(b)(4).This case was reviewed and investigated according to the manufacturer's policy.Attempts to obtain patient information was unsuccessful.Attempts to obtain the patient information were made via email and phone.The implant or explant dates are not applicable to this device.The returned device was visually and microscopically inspected.The device was returned stuck within an angiographic catheter.A 114 mm section of the proximal shaft and core wire were cut with the microcables missing; a 101 mm section consisting of the a portion of the proximal shaft, the luer, and connector cable were cut; the distal shaft was torn 31 mm from the distal tip.The core wire was protruding from the device 46 mm from the proximal end of the distal portion of the device.The proximal fillet was lifted, but intact with no portions missing.There were several striations around and along the distal shaft and scanner.The probable cause of the reported movement failure is damage during pullback as evidenced by the puncture on the distal shaft and lifted proximal fillet.The puncture is the likely result of the device being pulled against the guidewire while the device was stuck.Strain, impact, and forces associated with use can affect the integrity of the device.There was no damage observed on the device that could contribute to the reported failure.It could not be conclusively determined when the cause of the failure occurred.The customer stated that the core wire was exposed following intervention.The probable cause of the exposed core wire is user induced damage during intervention as evidenced by the cuts on the device.As the core wire is anchored within the luer, intentionally severing the device distal to the luer may result in core wire becoming unstable within the device.The instructions for use (ifu) cautions if resistance is encountered during pullback, remove the entire system (guide wire, ivus catheter, sheath/guide catheter) at the same time.Do not advance the guide wire against significant resistance.If binding occurs between the catheter and the guide wire while inside the patient, carefully remove both the wire and catheter and do not use.The manufacturing documentation for this device was reviewed and the device met all quality and manufacturing release criteria.There were no nonconforming material reports or deviations noted that would contribute to the reported failure mode.This complaint will be monitored as part of complaint data analysis.
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