(b)(4).Method: only the swivel wye of the complaint rt265 infant dual heated evaqua2 breathing circuit was returned to fisher & paykel healthcare in (b)(4) for evaluation.The returned swivel was visually inspected and pressure tested.Results: visual inspection revealed a crack in the swivel wye and scuff marks on the rim of the connector.The circuit was pressure tested and revealed that it was out of specification.A lot check was not performed as a lot number was not provided.Conclusion: based on the appearance of the observed damage to the swivel, it appears likely that the cracking was caused by some form of physical impact.The customer has confirmed that the subject breathing circuit was in use for four days before the issue was observed, which indicates that the circuit became damaged during use.All rt265 infant dual-heated evaqua2 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.Our user instructions that accompany the rt265 state the following: - "check all connections are tight before use." - "perform a pressure and leak test on the breathing system and check for occlusions before connecting to a patient." - "set appropriate ventilator alarms.".
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