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Visual inspection was performed on the returned device.The reported separation was confirmed.The reported deflation issue could not be replicated in a testing environment due to the condition of the returned device.The reported difficulty to remove could not be replicated in a testing environment as it was based on operational circumstances.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.A review of the complaint history of the reported lot revealed similar complaints from this lot.The investigation determined the reported deflation issue appears to be related to a potential product quality issue.The issue is being addressed per internal operating procedures to evaluate the reported deflation issues.Abbott vascular will continue to trend the performance of these devices.Although a definitive cause for the reported deflation issue could not be determined, the issue is being addressed per internal operating procedures to perform a manufacturing evaluation due to the reported deflation events from this lot.The reported difficulty removing the device from the anatomy and/or stent, the unexpected medical intervention, foreign body in patient, hypotension and obstruction/occlusion appear to be related to circumstances of the procedure.The reported separation appears to be user/operational context related.Based on the clinical review, it can be definitively stated that the nc trek was an indirect contributing factor in this patient¿s death.The force used in the attempts to remove a partially deflated balloon dilation catheter caused the balloon to fracture and separate.This action caused the balloon to become lodged in either the left main or the left circumflex artery, which occluded the blood flow to the vessel and ultimately led to the cascading events that, in combination with the patient's age and comorbidities, was a direct cause this patient¿s death.H6: investigation conclusions code 4315 removed.
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Visual inspection was performed on the returned device.The reported separation was confirmed.The reported deflation issue could not be replicated in a testing environment due to the condition of the returned device.The reported difficulty to remove could not be replicated in a testing environment as it was based on operational circumstances.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 of the reported lot did not indicate a lot specific quality issue.It was reported by the account that the balloon was removed partially inflated.It should be noted the coronary dilatation catheters (cdc), nc trek rx, global, instruction for use (ifu) states: withdraw the deflated dilatation catheter and guide wire from the guiding catheter through the hemostatic valve.In this case, it is likely that the ifu violation contributed to the reported difficulty removing the device.Additionally, the account reported that force had to be use to remove the device.It should be noted that the coronary dilatation catheters (cdc), nc trek rx, global, ifu stated: if resistance is felt, determine the cause before proceeding.Continuing to advance or retract the catheter while under resistance may result in damage to the vessels and / or damage / separation of the catheter.In this case, it is likely that the reported force used resulted in the separation.The investigation was unable to determine a conclusive cause for the reported deflation issue; however, the reported difficulty removing the device from the anatomy and stent, the unexpected medical intervention, foreign body in patient, hypotension and obstruction/occlusion appear to be related to operational context.The reported separation appears to be related to user error/operational context and the patient death appears to be related to the device.Based on the information provided, it can be definitively stated that the nc trek was an indirect contributing factor in this patient¿s death.However, the force used in the attempts to remove a partially deflated balloon dilation catheter caused the balloon to fracture and separate.This action caused the balloon to become lodged in either the left main or the left circumflex artery, which occluded the blood flow to the vessel and ultimately led to the cascading events that, in combination with the patient's age and comorbidities, was a direct cause this patient¿s death.The reported patient effects of obstruction/occlusion, hypotension and death/expired are listed in the coronary dilatation catheters (cdc), nc trek rx, global, ifu as known patient effects.Based on the information reviewed, there is no indication of a product quality issue with respect to manufacture, design or labeling.A cine was received and reviewed by an abbott vascular clinical specialist.This was a case to treat a heavily calcified left main (lm) and left circumflex artery (lcx) in a 90-year-old male patient.The patient had a previous medical history of multiple comorbidities, including a coronary artery bypass graft (cabg) of the right coronary (rca) and left anterior descending (lad) arteries; they had also been previously refused percutaneous coronary intervention (pci) and were not a surgical candidate.Given the dimensions of the balloon, it is unknown to what atm or how long this nc trek balloon dilatation catheter (bdc) was inflated for, nor how long the deflation time was.If a bdc is not allowed enough time to fully deflate before attempting to remove the balloon, the balloon catheter can be ¿necked¿ or kinked, which will cause the inflation/deflation lumen to become obstructed and not allow any of the contrast media to be injected or removed from the balloon.Attempting to forcefully remove an inflated or partially inflated balloon from a vessel can cause damage to the vessel, a newly placed stent, and cause the catheter to fracture and separate.Due to the information provided, it can be definitively stated that the nc trek was most likely an indirect contributing factor in this patient¿s death.This medical review will be updated as needed if additional information is received.This medical review update is required to add additional information recently received.It was reported that the nc trek was inflated twice to 18 atms.After the second inflation, an attempt to deflate the balloon was unsuccessful.The deflation time was not reported; however, it was reported that the balloon was noted to be partially deflated.The nc trek was pulled forcefully, causing the balloon to fracture and separate from the dilatation catheter.It is unknown if the balloon occluded the left main (lm) or the left circumflex artery (lcx).The operator attempted to snare the retained balloon but was unsuccessful.When the patient decompensated, an impella left ventricular assist device was inserted.The proximal portion of the dilatation catheter was returned, but the balloon was not returned.Upon inspection, it was noted that the outer member was separated and that the material at the separation was stretched and jagged, indicating extreme force.The support skive/wire/bayonet and shaft were kinked distal to the outer member to hypotube seal.Additionally, multiple bends and kinks were noted throughout the hypotube, indicating the extreme force applied to the proximal portion of the dilatation catheter.Due to the information provided, it can be definitively stated that the nc trek was an indirect contributing factor in this patient¿s death.However, the force used in the attempts to remove a partially deflated balloon dilation catheter caused the balloon to fracture and separate.This action caused the balloon to become lodged in either the left main or the left circumflex artery, which occluded the blood flow to the vessel and ultimately led to the cascading events that, in combination with the patient's age and comorbidities, was a direct cause this patient¿s death.
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