Initial reporter phone#: (b)(6).Reason device not evaluated by mfg: other; device was not returned to manufacturer.Investigation summary: the investigation of the complaint was limited because no sample was returned.During the manufacturing process the devices are 100% 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.History of internal ncrs showed that there was a raised internal nonconformity report ncr1826 due to cuff tear which was found after inflation testing.Corrective actions have been taken, including initiation of quality alert, training of the whole production team during a production town hall meeting, replacement of gauges and equipment with sharp edges by blunt versions, warnings in manufacturing procedures, and establishing better organization in the affected workplace.No trend of confirmed complaints in relation with this issue was identified.A review of the device history record (dhr) shows there were no observations or nonconformities recorded during manufacture to suggest an issue of this nature would occur with this lot of products.Unfortunately, without the sample the true root cause of this issue could not be identified.
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