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The device was not returned for evaluation.Production record and corrective and preventive actions (capa) reviews were performed and revealed no indication of a product quality issue.Additionally, a review of the complaint handling database did not indicate a lot specific quality issue.A conclusive cause for the reported difficulties could not be determined; however, the subsequent unexpected medical intervention and foreign body in patient appear to be related to the operational context of the procedure.Factors that could contribute to failure to advance include, but are not limited to, patient anatomical morphology, patient disease state, pre-dilatation strategy, device placement technique, interaction with previously placed stents or accessory devices.Stent dislodgement may be attributed to several factors including, but not limited to, improper or inadequate crimping at the time of manufacture, incorrect sheath sizing, positive pressure during preparation, forced sheath removal, handling of the stent during preparation, interaction with the anatomy, or interaction with accessory devices.Factors that can contribute to difficult to remove include, but are not limited to, anatomical conditions, guiding catheter lumen obstructions, kinks, bends, procedural technique, insufficient support, or interactions with other devices.In this case, it is possible the device may have interacted with the heavily calcified, heavily tortuous lesion during advancement, causing the reported failure to advance.Further interaction with the challenging anatomy during retraction of the device, as resistance was reported, may have contributed to the reported difficult to remove, ultimately causing the reported stent dislodgement; however, without the device to examine, this cannot be confirmed.The stent became embedded in a heavily diseased area of the proximal left anterior descending coronary artery extending into the left main.Unsuccessful attempts were made to retrieve the stent with a snare.An unspecified abbott balloon was used to complete the procedure and the patient was transferred in stable condition to another facility for stent retrieval.There is no indication of a product quality issue with respect to manufacture, design, or labeling; therefore, no product-related corrective action will be implemented in this case.
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