The customer reported that the tidal volume too low while in use on patient.The customer reported no patient harm.The customer reported the ventilator settings were s/t mode, set ipap 12cmh2o, set epap 6cmh2o and reading of tidal volume below 200 ml.The customer reported the circuit type is a standard circuit, mask type is x1 and port is dep.The customer reported performance verification testing failed.The field service engineer reported replacement of the gas delivery system resolved the reported problem.The unit passed all applicable testing.
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