(b)(4).The complaint opt314 cannula was not made available for evaluation.The hospital could not provide photographs or any additional information.From the description of events, it appears that one or both of the flexitubes (cannula tubing) was damaged at the swivel grip joint, which connects to the breathing circuit.Conclusion: the damage to the flexitube(s) is likely to have been caused by excessive pulling force being excerted on the tubing.All optiflow junior cannulae are 100% leak and occlusion tested after final assembly and any cannula that fails is discarded.In addition, samples are taken hourly from each run and pull tested to check glue joint strength at the cannula/tube joint, as well as the swivel grip joint.If there are any failures the entire batch is put aside for further investigation.The user instructions illustrate in pictorial format the correct set-up and proper use of the optiflow junior nasal cannula.They also state the following: - ensure that all connections are secure during use.Check cannula is undamaged and that the flow path is maintained.- appropriate monitoring must be used at all times.- do not stretch or crush tube.
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