The device was tested by the service technician.All tests were passed according to specification and the device was returned to use.The technician downloaded the logfile.The description of the event and the logfile returned provided a basis for the investigation.All information available were analyzed regarding the reported restricted volume delivery the reported symptom could be confirmed as the logfile revealed that the device repeatedly alarmed for "apnea, "inspiratory pressure not attained", "minute volume low" indicating a significant circuit leak indications for a product malfunction were not present, as e.G., a peep valve failure or a leakage in the internal pneumatics of the device would have been documented within the logfile.The root cause is most likely an untight connection causing limited pressure and volume to the pt.Significant circuit leakage may restrict sufficient ventilation and oxygenation of the patient leakage is measured within the pre operation self test and during ongoing ventilation resulting into corresponding alarms.Further measures were not taken as the device was tested and returned to use.
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