It was reported during a percutaneous transhepatic biliary drainage (ptbd) in the chest, the ultrathane mac-loc locking loop biliary drainage catheter would not separate from the cannula.The device was removed.To date, additional patient and event information has not been provided.As reported, the patient did not experience any adverse effects or require any additional procedures due to this occurrence.
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Additional information: additional information received identified another device was successfully used to complete the procedure.Investigation ¿ evaluation: a review of the complaint history, device history record, documentation, drawing, instructions for use (ifu), manufacturing instructions, quality control, specifications, and a visual inspection/dimensional verification, of the returned device were conducted during the investigation.The visual inspection of the returned device confirmed the stiffening cannula was difficult to remove.However, it cannot be determined with certainty why the stiffener was difficult to remove.Because the device failure analysis indicated the stiffening cannula was bowed upon withdrawal, it is reasonable to suggest that the bowed stiffening cannula made it difficult to remove.It is also reasonable to suggest that the inability to withdraw the cannula resulted in the cannula becoming bowed.It is also reasonable to suggest that the cannula became slightly bowed during shipping/handling.It cannot be confirmed which event regarding the bowing of the cannula occurred first, or whether it attributed to the reported failure.Also, biomatter present at end hold of catheter, therefore end hole diameter could not be measured.Catheter bisected in order to measure id.The device passed all dimensional testing.Additionally, a document based investigation evaluation was performed.There is no evidence to suggest the product was not made to specifications.A review of the device history record showed no nonconforming events which could contribute to this failure mode.It should be noted there were no other reported complaints for this lot number as the other complaint for this lot was created for non-reportable failure mode.Based on the information provided, the examination of the returned product, and the results of our investigation, a definitive root cause could not be determined.This failure mode has been escalated per internal processes.We will continue to monitor for similar complaints and have notified the proper personnel about this event.Per the quality engineering risk assessment, no further action is required.
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