(b)(4).Method: the hospital reported one complaint rt266 infant dual-heated evaqua2 breathing circuit but returned two devices to fph in (b)(4) for evaluation under this complaint reference.The returned breathing circuits were visually inspected and pressure tested.Results: visual inspection of device 1 revealed a white split on the inspiratory limb while multiple splits were observed in device 2.Stress marks were also noted along the grooves of the inspiratory limbs of both devices.The pressure test result was outside of specification in both devices.Conclusion: we are unable to determine the root cause of the fault reported by the hospital.However based on our investigation, the subject inspiratory limbs appear to have been scratched by a sharp object.All rt266 infant dual heated evaqua2 breathing circuits are visually inspected and pressure and flow tested during production, and those that fail are rejected.The subject breathing circuit would have met the required specification prior to distribution.Our user instructions that accompany the rt266 infant dual heated evaqua2 breathing circuit 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." - "do not soak, wash, sterilize or reuse this product.Avoid contact with chemicals, cleaning agents or hand sanitizers.".
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