(b)(4).
The device was not returned for analysis.
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 similar incidents from this lot.
It was reported that negative pressure was held for 5 seconds prior to retracting into the guide catheter.
It should be noted in the xience prime everolimus eluting coronary stent system (eecss), instructions for use (ifu) specifies: deflate the balloon by pulling negative on the inflation device.
Larger and longer balloons will take more time (up to 30 seconds) to deflate than smaller and shorter balloons.
Confirm balloon deflation under fluoroscopy and wait 10 ¿ 15 seconds longer.
It is unknown if the ifu deviation contributed to the reported event.
The investigation was unable to determine a conclusive cause for the reported difficulties.
There is no indication of a product quality issue with respect to manufacture, design or labeling.
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It was reported that the procedure was to treat a moderately calcified, heavily tortuous, de novo lesion in the left anterior descending (lad) artery.
A 3x33mm xience prime drug eluting stent (des) was advanced to the target lesion and implanted without issue with one inflation at 10 atmospheres (atm).
During removal, negative pressure was held for 5 seconds, however the balloon failed to deflate and was removed fully inflated from the anatomy with difficulty.
There was no adverse patient effect and no clinically significant delay in the procedure.
No additional information was provided.
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