The following were reviewed as part of this investigation: patient severity, frequency analysis, applicable previous investigation(s), sample (if available), applicable fmea documents, and labeling.Based on a review of this information, the following was concluded: the complaint of a leak in the infusion set was confirmed and the cause appeared to be supplier related.One 20g x 3/4¿ safestep infusion set with y-site was returned for investigation.Water leaked from the y-site valve.Under relatively low hydraulic pressure, a continuous leak was observed at the y-site.With increased hydraulic pressure, no fluid leaked at the y-site.A microscopic examination of the y-site revealed what appeared to be a malformed blue valve stem.A microscopic examination of the y-site revealed no damage to the exposed surface of the blue valve stem.The y-site was dissected and the blue valve stem was removed, which revealed material missing from the sealing edge of the valve.The damaged section of valve stem was completely enclosed within the valve housing; therefore, damage during use was unlikely.It was determined that the increasing pressure caused the valve to seal and prevent fluid from leaking through the damaged area of the stem.The supplier was notified of the damaged valve stem.
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