Additional information: d10 one portex tube was returned for analysis.Under visual inspection the sample appeared to be in good condition, no water in inflation system was observed.During the manufacturing process the devices are 100 percent inflation tested, which includes inflating each device cuff and leaving for a 12 hour period.Reductions in pressure over this time are considered a failure and the device would be rejected.The inflation test was repeated on the received samples.It was confirmed that after 12 hours the cuff was still fully inflated.Based on results of testing the reported failure was not observed - inflation system was confirmed to be closed without any leak which might be entrance point for reported water.The most probable cause is that customer put water into pilot balloon during cuff inflating.No trend of similar customer complaints was identified.
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