation, the device was held negative for a normal amount of time; however, the balloon only deflated about 20% and remained stuck in the coronary artery.Two attempts to deflate the balloon with two different non-abbott inflation device, before resorting to manual deflation with a syringe.The patient experienced a temporary inferior st elevation which resolved itself upon device removal.No additional information was provided.
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The device was not returned for analysis.Production record and corrective and preventative actions (capa) reviews were performed and revealed no indication of a product quality issue.Additionally, a query of the complaint handling database for the reported lot revealed there is no indication of a lot specific issue.It was reported that the contrast mix used in the procedure was 60/40 saline/contrast.It should be noted that the coronary dilatation catheters (cdc), nc trek rx, global instructions for use (ifu) specified that the contrast is 60% contrast medium diluted 1:1 with normal saline.In this case, since a 60% saline to 40% contrast ration was used and is less contrast concentration than the required percentage, it is unknown if the ifu violation caused or contributed to the reported complaint.Based on the information provided, a definitive cause for the reported deflation issue could not be determined; however, the reported difficulty removing the device and unexpected medical intervention appear to be related to circumstances of the procedure.A conclusive cause for the reported patient effects of non-specific ekg/ecg changes and the relationship to the device, if any, cannot be determined.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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