(b)(4).Method: the complaint rd900 neopuff was returned to our service center in the (b)(4) where it was inspected by a trained fisher & paykel healthcare (fph) service engineer.The valve system was returned to fph (b)(4) for further evaluation.Results: visual inspection revealed no physical damage to the returned components.Performance check of the neopuff revealed that the valve system was out of specification.No damage was noted to the valve system components when it was disassembled.Conclusion: we are unable to determine what may have caused the valve system to fail the performance check.All neopuff units are visually inspected and performance tested prior to leaving the production line, and those that fail are rejected.This suggests the subject neopuff device was damaged after being released for distribution.The neopuff technical manual states the following: "dropping the neopuff / perivent infant resuscitator or other similar forms of impact may cause damage resulting in incorrect operation of the unit.If you suspect damage to have occurred, please perform checks as outlined [in the manual] before connection to a patient".In addition the neopuff user instructions state that the user should "check manometer reads zero with no gas flow" and check the pressure settings "prior to every use of the neopuff".The complaint neopuff was fitted with a new valve system and it was returned to the customer after passing the safety and performance checks.
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