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(b)(4).Method: the complaint icon+ premo cpap humidifier was returned to f&p healthcare in new zealand for investigation.It was visually inspected and performance tested.Our analysis is accordingly based on the results of our investigation, and additional information we received from the healthcare facility.Results: the returned icon+ unit was inspected externally, and showed no signs of impact damage.When power was applied, the unit turned on and functioned normally.The internal fault log was checked, and no faults were recorded.The unit was tested by running it for two hours.The unit continued running at the end of this period, and no error codes were displayed.The returned icon+ was subsequently tested with a chamber filled with water, and compared to a known good icon+ unit.Both units were set with the same humidity and pressure settings under the same environmental conditions.Test result showed the amount of water consumed by both icon+ units was comparable.The complaint icon+ unit was also opened for further investigation, and no evidence of any fault was observed.Attempts were made to obtain more information from the patient regarding the reported incident; however, no significant information was received.The healthcare facility was not able to confirm if the patient had actually consulted her physician.The healthcare facility did not consult a physician either when they were notified by the patient about the water that allegedly went inside her lungs.The healthcare facility confirmed that no diagnosis and supporting investigations were undertaken when the reported incident occured.They are also not aware if the patient has any concurrent medical concerns.Conclusion: no evidence of any fault was observed during testing of the complaint icon+ unit that could cause the reported incident.Condensate in the humidification system, although not preferred, is an expected side effect of heated pass-over humidification systems in many conditions, and may vary between light misting to water droplets that form on the wall of cool breathing circuit tubing.The amount of condensate in the ventilation system is influenced by multiple set-up and environmental factors.The user and care manual that accompany the icon+ cpap humidifier state the following: "ensure the device is stored and operated on a surface, level or below head height, to prevent water entering the tube and the device enclosure." "do not operate the device, water chamber or breathing tube if it is dropped, damaged or not working as intended.".
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