Other, other text: device evaluation: the investigation of the complaint was limited because no sample was returned.During 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.Each cuff shall be also tested by customer prior use as per instruction for use lls10001031-001 rev.100, page 3, instruction for use section, point 1: "the integrity of the cuff and inflation system should be checked prior to insertion".It is the most probable that reported failure occurred during use or during tracheostomy procedure due to contact with sharp edge which is in conflict with instruction for use lls10001031-001 rev.100, page 5, precautions section, point 6 "guard against cuff damage by avoiding contact with sharp edges".Unfortunately without the sample we are unable to determine true root cause of this issue.A review of the device history records shows there were no observations recorded during manufacture to suggest an issue of this nature would occur with this lot of product.
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