Catheter was returned for evaluation: failure analysis: the catheters were visually inspected; some biological debris was noted near two of the ventricular catheter holes.The catheters were irrigated, no occlusions noted.Root cause: no root cause could be determined as the technician could not confirm any problem with the catheters at the time of investigation.The possible root cause for the issue ¿the shunt was diagnosed as clogged by pumping¿ reported by the customer, could be due to biological debris and protein build up interfering with the catheters, at the time of investigation no occlusion issues were noted.
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