(b)(4).The rt228 infant breathing circuit is not sold in the usa but is similar to a product that is sold in the usa.The 510(k) for the similar product is k020332.Method: the complaint rt228 infant breathing circuit was returned to fisher & paykel healthcare (f&p) in (b)(6) for evaluation, where it was visually inspected by a trained f&p technician.Results: the pressure line port cap was returned with the complaint rt228 circuit.The pressure line port cap was able to be reattached to the pressure line port.Conclusion: we are unable to determine the cause of the reported event.The user instructions that accompany the rt228 infant breathing circuit state the following: check all connections are tight before use.Ensure appropriate venitlator or flow source alarms are set before connecting breathing set to patient.Appropriate patient monitoring must be used at all times.Failure to monitor the patient may result in serious harm or death.
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