Evaluation results: one portex blue line ultra (blu) tracheostomy tube was returned in used condition.Visual inspection revealed that the inner cannulas had split across its length.To verify that the inner cannula durability, the technician carried out informative testing on randomly selected inner cannula samples of each size (6.0mm - 10.0mm, both fenestrated and non-fenestrated versions) from current batches to measure their performance using established standard test methods.Based on the results of the testing of the current blu thin wall inner cannulas it was determined that they were suitable for their intended function.The investigation results indicated that the event was most likely caused by excessive force used during cleaning or due to an incorrect cleaning technique.
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