(b)(4).Method: the complaint rt202 adult inspiratory heated breathing circuit is not returned to fisher & paykel healthcare for evaluation.We were unable to obtain further information from the customer despite our several attempts.Our investigation is thus based on the initial information reported by the customer and our knowledge of the product.Results: the customer reported that the inspiratory limb disconnected from the chamber.Conclusion: without the complaint device, we were unable to determine conclusively the cause of the reported event.All rt202 adult inspiratory heated 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.The user instructions that accompany the rt202 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.
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