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Other, other text: device evaluation- four used samples were returned for evaluation.Using a standard syringe, 20 ml of air was inserted into the airway lines of the returned devices (reference picture).There were no issues identified with the cuffs inflating.A standard ruler (orange verification dot) was used to measure cuff symmetry on the devices.Locating the position of the worst case symmetry, measurements were taken from the outside of the cuff to the center of the shaft and then from the center of the shaft to the opposite outside of the cuff.The following are the measurements recorded for each device: sample 1 - 18mm/12mm, sample 2 - 20mm/10mm, sample 3 - 19mm/12mm, sample 4 - 18mm/12mm and sample 5 - 17mm/11mm.All measurements meet the manufacturing specification of 1/3:2/3.
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