Result: the penumbra system max aspiration pump 220 (pump max) was able to power up and reach fully adjustable vacuum.The pump max was opened by a penumbra engineer and corrosion was observed on the outlet cylinder piston crown.Conclusion: evaluation of the device revealed that the 5max was kinked in multiple locations, and fractured.If the device is forcefully manipulated against resistance, damage such as this may occur.Evaluation of the pump max revealed it was able to power up and reach full vacuum.Further evaluation revealed corrosion was present on the piston crown inside the outlet cylinder.This corrosion likely caused the piston to seize and prevented the pump from generating vacuum pressure.The seized piston may have become jarred loose during transit back to penumbra facilities.Penumbra pumps are visually and functionally inspected during incoming quality inspection.Penumbra catheters are inspected during in-process inspection and during quality inspection after manufacturing.The manufacturing records for this lot were reviewed and did not reveal any outstanding discrepancies, design, or quality concerns.This report is associated with mfr report number: 3005168196-2017-00349.
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The patient was undergoing a thrombectomy procedure in the m2 section of the middle cerebral artery (mca) using a penumbra system 5max reperfusion catheter (5max) and a penumbra system aspiration pump max 220v (pump max).During the procedure, the physician attempted to remove thrombus for the first and second pass using a stent retriever device and a 5max; however, the thrombus was pulled proximal and no reperfusion was achieved.The stent retriever was then removed, another stent device was advanced with the 5max for the third pass; however, no reperfusion was achieved.Therefore, the stent retriever and 5max were removed.Upon removal, the physician noticed that the 5max was broken in two pieces.The 5max was then disconnected from the pump max and a neuron max 6f 088 (neuron max) was connected to the pump max; however, only slow reversal flow occurred.Upon checking the pump max, the physician noticed that no vacuum was detected.It was also reported that the pump max intermittently did not produce enough vacuum during the first, second and third pass.The physician then performed manual aspiration with a 20 ml syringe and an angiography.According to the physician, in consequence of the prolonged intervention, an acute stent thrombosis of the prior implanted 7 x 40 mm carotid-wallstent with slight neurological deterioration occurred.In addition, dissection of the proximal m2 with subarachnoid hemorrhage (sah) occurred by the three thrombectomy attempts.
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