Results: evaluation of the attached photographs shows several tubes, one with the correct amount of gel but with an air bubble in the gel, two with twice the amount of gel, and two with no gel.No similar defects were identified in the (b)(4) retained samples from this lot number.A review of the device history record revealed no irregularities during the manufacture of the reported lot #7067956.Conclusion: bd was able to confirm the customer¿s indicated failure modes with the photographs provided.The most likely root cause for the reported defect is that a tube already containing gel was used to either infill a space or replace a defective tube prior to the gel dispense process, resulting in a tube with twice the required amount of gel.The empty tubes were probably infilled by mistake after the gelling stage, whilst the bubble would have been caused by air in the dispense system.
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