It was reported that the cannula could not be blocked.It was blocked with 12 milliliters (ml) of air to begin with.There was a kink/adhesion on the side of the cuff balloon and the cuff could not be completely blocked properly.After repeated unblocking and blocking, the adhesion came off.However, at 28-30 bar, the cuff and test balloon were very soft and misshapen.In the end, unblocking could not be done completely with a cuff manager.Residual air in the cuff had to be unblocked with a syringe.With the cannula in place, this could have led to severe irritation or even damage to the patient.No injury was reported.
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