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(b)(4).Method: the subject mr290v vented autofeed humidification chamber provided as part of the rt265 dual heated infant circuit kit was not returned to fisher & paykel (f&p) healthcare for evaluation.Our investigation is based on the information, video and description of events provided by the healthcare facility, previous investigations of similar complaints and our knowledge of the product.Results: visual inspection of the provided video observed that the mr290v vented autofeed humidification chamber provided as part of the rt265 dual heated infant circuit kit was leaking water around the base flange area, confirming the reported issue.Conclusion: without the subject device, we are unable to determine the exact cause of the reported fault.Every mr290v vented autofeed humidification chamber is pressure tested following the manufacturing process and any holes, cracks, or leaks would be identified during this process.In addition, the pressure test is followed by a visual inspection of each chamber.Any chamber which fails these tests is rejected.The subject mr290v vented autofeed humidification chamber and breathing circuit kit would have met the required specifications at the time of production.The user instructions for the rt265 infant breathing circuit include the following: do not use the chamber if the seals are not intact when received, or if it has been dropped.Perform a pressure and leak test on the breathing system and check for occlusions before connecting to a patient.Ensure there is a water supply connected to the chamber and that water is present within the chamber appropriate patient monitoring (e.G.Oxygen saturation) must be used at all times.Ensure appropriate ventilator or flow source alarms are set before connecting breathing sets to patient.Visually inspect breathing sets for damage (e.G.Crushed tube or cracked connector) before use and replace if damaged.
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