(b)(4).Method: the upper head harness of the complaint infant warmer was returned to fisher & paykel healthcare (f&p) (b)(4) for investigation and was inspected.Results: visual inspection of the returned component revealed that the connectors on the head harnesses were discolored.Conclusion: the upper and lower harnesses are used to connect the head unit to the control unit of the infant warmer.Previous investigations of similar complaints revealed that the discoloration was most likely due to poor electrical contact caused by the degradation of the harness connectors.This degradation is likely a result of swivelling of the warmer head.The subject infant warmer is over 10 years old.All components on the harness assembly of the infant warmer are enclosed in a sheath and fire rated by underwriters laboratories (ul).The entire harness is enclosed in a ul v-0 rated fire retardant enclosure.Should the connectors completely fail during the operation, an audible and visual alarm will be registered on the front control panel of the infant warmer, thereby allowing the hospital staff time to act and provide other means of warming.The infant warmer technical/service manual also contains a checklist which specifies that users perform safety, performance, and functional checks at least once a year.
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