(b)(4).Method: the complaint rt266 infant dual heated evaqua2 breathing circuits were not returned to fisher & paykel healthcare in new zealand for investigation.Our analysis is accordingly based on the information and photographs provided by the healthcare facility, and the results of previous investigations on similar complaints.Results: the photographs provided by the healthcare facility showed that there were multiple holes in the inspiratory and expiratory limb of the circuits.Conclusion: we were unable to determine what may have caused the damage found to the complaint circuits.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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