(b)(4).Method: the complaint bc161-10 bubble cpap system, including the inspiratory limb, expiratory limb, mr290 autofeed humidification chamber and pressure manifold, were returned to fisher & paykel healthcare in new zealand for evaluation.Results: the plastic bag was returned unsealed and the pressure manifold's oxygen monitoring port cap was missing.Conclusion: we were unable to conclude if the missing part was missed during assembly or if it went missing at the customer's facility as the package was returned unsealed.The pressure manifold is 100% pressure tested and pressure set at the assembly line and those that fail the pressure test are isolated.The pressure manifold would fail the pressure test if a port cap is missing.The user instructions that accompany the bc161 bubble cpap circuit kit state the following: ensure that any unused ports have their caps and/or plugs in place before use.Test circuit for occlusions and pressure leaks using the flow elbow provided before connection to the infant." the user instructions additionally instruct the user to test the circuit for occlusions and pressure leaks before connecting the system to the infant.
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