The actual device and a photograph were returned to the manufacturing facility for evaluation.A review of the photograph revealed the female connector of the yellow stopcock had been fractured at the base and the yellow stopcock had come off.The sampling line had also come off the cradle component.Visual inspection of the actual device revealed, in addition to the findings from the review of the picture, that the sampling system had also been fractured at the bonded joint of the female connector of the red stopcock to the male connector of the yellow stopcock.Visual inspection of the cradle component found the trace of the adhesive.This indicates that insufficient application of the adhesive is not the cause of the sampling system having come off the cradle component.Further inspection of the fracture cross sections under magnification and electron microscopy revealed that the fracture cross sections at the base of the female connector of the yellow stopcock had some smooth segments and rough segments and on the smooth segments the generation of some streaks were noted.On the fracture at the bonded joint of the female connector of the red stopcock to the male connector of the yellow stopcock, the fracture end on the yellow stopcock side was noted to have a tapered shape and appeared as if it had been crushed.Both fracture cross-sections were in the rough state.Function testing was conducted: the sampling line system was fractured by the female connector being exposed to a shock force.The female connector became fractured at the base.The fracture cross sections were noted to have some smooth segments and rough segments with the generation of some streaks on the smooth segments.The state of the fractured cross section was observed to be very similar to that of the actual sample.A review of the device history record and shipping inspection record of the involved product code/lot number combination was conducted with no relevant findings.A search of the complaint file found no other report with the involved product code/lot# combination.There is no evidence that this event was related to a device defect or malfunction.Although the exact cause cannot be definitively determined based on the investigation results, it is likely the actual sample was subjected to a shock force.The fracture noted at the bonded joint of the female connector of the red stopcock to the male connector of the yellow stopcock is likely to have been caused due to the actual sample having been subjected to some distorting and/or bending forces during transportation back to manufacturer.The device labeling does address the potential for such an occurrence in the instruction for use (ifu) with the statement such as the following: "do not use if the package or device is damaged (e.G.Cracked) or any of the port caps are off." (b)(4).All available information has been placed on file in quality assurance at the manufacturing facility for appropriate tracking, trending and follow-up.
|