(b)(4).Method: the complaint rt266 infant dual heated evaqua2 breathing circuit was returned to fisher & paykel healthcare in (b)(4) for investigation.The complaint device was visually inspected.Results: visual inspection of the complaint circuit revealed cut-like damage to the inspiratory limb.A lot check revealed no other complaints of this nature for the lot number provided.Conclusion: the damaged inspiratory limb of the complaint circuit appears to have been damaged with 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.This suggests that the damage occurred to the circuit after it was released for 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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