(b)(4).Additional information was received from the customer confirming that the reported issue did not occur during a procedure.In addition, it was confirmed that there was no patient or healthcare professional injured as a result of the reported issue, nor was there any medical or surgical intervention required.The customer indicated that it was unknown what caused the spark, but confirmed that there had been no water spilled on the heater.The customer confirmed that all of their equipment, including the nebulizer heaters, goes through a preventative maintenance inspection.The customer confirmed that the heater is no longer available for return to carefusion for investigation.Since the actual heater is no longer available, an evaluation of the device could not be performed by carefusion.Investigation into this serial number determined that the heater was manufactured on 01/04/2008.It was also determined that the heater was purchased on 03/07/2008, and may have been in use for 7 years.It was confirmed that the warranty of this heater expired 03/08/2009.The device history record (dhr) was reviewed for this lot number.The dhr showed that this lot passed all initial testing (hi voltage, power, current leakage, temperature, resistance, and burn in).Without the actual complaint device, the exact root cause could not be determined.A review of the carefusion complaint system was performed for this product ((b)(4)) over the last 24 months.There have been no other reported complaints for a spark/fire/flame during this time period.The reported issue will continue to be trended and evaluated by carefusion.This appears to be an isolated occurrence.
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