It was reported during removal of the cannula, a lack of cuff symmetry had been observed.The lack of symmetric cuff inflation caused poor ventilation of the patient due to significant leakage, which led to the withdrawal of the cannula.It was further reported that a tracheostomy tube change out was successfully performed and there was no injury to the patient.
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Evaluation results: one bivona tracheostomy tube was returned for investigation.Visual inspection of the device did not reveal any defects.Using a standard syringe, 16cc's of air was inserted into the inflation line.The device measured 12mm with a standard ruler from the center of the shaft to the smaller side of the cuff; it measured 19mm from the larger side of the cuff.Although the cuff may have had appeared asymmetrical, the investigation determined it met the manufacturing specification of 60:40 ratio for tts cuffs.
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