(b)(4).The complaint rt266 breathing circuit was not returned to fisher & paykel healthcare for evaluation as it was discarded.Our investigation is thus based on the customer's description of events, inspection of a photograph provided by the customer, and our knowledge of the product.The customer reported that the swivel piece came apart when the patient was being turned around and noted that there was no damage to the swivel.Conclusion: the disconnection of the swivel piece is possibly a result of undue tension on the circuit during repositioning of the patient.Our user instructions state to "check all connections are tight before use." the infant swivel elbow and swivel wye are assembled using a machine to ensure a consistent tightness of connection.The swivel assembly is then 100% pressure and flow tested as part of the infant breathing circuit before leaving the production line.Any circuits that fail these tests are rejected.The user instructions that accompany the rt266 also 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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