Result: there was no visible damage to the exterior of the penumbra aspiration pump (pump).The pump was plugged in and powered on.The pump only made a humming sound like a fan was running.A burning smell was observed after approximately 5 minutes of the pump being on.However, the pump was powered on for further evaluation at a later instance, and functioned as intended.Conclusion: evaluation of the returned pump revealed that upon powering on, a humming noise was heard, but no vacuum pressure could be created.A burning smell was observed after approximately 5 minutes of the pump being on.The pump was powered on for further evaluation at a later instance, and functioned as intended.The pump did not work properly in all instances and, therefore, the pump was nonfunctional.The root cause of this complaint cannot be determined.Pumps are 100% functionally tested during incoming quality inspection.The manufacturing records for this lot were reviewed and did not reveal any outstanding discrepancies, design, or quality concerns.
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