(b)(4).Method: the inspiratory circuit of the complaint rt380 evaqua2 breathing circuit was returned to fisher & paykel healthcare new zealand and was visually inspected.Result: the visual inspection revealed that the inspiratory limb was returned with the elbow and patient end connector loose.Conclusion: we were unable to determine conclusively the cause of the reported event.However, it is possible that the circuit was cleaned and reused which could lead to the reported event.All rt380 breathing circuits are visually inspected and pressure tested for leaks before releasing for distribution.Any breathing circuit which fails any of these tests is discarded.If any faults are detected the whole batch is placed on hold for investigation.This suggests that the damage occurred after the product was released for distribution, during transportation or storage.The user instructions that accompany the rt380 breathing circuit state the following: - check all connections are tight before use.- set appropriate ventilator alarms.- do not soak, wash, sterilize, or reuse this product.Avoid contact with chemicals, cleaning agents, or hand sanitizers.- reuse may result in transmission of infectious substances, interruption to treatment, serious harm or death.
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