(b)(4).Received one (1) 1613, ventilator tubing set, long length, for investigation.Upon receipt the tubing was visually inspected for any signs of abuse/misuse/ damage.During visual inspection, a slit was visually identified on the column side of circuit, approximately 10 inches below the wye.The slit is approximately 3/4 of an inch in length.The device history record of batch number 74m1800028 has been reviewed and no issues or discrepancies were found which could potentially relate to this complaint.No non-conformance reports were originated for the lot in question that can be associated to the complaint reported.The dhr shows that the product was assembled and inspected according to specifications.Based on the investigation performed, the reported complaint was confirmed.A significant "slit" was discovered in the blue tubing causing profuse leaking.The slit is very linear , which would suggest the tubing came into dangerous contact with a sharp object.Although the complaint has been confirmed, a root cause could not be established.
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