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The customer reported the tubing had a large bubble near the filter, and when the tubing was disconnected, the tpn backflowed.One sample of material 10015012, lot number unknown, was returned.Upon initial visual examination, the set had no defects or abnormalities.The set was set to run tapwater at 125 ml/hr for 1 hour, in order to test the air inline and backflow issue.The issue was unable to be replicated.After priming, the set ran without issue.The complaint of air in line could not be verified.The root cause for the issue is unknown without a replicated failure.There are possible root causes related to the tpn and filter relationship, however that should not arise after just 2 hours of infusion, the only potential issues are with day long infusions.The supplier of the filter has been notified of the failure.This incident has been added to our database of reported incidents.Our business team regularly reviews the collected data for identification of emerging trends.Your assistance in this matter has been helpful in trend identification and supporting our commitment to continuous quality improvement.
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