(b)(4).A device history record review was performed on the epidural catheter with no relevant findings.The customer reported the catheter is blocked.The customer returned one snaplock adapter, one flat filter, one epidural catheter, one 5 ml non-teleflex syringe, and lidstock.The snaplock adapter, catheter, and syringe were received connected together.The returned components were visually examined with and without magnification.Visual examination of the returned snaplock adapter revealed the snaplock adapter appears typical with no observed defects or anomalies.Visual examination of the returned flat filter revealed the filter appears typical with no observed defects or anomalies.Visual examination of the returned catheter revealed the catheter appears used.Biological material can be seen within the inner coils of the catheter especially at the distal end of the catheter.A manual flow test was performed using the returned components.A 20 ml lab inventory syringe was connected to the returned flat filter, the returned other remarks: snaplock adapter, and returned catheter.Using hand pressure, the water was injected.No flow could be established out of the distal tip of the catheter.The test was repeated using the returned flat filter with the returned snaplock adapter and lab inventory epidural catheter.Flow could be established to the distal tip of the catheter, indicating that there are no flow issues with the returned flat filter or snaplock adapter.An attempt was made to thread a lab inventory wire through the epidural catheter from the proximal end.The wire threaded approximately 17.8 cm (c05158) from the proximal end of the returned catheter until an occlusion was found.The wire would not thread any further.An attempt was made to thread the lab inventory wire from the distal end.The wire threaded approximately 7 mm before and occlusion was found.The wire would not thread any further.Microscopic examination where the catheter was blocked indicated biological material is present between the catheter's inner coils and the catheter is completely occluded (b)(4).A corrective action is not required at this time as the condition of the sample received and the information provided indicates that operational context caused or contributed to this event.The reported complaint of catheter being occluded was confirmed based on the sample received.The returned epidural catheter was found to be completely occluded with biological material.Microscopic examination where the catheter was blocked indicated biological material is present between the catheter's inner coils at approximately 17.8 cm from the proximal end as well as the distal tip.A device history record review was performed on the epidural catheter with no evidence to suggest a manufacturing related cause.Therefore, based on the condition of the sample received and the information provided , operational context caused or contributed to this event.
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