Carefusion received the user facility/importer medwatch report on (b)(6) 2015 where the customer stated that during high frequency oscillatory ventilation, the respiratory care practitioner noted that the indicator for deltap climbed from 30 deltap to 140 deltap on the front panel indicator and the ventilator began alarming.The respiratory care practitioner could not control the climbing deltap indication by correction power or pressure adjustments.The patient airway pressure remained at 20.5 cm h2o and the patient's chest movements seemed "normal." the biomed department was contacted to assist in exchanging the ventilator and the problem ventilator was sent to the biomedical for repair analysis.The biomed troubleshot the unit and noted fluid buildup and pooling near the internal differential pressure transducer and static pneumatic tubing loop.It was also noted that this was the third failure of this type in the last four months.The biomed cleared and flushed the tubing and transducer and retested the oscillator to normal operation and performance.After further investigation, the customer reported that the ventilator was exchanged and no there was no patient harm or injury.
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