Qn#(b)(4).Conclusion: the complaint was confirmed, but the root cause could not be identified.A video was received as part of the complaint information.The video shows a circuit under water and it can be observed bubbles between the jar & water trap that appears to have a leak between both components.The device history record of batch number 74a1602675 has been reviewed and no issues or discrepancies were found which could potentially relate to this complaint.No non conformance reports were originated for the lot in question that can be associated to the complaint reported.Dhr shows that the product was assembled & inspected according to our specifications.Customer complaint is confirmed based on video provided that shows a circuit that appears to have a leak between the jar and the water trap.However, physical sample is necessary to conduct a proper investigation and determine the source of defect reported.If device sample becomes available at a later date this complaint will be updated.
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Qn#(b)(4).The sample was returned for evaluation.A visual exam was performed and no tube melting or charring was detected.The entire circuit was leak tested.In order to thoroughly capture all leaks, if any, both limbs of the circuit were submerged under a bath of plain tap water to see if any bubbles could be detected from leaks.Immediately leaks were detected at both rain trap cups, one on the inspiratory limb, the other on the expiratory limb.The leaks were coming from where the collection cup attaches by plastic threads to the rain trap base.These leaks were so profuse an acceptable rate of leak volume was unobtainable.Based on the investigation performed, the reported complaint was confirmed.The returned circuit was confirmed to leak from the expiratory and inspiratory limb water traps.A dhr review was performed on the product with no evidence to suggest a manufacturing related cause.All circuits are 100% inspected for leaks at the time of manufacturing; therefore, any defects would be detected prior to release.This defect was discovered during preliminary testing (prior to use), sst testing on a ventilator.Other remarks: based upon the time of discovery and the damage observed on the returned sample, it was determined that operational context caused or contributed to this event.
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